The cateye silverados are truly the most beautiful trucks built by man. These year models are the last of a generation when men and women actually worked and put blood sweat & tears into their craft. With the 1500 HD, you got yourself a rare one. Keep it, forever!
Thank you for the in depth detailed video! I’m about to take my 03 1500HD 4x4 with only 135k miles on it to the dyno in two weeks or so. The fuel enrichment god. So that explains why it feels like it’s “lugging” when you really want it to get up and go
I find that the best mod you can make to these older 4 speed trucks is a gear swap, look into a gear vendors you can run 5.13 gears and your highway rpms would be the same as the 4.10s without the gear vendors it's really cool stuff and really brings an old 4 speed up too par with the new trucks especially a 4L80 considering how long first gear is
My 05 2500hd with an aluminium 6.0, shaved 243s, flat tops, tsp stage 3 low lift, tbss manifold, 30lb injectors, long tubes and full exhaust put down 308/314 on a mustanh dyno I have 34" mud terrains and 20 inch wheels but wow, one of us has some wrong numbers.
I'm certain mine were skewed high for some reason, although I'm also certain that the 34" MT's are hurting you haha. Your numbers sound much more believable.
Lmao, right? Funny thing is I never even found out about the whole GMT thing until maybe a year ago haha. Always just called them a cat eye or “angry headlight” style lol
i recently took my 2000 silverado 4.8 ext to get a dyno tune. I prevousily dyno it and i made 251 hp and 180 torque. after i got it tuned, just having a cold air intake it was able to push 287hp and 270 torque. keep it in mind i paid 400 for the tune and it had 230,950 miles on it.
@@TonyTheTruckGuy I was surprised and so was my tuner. Now I'm just want to run nitrous on it but I have no clue how much hp it can resist without having any issues
I have a 2017 Silverado 6.0 3500 and modified my tune with HP tuners. Dropped about 3 sec off 0-60 and I can now spin my 33s whenever I want.. worth it
this is exactly what i was looking for i have a 2500hd 2001 lq4 6.0l with 33" tires and it runs pretty solid (very very good actually for 180k) so i would say its probably safe to say i would be close to the same power other then i have a brand new wix filter and dual muffler/exhaust but not strait pipe
Really makes me wonder what mine puts down. I tuned it myself via HP tuners, timings around 22-23 degrees with zero knock and timing adders zeroed out, added a ton of fuel (using a Wide Band to tune WOT) and have it dialed at 12.5 or .85 lambda at WOT, through a NV4500. It surprises me for being a 6500 lb truck.
Sweet truck i love these years.Those crank values are closer to 50% not 20%. But thats a good gain in power for some tuning. Makes me wanna take my 01hd in for a tune. But once i start searching for power its hard for me to stop. Lol.
It wasn’t even really a “tune”, he just removed the speed governor and turned up that “fuel enrichment” so the injectors would actually spray 100% when commanded. It’s still the stock tune file otherwise!
Gm has always low rated their hp numbers up until probably recently. It was notorious when you see the specs on the GNX and other vehicles after the 70s gas crisis. So it's not surprising if the 300hp flywheel being lower than actual hp
Did this affect your gas mileage? I mean, more fuel seems like it would be less mileage, but if you don’t need to mash the gas and wait for rpms it seems like it would help.
Not sure exactly what all specific parameters he set, all I know is he used HP Tuners and went under the “power enrichment” tab and then changed the rpm at which it gives full fuel. That and removed my speed limiter.
No I’m spread thin on money right now so this project has unfortunately been paused. Would love a cam and low boost turbo combo though with similar wheel horsepower numbers to what you’re looking for.
what’s that squealing noise when i get to certain rps or whatever mine does that too could be what i got in the air box i’ve heard certain performance ones make that noise 😊
Question for you. Do you still have that truck? I see you're from Minnesota. Wondering about the reliability of it. I'm actually looking at buying one same year.
I do! Needs some TLC that I have to address and might be selling it next year after that but this generation Silverado is my favorite. They have a few quirks like all vehicles, but overall very capable and dependable trucks without all of today's overly expensive electronics. The key is finding one not rusted in half by now lol.
Negative. I've got some small stuff going on with the truck but mostly maintenance and cosmetic upgrades/repairs currently. Recently got a motorcycle and a cammed Pontiac G8, so money has been tight lol.
