Chevy Colorado ground issues and how to fix them.
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- Опубликовано: 22 июл 2024
- This video addresses the bad Chevy Colorado / GMC Canyon 1st gen under hood grounds and the problems caused by them. My truck has had issues with the blower motor, door locks, fuel gauge, and anti theft due to these. The problems seem to become more noticeable on hot day or on long drives where the under hood heat is the worst.
SP-105: located on the driver's side near the battery
SP-106: located on the Passenger side behind the engine airbox
SP 105:
Electronic Brake Control Module (EBCM)
Headlamp Beam-Select Relay (relay #47) and headlamps
Fuel pump and fuel-level sender
Fuel Pump (relay #51)
Run/Crank (relay #61)
Brake Reservoir level switch (sensor)
Wiper relay 1 ( relay #57)
Wiper relay 2 (relay #63)
Windshield motor
Windshield washer pump motor
Electric door locks - driver's
Outside electric mirrors
Inside mirror (courtesy lamps on the mirror)
Tail lamps (all... t-s, brake-lamps, back-up lamps, 3rd brake lamps)
Front turn-signal and marker lamps
Fog-lamp relay
Fog-lamps
Cargo lamp
Horn
SP 106:
Electronic Brake Control Module (EBCM)
Automatic transmission shift-lock control solenoid
HVAC control module
HVAC evaporator temperature sensor
Data Link Connector
Transfer-case control module (4WD only)
Transfer-case control switch (4WD only)
Window switch, right rear (crew cab only)
Door lock and window switch - front passenger
Heated seats option
Headlamp dimmer switch
Turn-signal/multifunction switch
Accessory switch (not sure what this is)
Hazard Lamp switch
Auxiliary power outlets (two)
chevy colorado ground issues
#ChevyColorado #GroundIssues #PhilosGarage 
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Thanks , Brother. ThIS FIXED MY BLOWERE RESESTOR. I have replaced two of them alrerady.... Now I am going to the other one on the drivers, and see if it fixes the door lock issues and possible ignition. THANKS A BUNCH, AND THANKS FOR THE HELP. Stan, big Island, Hawaii 2007 colorado.
These things are definitely the bane of my trucks existence. Thanks for the good video and details.
Bro. Much appreciation! My ac blower motor was out and i gave that ground connection a little jiggle and it started right up. Thanks a million! Its 112 in Mesa AZ today
It Worked!🙏 We cleaned and sanded grounds. We also ran extra ground wires to both grounding blocks. We were able to get my parents Canyon running, after sitting for the past Eight months! Thank You!!
Thank you soooo much The little tidbit about the frame not being grounded just might be what is my entire problem I am getting ready to go out now and work on it I pray this is my issue I’ve practically exhausted every other problem
I was just told about these. Code says my pcm is bad! Dash lights, turns off while driven, reduced power, can’t clear codes, door locks, blower motor only works on high. Told check my grounds before I buy a new pcm$$$ thx for this detailed video bro!
Thanks for the info, I would have never thought about checking the ground. It worked!
My problem was originally with the blower motor. It was burned out at the block. I found today that the connector for the blower was blown and broke off at the block and would not let the ground connect. I bent the "tooth' part that led to the ground wire inside the block for the blower. The blower is working but now the passenger window doesn't work. It only clicks. I guess I have to find out which tooth uses the ground for the window and check the at connector. I could have done something to that one also. It looked like two wires were having problems when I was in there poking around. GM must have discontinued the part since the dealer or auto parts stores don't have any idea what we need to fix this but you give a pretty good idea and example. Thanks for the short but detailed video.
My mechanic was stumped but this looks to be the issue with my colorado! Thanks so much for posting!
Was your truck not cranking was this the issue and it was fix with the ground splice
Thanks for the video I've been searching for that problem on my Colorado
Already replaced the mess under air filter "106". Today starting temoving battery to get to the "105". Work on 106 fixed dash light and ac blower not running. I am also going to remove and clean sockets on every single fuse in fuse box. Today, I created a new warning light just by pushing ALL the fuses in firmly.