I have the 1500HD (2003) but 2WD. With a level kit, do you think i can fit 33/12.50 M/T wrapped in 20x9 0 offset with no major rub issues? Unfortunately for me, with the 2wd train my only options are level kit, 3 inch lift or the big 6 inch.
I think you will probably rub. My buddy had a 4x4 2001 Sierra with 2” level and his 33x11 all terrains rubbed his mud flaps on stock wheels. You’re going to be sticking out even farther with a wider tire and 2wd sits lower than 4x4. Even these tires on this truck rubbed on the front bumper lower balance before doing some trimming and they’re only like a 31.5 or 32” tall tire. Not sure on wheel specs though as these were on the truck when I bought it.
@@TonyTheTruckGuy I will most likely have to settle with the 6 inch lift then. I wish the 4 inch were available for 2wd, to save a bit of cash. I. definitely don't wanna worry about rubbing, and with M/t it would be bad even with a Norcal trim it seems. Thanks for your response! Hard to get a reply on youtube with Truck guys so big thanks, brother!
@@TonyTheTruckGuy ok let me know when u do cause I just pick up a 2002 3/4 6.0 ls with 223000 miles on it yesterday and that going to happen or in (motor going in a half ton ) with cam or boost for a daily driver
I bought it like this so I'm not 100% on wheel specs but they seem to be 16x8, but I'm not sure on offset. Truck is actually at my buddy's place so I can do some work in his shop and I can't remember exact tire size, but I believe it is a 265/75R16. Wider than stock and slightly taller. I think I saw 2 other questions you had but maybe they got deleted or something. MPG has not been changed noticeably since the fuel enrichment change. I get about 10-12 mpg when empty no matter what and slightly less while towing lol. I know you said you were in CA, but I'm not sure if the fuel enrichment counts as tuning or not in terms of CARB issues. I'd Google performance shops around you and contact them to ask. The fuel enrichment is just allowing the engine to get full fuel when it wants it, it's not actually changing the tune MAP or anything, so I could see it going either way in CA. Better to ask the pros that tune for a living.
anything that increase load will mean less timing (towing, hauling, lift and tires) , but you'll still find gains, and you need them for the lift and tires
They detune the help out of these motors from the factory, if you wanted a true test to see how much power it makes to the wheel vs the factory tune. You would go off your first dyno pull before he done any adjustments.
Well yeah the first 2 runs it was stock and the second 2 runs he turned up the fuel enrichment, but that’s the only change he made besides removing the speed limiter. I did not have an actual full custom tune done.
@@TonyTheTruckGuy gotcha. Those are pretty impressive numbers for stock 6.0 I’d say that tourqe is pretty close to where it should be.. My Silverado made 257whp and like 248tq . But it’s a 5.3L with 4in cold air intake. Kooks headers with dual 3in exhaust. And that was after a full dyno tune. Then shortly after I cam swapped it and done converter and a couple small things it made 326whp and not sure on torque I forget. But that’s thru a 4l80 4x4. Next upgrade is gonna be Tfs 225 heads and maybe swap everything over to a 6.0 block eventually. But you would have incredible gains from a header & cam swap if your into those kinda mods. I would say you could gain north of 80whp & around 30 tq everywhere in the curve with headers and cam / tune. If you do your own work it’s well worth the money you will spend dollar per hp.
@@Smxsucks I had planned on doing a cam with boost, but unfortunately I think I’ll be selling the truck shortly as I just don’t have the use for it right now and could use the extra money.
@@Smxsucks Someday once I get a little land, I’d like to get another truck like this but a 2500 long bed, then do the cam/turbo setup. I’d probably leave it around 500 whp because it would be my tow pig just still fun I’m sure
For the steering wheel? Not sure exactly, I just grabbed it off the shelf at my local O’Reilly Auto Parts haha. Just checked their website quick and the only possible brand name I’m seeing is “Custom Accessories”. The part # on o’reilly site is 39781P
150 mph? Guy must want to see a driveshaft thrown out from under the truck! My L31 350 made 240 hp and 304 tq at the tires through a 4L80E and 10.5 14-bolt in 2nd gear.
1:1 ratio for true power numbers which is why we did it in 3rd. There’s a reason I replaced all 3 rear drive shaft u-joints and the carrier bearing before the dyno 😂 Not sure where you saw 150 though, as my max HP was made at 112 mph
@@TonyTheTruckGuy Did you not say the limiter was raised to 150 mph in the video? Its called critical speed and fairly easily calculated. Critical speed on a GM truck driveshaft is fairly low.