I own a Colorado and have never had any problems with the grounds but many other owners have . Great video and description . This will come in handy for many owners . Thanks !
I have 4 Colorado’s 2 are v8 5.3 all have blower motor problems this ground is problem do as he said problems solved
No problem! Thanks for watching!
@@philofab is there anyway I can reach u on social media to talk more about this issue I’m having
06’ 4cyl colorado with 270k+ miles. i have had and fixed every little quirky problem these things can get. my piece of hot garbage melted and we got it back together with two new grounds, replaced the blower motor along with the resistor which i have found to be the most common problem with these. i love this truck. thanks for the info
I have an 05 colorado 4x4 3.5L ext cab and it runs good but...the lights on the cluster/gages goes on and off don't wanna stay on with auto lights...could it be an issue with splice pk on drivers side?
Very nice, I’ve got ground issues on my 5.3 also. Driver side grounds ABS also
Didn’t know about the one behind the battery box, I’ll have to “fix” that one too.
The one on the passenger side, I fixed by grinding the paint to bare metal, applying electrical grease and reattach the ground pack.
I’ve had to do the same thing with a ‘14 Ford Fiesta battery. They rely on the bolt to ground through painted threads. 🤦🏼♂️
Thank for the video. Found it while diagnosing headlights not working. But I did the grounds you posted and fixed the blower motor speed issues.
were the grounds also a result of bad ground? Mine are also not working
@@aaronwiens8764 , it was a bad ground for the lights and blower motor. good luck with yours.
Great job man ! Great video! I will be sharing with all my people lol
Nice this is actually helpful I have the same issues with mine
Old post but thank you very much, will redo my 05 tomorrow.
Exactly what I needed man
I don't know how GM even thinks they can build an electric car....nothing but electrical problems with any GM I've ever owned.
Had blower problems, replaced the resistor and harness in the blower still didn’t work cleaned the ground pack and it worked fine this works try it !!
I have an 04' 3.5 with over 325k+ miles. I've been having electrical issues and need to check those. Even with it's problems, I like that truck and I'm holding on to it as long as possible since it still runs so well for the mileage. Thanks for the video.
My 04 Colorado 5cyl has almost 300k on it and still driving it every day.
Damn my 04 4 cylinder only has 80k miles on it😂 and she’s only having issues with the rearview mirror lights and dome lights not turning on
I got an 04 3.5 5 with 362,000 miles on it and the last couple of weeks the passlock problem has reared its ugly head, and then today, after the passlock issue first thing, it began the stall with "reduced power" light thing. Arggh. It still runs good, when it runs but I need something I can depend on. I am redoing the grounds today.
@@awboat , we don't drive it much but ours is approaching 200K and the only things so far has been the "blower motor resistor burnout"... Then it cut off a couple of very random times like months apart and stored a DTC at some point which someone said meant that the PCM has to be replaced. Idk if that also relates to your "passlock" issue..
So far, I cleaned up a ground plate my Pops put in place of the factory ground block on the psngr side. I pulled the power, removed the PCM connectors looking for anything abnormal. Never found anything so reconnected them and the truck has been running fine ever since. Even with the EVAP monitor not ready, it recently passed emissions inspection just fine.
@@awboatI love it. My 05, 5 cylinder has 357k miles on it, runs great, but all 4 door locks won’t lock electronically but will manually. I suspect a ground issue.
Great video 🤜
Bro. Thanks so much for this information. Chevy really did us wrong on these models. My front passenger window and back left window has been having problems ever since I messed with this pack. I was trying to fix the AC blowers as mentioned in your video. I must have inevitably screwed up the connection to the windows. Will do back in and try and rework it. Hope it works. Mahalo from Hawaii.
So... that's exactly what it was. Rolls up and down now. Questions is now is how do I install a new one? Tried ordering the part form chevy parts department at the dealer and they have no clue what I'm talking about haha. So I guess I'll go in and show them.
I just cut the splice off, installed ring terminals, and bolted it back on.
@@philofab so basically, converge all six wires into the one ring terminal correct?
genkikai1 Yep. They are all grounds. You can also split them up on different ring terminals if you need to.
@@philofab Alright awesome. Thanks for the tip. Also side question. Have you had problems with the ABS, break, and traction light coming on then going off?
Thank you for the video. I haven't messed with it yet but the problem i'm having with my 05 Colorado is the gear shifter lock mechanism being unlocked when my headlights are turned on as if i'm pressing on the brake and it flips back and forth from on and off sometimes or operates normal when the headlights are off. I'm thinking it might be something to do with the grounds or the brake light switch but it's not effecting the brake lights. wish me luck
Great video thanks
Thank you I will try that cuz we changed battery, alternator and still sometimes no power even to the dash board hopefully this is the fix or do you have other suggestions
I have an 08 and I’ve been having grounding issues with the blower motor no the resistor, also the radio pops through the speakers soon as you turn the key on. So I bought a $25 grounding buss bar off Amazon and upgraded the SP106 to that. All my issues went away and radio stopped popping, don’t know if that was the problem for the radio but it’s not doing it any more.
Thanks great info!
Glad it was helpful!
Very hepfull vídeo sr thanks alot
I just bought a 2006 Chevy Colorado Z 71 yesterday. I really like the truck, but I have not used it enough yet to find these issues. However, on my way home, it died on me one time. I tried to turn it on a couple times it wouldn’t start and then I tried again a few minutes later and then it started. Thankfully, I made it home. But today I’m going to go in and out of the truck and see, the status of everything. If you have any more information about this, I’d appreciate it and thank you so much for your time and information.
I had one as well it was great. Now I have a tuned 2.8 diesel it's pretty good too.
04 canyon 3.5 do the small box next to the battery and ABs module has the grounds for the brake reverse and blinkers?
My problem is dash lights flickering or some working at different times or no dash lights at all. Ground issue or headlight switch?
I have been trying to find SP105 and SP106 ground slice pack to replace on my truck. I did managed to find these part #'s 12110842 and 12110844. Which one goes to which side? Thank you.
How would I go about fixing these, I'm new to auto work but I am having problems with these grounds.
my 2005 colorado is having a problem with the brake light on the rear of the bed,only. The third brake light work fine but I can get the rear ones to work. Every other light works fine except the drivers blinker which works when it wants to. Would you say this might be the problem?
I have a 2012 colorado and my my blinkers/hazards/highbeams work intermittently other then the grounds needing to the fixed is there anything else i should look at
Do you know where the ground is that goes to the 4x4 module under the seat on a 4x4 05 Colorado.? My lights on my 4x4 switch don't light up any more. Thanks
If your having intermittent speedo and fuel gauge problems is it passager or driver ground
What size bolts are used?
I own a 2016 Colorado, can you explain to me what is a grounded you keep talking about. what is its purpose and what happens if they are dirty. Do you think its the reason why my truck sometimes wont crank.
I currently have an issue with not cranking I bought a new battery and I clean the battery clams, did an inspection with the fuse box, inspected the ignition start rely fuse but it still experiencing not cranking at first start, it starts after many tries, that is not normal. Do you suspect its a ground issue. Where would I find these ground things on a 2016 Colorado 2.5. I suspect something is not grounding that is cause not to crank. Thanks for the vid
Do the brakes have messed up grounds.please help..
Can you tell me which side controls the tail lights? I thought I had a burnt out left tail light, I changed it and it still does not work.
Exactly how are the splice boxes opened please?
I’ve tried taking these apart once but felt like I was doing it wrong. Is there a video of taking them apart?
My 2006 Chevy Colorado only receives 9 volts to the ignition switch and clutch switch when the key goes to start position. Im pretty sure this loss of voltage is causing my s terminal on the starter to not get any voltage as well. Ik the battery alternator and starter are good 100% . Has to be a ground issue somewhere no?
All my dashboard icons turn on and off while driving, is the ground the problem? Where can i buy a better one?
Good job thanks
Can u help with a 2005 chevy colorado sunroof motor replacement how to ? Please
What they call this little part behind the battery and where can u get it , please answer , thanks . The blower work good , but sometimes don’t crank , sometimes after 10 minutes it will crank . Thanks 🙏
Hoped this was my fix but sadly no. 06 5cyl Colorado, if I start the truck then turn it off the cluster and radio lights won’t come back on next start unless it sits for a while. The green clock light and odometer light still work just none of the others on the cluster or radio. Stumped
What was the fix? A coworker of mine recently had problems getting his Colorado to stop running and it was difficult to get started again.
Thanks very much
I have that problem,you know how or what part number to look for? If you know I will really appreciate it
Does anyone have a link or know where to purchse new ones?
My 2008 Isuzu i-370 is having electrical issues.. has absolutely no power to the vehicle. Battery is brand new and i still have a dead truck.. will this fix the issue
I'm having fuse block issues when I press on it my engine dies when I release it starts
I have a 2005 Colorado crew cab and it has been nothing but a money pit. I bought it because I owned a 95 S10 and I loved that truck. This truck is a big pile of crap. I've changed the HVAC blower resistor & wiring, because I only the high speed and had a burning smell. I replaced the security module on the ignition switch, because sometimes it wouldn't start unless you knew the super secret trick to force the security module to reset itself. I replaced the instrument cluster, it just died and couldn't get it come on. Pulled it out and tested it, nothing. I replaced the headlight switch because they wouldn't turn on at all. Now my windshield wipers quit working and I have no cruise control. If this was a daily driver I would've junked it. I couldn't bring myself to sell someone this lemon even if I hated them. Luckily I own 3 other trucks and a few motorcycles I can drive instead.
Where is the engine block ground wire? Can’t find mine on my 2007 Colorado
Where is the ground for the 4wd located if there is one
Where do you buy them ? I cant find them anywhere
That is exactly what I need , but we're do you get it , I have been to several auto part stores
What are the part number for these
I can’t find the part at the auto part store
Anyone knows why 09-12 Colorado Canyon BCM BCU Body Control Module 15886074 8626 gets bad ?
I cut mine off and striped all the wires and put a copper lug on now my truck won't start it just clicks the relay every thing works just no crank ever had that issue ?
Maybe this will fix my problem with the brake computer.
When its hot outside, after a while I have three errors (abs, brake). Also the remote control don't work.
Had my 2012 Colorado a long time at a Chevrolet Dealer, they made a complete check and didn't find anything. Never heard of this error
I loved my 98, S10, 4.3, LS. Had it up to 2018. It was totaled. I picked up a 2006 LS Colorado with 26K miles. It took over 4 months of insanity, to get everything to work, including starting issues. It looks like new but Chevy took a great little pickup and F--d it up with the POS "Colorado".
I had Chevys or GM cars and trucks for a good part of my 85 years. Almost 70 years driving. Will never bye another GM vehicle again. :O(
Unfortunately MFGs don't make decent small pickups anymore. Not much else to buy as an alternative. I hear good things about the new Ranger tho.
@@philofab It is too bad. Pickups and work vans were the cheapest and most reliable way to transportation 50 years ago. Today you are forced to bye these super duper over loaded over engineered luxury Pickups and Vans with more bells and whistles than a Cadillac.
I don't know about anyone else but a heater and A/C (i live in Florida) a decent radio, with a box on the back is all I need. Impossible today unless you bye a worn out 50 year old piece of junk.
Toolman I agree. I’d love to buy another 93 Toyota pickup with a 4 cylinder and manual trans new. One of the best trucks I ever had. I might splurge with power steering this time. Lol.
@@philofab Ya I forgot to mention Power Steering.
My 98, S10, Ls was a luxury with a 4.3 Vortex V6 that was plenty fast for me. two folding jump seats in the extended cab. That was the beginning of LUXURY.
My 2006, Ls, Colorado has a strait 4 banger that at 85 years old I can run faster. That's if it will start! :O)
Ur right. The S- 10s, are far superior.
Hey man im looking at a 05 canyon 3.5 5-cylinder to buy. Great price low miles. I test drove it today and basically nothing works electrically on the inside except the right turn signal would not turn off and the 4x4 light worked. Thats about it. Do you think its alot more than just these splice packs?
It's difficult to tell with out proper diagnosis.
Great video,I will apply it for my 2006 chevy colorado 3.5, I got code c0899 so I believe this is the solution thank you
My cruise control stopped working on my 2005 Chevy Colorado!! Anyone have a simple fix.. my break lights all work and All interior lights work..
have 05 colorado. Rear drivers side running light won’t light up but brake and reverse light do. front passenger blinker doesn’t work, but rear does and blinks fast like bulb is bad but all have been changed and issues persist. any idea what to try? fuses are good as well.
I’d check the ground near the rear bumper on the frame rail, verify all the lights have correct type of bulb, and see if the turn signal flashes correctly with hazards. Also, look to see if someone cut/spliced wired for a trailer connector.
Love to see someone else that has the factory V8 Colorado....
They are rare! I almost break my neck when I see the V8 emblem.
@@philofab my brother has a '10 3LT crew cab and I have an '11 1LT crew cab. From what we know, were the only siblings to own a set.
I have a 2012 extended cab Z71 4WD 5.3L with 4.10s, and it rocks pretty hard. I’ll have to check out my ground connectors, I’ve had my blower motor quit on me a couple times for no obvious reason and come back on after a few hours to a few days, and I’ve had the ‘stability system’ light come on for a little while for no apparent reason once, too.
What exactly do you solder together in the connectors?
The sinner Jim Whitney The black box is just a slide on connector. If you cut it apart you can soldier each slide on terminal to the group block. Honestly if I did it again I’d just cut it off and out a ring terminal on the wires.
@@The_sinner_Jim_Whitney I guess he did the back side of the blocks. I need to do mine since I have my new volant cold air box to install. Just installed a full 3" x-pipe, black widow race venom exhaust, and it sounds beautiful.
Where did you get the replacement part? I have looked everywhere and can't find it.
I just cut it off and use a ring terminal. GM doesn't seem to sell it.
So did you buy a new one or clean off the contacts when you removed the splice pack?
I soldered the connectors on the first one, the second I just cut off and put ring terminals on.
I have a 05 3.5l colorado and it has starting issues half the time I have to use starting fluid to get it to start and then ill be driving fine and it will just lose power and pressing the gas will bog out and shut off idk what to do with it anymore.
I've put 3 used starters on it because they just keep going out and it has too many miles worth putting a new one on it.
I'm having the same problem with my o7 Canyon
Is it possible that messing with these ground splices (just taking them off and sanding the rust away) could stop the engine from starting somehow? After messing with them I don’t get any lights in the cab except check engine light, and it no longer starts.
What was the cause?
@@hummerguy after about 4 months and two different mechanics they were able to narrow it down to the module that runs the stereo. The guy that owned my truck before me put an aftermarket stereo in. Which the base module wasn’t capable of running so he installed one that was able to run it but it was put in very very poorly, same with many different electric issues he tried resolving. I can’t remember the module name off the top of my head, but that module ended up frying somehow, this messed with all of the other modules needed to run the truck or get power going anywhere, like the bcm. After replacing the module it ran as new, just rewired the taillight too so it was legal to drive lol
Oh and also do you know why my chevy Colorado over heats on idle ??? Crazy I hate it. We have done everything to try to fix it. Added an extra fan that’s the only thing that seems to help. 2005 150,000 miles 4dr
blower motor didnt work. Traced prob to no ground. I cleaned the little spades on the ground module best I could. Still occasionally blower didnt work. I shoved a rag against the wires going into the ground module. This made the ground have contact. I was thinking of taking all the ground wires and soldering it into a single ring terminal then bolting to the frame. Completely eliminating the module altogether.
That’s what I ended up doing. Just cut it off and used ring terminals and start washers.
Hey , soooo my vehicle doesn’t want to turn on. Ac , seats works , I try to turn it on it does a buzz sound when I turn the key. We try to jump starting the vehicle but still doesn’t work. So I don’t know I able get it check out … but , soooo my vehicle doesn’t want to turn on. Ac , seats works , I try to turn it on it does a buzz sound when I turn the key. We try to jump starting the vehicle but still doesn’t work. So I don’t know I able get it check out …
Great vid does this apply to a 2018 ?
I'm not familiar with the 2nd gen Colorado, so I do not know.
My 2005 Colorado has been seen by 3 mechanics including a Chev dealer. The problem remains. Occasionally the engine will not start when the key is turned but the panel lights come on. If the area is very quiet I can hear a faint clicking sound. If I wait 30-60 minutes or over night the engine starts immediately and will do so for weeks/months at a time. So far I've spent $700. Yesterday it happened again. I used a small battery charger and attached the black clamp to the head of a bolt on the chassis. Started right up! I don't know if I had simply waited long enough or if placing the black clamp on the bolt made the difference. Help!
Passlock module on the ignition switch. Buy the assembly but just change the module on the end.
Unless it's doing it a lot, there is a video on here that shows you how to get it started if the passlock is keeping you from starting it. It's a certain number of chimes and when to turn the key to different positions. Works every time for me. Mine acts up once or twice a year so it's not really enough to fix it
Ground issue, probably.
Would this problem cause main fuse box to burn tips off fuses?
It’s unlikely. It could possibly need a new fuse box due to loose terminals to the fuses crating a bad connection.
@@philofab thank you so much for your response.
Did you replaces the splace-pack or just cleaned the area I have the issue for the AC blower it just turn ON or OFF whenever it feels like
I have a 2009 Colorado that's been having some weird electrical issues. While driving my dash lighting, dash and radio will periodically go dead and eventually come back on but the blower motor still works though. ? The engine continues to run during an episode but I've also shut the engine off when this happens and I cannot restart for a few minutes. Is this a poor ground causing a relay to overheat and trip. That's my best guess.
If you have already cleaned SP106 behind the airbox and that has not helped, Maybe look into the ignition switch. I have heard the ignition switches on these trucks create a lot of issues. Next time it happens jiggle the key and adjust the column tilt to see if it affects it. If your truck has an aftermarket radio pull that out to make sure the wiring is done correctly and is intact. I can't count how many electrical problems I've fixed over the years that were caused by hacks installing radios.
@@philofab Sanded down the paint then cleaned behind both SP105 and 106 to better the contact points. Pulled the the mega fuse that had excessive rust on one side. Pulled the fuse block, everything looks clean. The aftermarket radio is a concern. I've noticed a burning smell on start up with the blower on hi.
@@darrenbutland2056 The burning smell is alarming. Did you disassemble the grounds at SP105 and 106? They are normally corroded inside plastic connector. I'm in AZ and mine were corroded... I can't imagine what they look like in a wet area.
@@philofab I did not. I'm southern Ontario so bi-yearly oil sprays are a common and have been done on this truck. The screws to the body were very clean but I will disassemble completely and check.
Darren Butland I had to solder the connector together and if I did it again I’d just cut it off and install ring terminals directly to the ground wires with marine heat shrink.
I have a good battery but i still don’t get power to my truck, and the terminals are clean. Could this be the problem?? If so do I buy a new one of what
Redd Cielo Zero power is not this. You may have bad battery cables or sometimes the connections under the fuse box have issues. Jiggle the wires going into the fuse box and battery cables while someone tries to start the truck and see if it does anything different.
@@philofab turns out the ground block was loose
have you had any issues on starting due to grounding problems? My dads truck has intermittent cranking issues. i cleaned and put the ground back on the battery and that seemed to help somewhat but now its doing it again
I had a problem with the auto lock feature. It wouldn’t start after shutting it off and trying to restart minutes later. Wait twenty minutes more and it would start. The key or the ignition cylinder was worn. I disabled the auto lock feature and cleared the problem.
@@user-jh8mo1gx6l when it would do it would you not have any lights or anything showing on the dash. it almost seems like he is losing complete connection to the battery but sometimes in 5 mins it will start right up. jumping will not help when it does it either so that leads me away from the battery. to be continued
@@joshuasims7357 my 2006 would try to start, cranking over and over, but would not start. I cleaned the key. My mechanics suggested a possible auto lock security problem which I researched further on a Colorado fans website. I had all the normal lights during cranking the engine. The auto lock light would go out when the engine finally started. This would happen every few days until I disabled the auto lock feature two months ago. Fine ever since.
👍📽
Where the SP 106 is located? Chevy Colorado diesel, 2016
I’m not sure where it would be located on a 2nd gen Coloroado or if it even exists.
Hello @philofab, I have a GMC Canyon 2005 3.5l with electric windows. I cannot get the passenger side to go down. When I click the button on either armrest, I here a relay tick, but window does not budge. Do you think the hot garbage is the cause of my window issue?
Possibly, if you pull the door panel off and use a meter to see if +12v and ground is getting to the motor it will help diagnose. The switches reverse power for up vs down, so it could also be a driver or passenger window switch problem, or a broken wire.
These trucks have a problem when the battery/power is disconnected ... door locks won't work and usually its the driver's side window ... there is a video on how to drain capacitor on window switch and it will fix it most times...
I have 2012 5.3 v8 Colorado it cut off at 70 miles a hour padlock light flashes one time have no dash light want turn over no power
Which side would do the evap solenoid?
Evap solenoid gets it's ground from the engine block, usually the ground on the back of the head.
@@philofab thank you
My 2007 Chevy Colordo is having a P303 code with number of misfires recorded and overheating in idol. I just replace the coil pack and plug and shows signs of burns on both. I replace the plug twice already. The issue still persists. I am trying not to go to GM cuz they will charge a fortune. The mechanic I deal with gave me a number of causes but he doesn't want to go through every one of them cuz it is a lot of work. I have seen that there has been more people with this problem but for different reasons of cause. The truck isn't losing oil at all but I haven't checked for compression issues on it yet. I keep thinking it might be electrical in nature because I had to change the brake light switch and I found out there was a recall on that switch because of contamination issues after I already changed it myself. I am starting to wonder now if it is just a grounding issue. I changed all of the relays and fuses to eliminate that possibility. I also changed out the Resister for the fan blower because a short in it. Resolved that issue. Still pondering now on the overheating in idol. Any suggestion would be welcome by anyone right now. Also I cleaned the throttle body. I am wondering if the TPS sensor will resolve this issue. Replacing it that is.
Pisces Overheating at idle is a cooling problem and will most likely be a bad fan clutch or plugged up radiator. The P0303 is a cylinder 3 misfire. Start by swapping the coil, plug wire, plug, to another cylinder and see if the misfire follows those parts. If it does not try moving the injector to another cylinder. A compression check on that cylinder is a good idea if you have access to the tool. Also, it unlikely a ground issue as it would manifest to more than one cylinder. I hope this helps.
@@philofab I replaced the fan clutch, recently the radiator as well, coolant sensor and water pump. The other cylinders are a perfect straight line when I had it checked. Cylinder 3 is the only one with an up and down line misfire problem. Coil pack that one the other day with new plug. Showed signs of arching still.
Pisces Hmmm. Seems like it’s been a pain. I suppose a ground or fuel problem could cause your issues. Either it’s lean creating heat or the ground is causing wonky temp readings. You really need to check the cooling system for combustion gases. A blown head gasket or cracked cylinder wall / head could cause both problems, the misfire and overheating.
@@philofab Yea, I just talked to another mechanic today and he did a compression test and it was 215 of 240 of what it was supposed to be. It was slightly low on compression but not extreme. His belief it could be a fuel injection problem, but if not he thinks on could be a bad engine. I am feeling on the fuel injection problem either or computer malfunction because of how it started 2 years ago. Coming back from a store in the month of August and starting the truck at the time. At START, Truck went into extreme high excelleration showing a extreme high temperature as if it was trying to bring down the temp. My fault was that I didn't let it keep doing it and I touched the pedal and it went down and stayed down. From there on it kept on overheating in idol above the middle line slightly while at stop lights or parked. I think now it is more of a communication error between the computer and the fuel Injector.
Well, if you have moved all the electrical components to other cylinders and the problem did not follow them it must be a mechanical issue with that cylinder unless there is an issue with the injector signal. There is only two wires to an injector, a constant +12v and a negative signal from the ECU. Pretty easy to test both with a DVOM or noid light. If you have not done a cooling system test looking for a cylinder leak or combustion gasses in the coolant it is the next logical step.
I'm having weird electrical issues with my 08 colorado all I did was replace the water pump and thermostat after I plug the battery back in my wipers automatically turn on and headlights but no power to ignition no dash lights
I'm also in Arizona
When this happened to me, I had to replace my Body Control Module and reprogram it
I have a 07 Colorado and man I'm telling you.. it's like the electric system has a mind of its own. I had to replace the heating core year and a half back. But here lately it's been overheating with ac on and while I'm stopped for a period of time 20 min or so....
But not all the time nor when it's cooler outside (don't overheat).
A while back the truck would start and idel real hard and shake super bad like it's having a seizure. I would have to shut it off asap! Also did it when I would come to a stop... And one day, it stopped and never has done it again?!?!!!?!!!
I am worried though because something is definitely not right but not sure exactly what to do about that. I do think it has something to do with evap system by the codes it throws.
Just took off the honeycomb muffler part and replaced it with straight pipe. And when I unhook the battery and reset the whole thing it seems to run amazing for a good while... But every once in a while I notice it trying to start acting up again.
I've noticed on these trucks they do a lot of weird things if the battery is old or not quite 100%. Have no idea why.
@@philofab My solution to the low battery is,,, I am 85 and do not drive as much anymore. The battery is 3 years old. About every month to six weeks I hook a battery charger and top off the battery. I feel that helps the electrical issues the Colorado has. I did the ground rework thing. I know that helped a lot. My issue is I do not trust the vehicle to go on any long trips. I have never had a vehicle that left me stranded. I hate to start now.
Walmart service shops have good battery checkers. Computers need good batteries.@@CorbinAce
Where can I buy just that part
Autozone
@@Jonathan-SZ I have tried 3 they all said they don't sell it and that it's probably a GM part
I did what you said and it worked but now the passenger window doesn't work
There is probably still a bad ground on SP106. Try jiggling SP106 and see if it helps. There is also a small chance the BCM needs a few days to reset. I have no idea why but these trucks have issues with the windows and door locks sometimes when the battery is disconnected or replaced. Most of the time it starts working 0-12 hours after the issue.
@@philofab it works now.
But now the dashboard says abs branes faulty or something like that.
I took the black box off and tried to put the wires all the way in place I mean they are not lose but maybe faulty wire I don't know and put it back and everything works fine now.
Thanks for sharing the video
@@habennhaoved2968 I know this is an old issue but worth mentioning is I noticed when I did my ground thing it appears you have cleaned the fender of paint but the gray primer looks like metal. I took a scraper and made sure I was down to bare metal before re-connecting the grounds to the fender. I also protected the connection to prevent corrosion. Just saying. I hope this also may help someone else.
My issue is none of my powered windows and I can unlock or lock my truck without the key. Only power me thing that works is my mirrors