No, honestly I haven’t really towed anything with it yet since I got it, just hauled a few things around I’m the bed. It didn’t get an actual full tune, he just messed with that fuel enrichment. The difference is very small, but it’s there.
@@RC-mo8tl Per the dyno, about 30 hp and 60 tq, but it doesn’t feel like that much on the street. A full tune would likely do more though, especially if the trans gets tuned as well. This is a good starting point though.
So what you are saying is that when your truck came from this dyno it had 100 more crank hp then when it left the factory just buy putting a cold air intake well shiiii I'm gettin 6 of those look at your crank hp on the paper my God hahaah
Lmao yeah it really doesn’t make any sense to me. That’s why I’m not too hung up on the numbers. The important thing is using the same dyno before and after mods
The cateye silverados are truly the most beautiful trucks built by man. These year models are the last of a generation when men and women actually worked and put blood sweat & tears into their craft.
With the 1500 HD, you got yourself a rare one. Keep it, forever!
Thank you for the in depth detailed video! I’m about to take my 03 1500HD 4x4 with only 135k miles on it to the dyno in two weeks or so. The fuel enrichment god. So that explains why it feels like it’s “lugging” when you really want it to get up and go
I find that the best mod you can make to these older 4 speed trucks is a gear swap, look into a gear vendors you can run 5.13 gears and your highway rpms would be the same as the 4.10s without the gear vendors it's really cool stuff and really brings an old 4 speed up too par with the new trucks especially a 4L80 considering how long first gear is
But you can't have a 4x4 right? There is not enough space and you have to deal with the transfer case.
My 05 2500hd with an aluminium 6.0, shaved 243s, flat tops, tsp stage 3 low lift, tbss manifold, 30lb injectors, long tubes and full exhaust put down 308/314 on a mustanh dyno
I have 34" mud terrains and 20 inch wheels but wow, one of us has some wrong numbers.
I'm certain mine were skewed high for some reason, although I'm also certain that the 34" MT's are hurting you haha. Your numbers sound much more believable.
Your plate has GMT in it that’s really cool
Lmao, right? Funny thing is I never even found out about the whole GMT thing until maybe a year ago haha. Always just called them a cat eye or “angry headlight” style lol
Love the Parkway Drive intro! Lol!
Hell yeah 🤟🏼
i recently took my 2000 silverado 4.8 ext to get a dyno tune. I prevousily dyno it and i made 251 hp and 180 torque. after i got it tuned, just having a cold air intake it was able to push 287hp and 270 torque. keep it in mind i paid 400 for the tune and it had 230,950 miles on it.
Yeah man the 4.8 is great. 230k? Perfect for boost lol
@@TonyTheTruckGuy I was surprised and so was my tuner. Now I'm just want to run nitrous on it but I have no clue how much hp it can resist without having any issues
@@marco_zamudio3832 Haha yeah I can’t weigh in there, not much nitrous experience. Probably a 200 shot a few times though 😂
In reality it’s 230. Happy dyno
My thoughts also, but 100 hp is a huge difference lol.
Thanks for spoiling it😢
I have a 2017 Silverado 6.0 3500 and modified my tune with HP tuners. Dropped about 3 sec off 0-60 and I can now spin my 33s whenever I want.. worth it
It’s amazing how much throttle lag and torque reduction they have on the factory tunes haha
this is exactly what i was looking for i have a 2500hd 2001 lq4 6.0l with 33" tires and it runs pretty solid (very very good actually for 180k) so i would say its probably safe to say i would be close to the same power other then i have a brand new wix filter and dual muffler/exhaust but not strait pipe
Do you know your gear ratio?
@@TonyTheTruckGuy 4.10
i forgot that this would impact this
@@Thejohnnyoshow Not so much horsepower but you’d probably put down slightly more torque I was just curious
Our trucks are pretty much identical. Mine has a cutoff exhaust currently, thanks to a friend, but I have the stock filter.
Really makes me wonder what mine puts down. I tuned it myself via HP tuners, timings around 22-23 degrees with zero knock and timing adders zeroed out, added a ton of fuel (using a Wide Band to tune WOT) and have it dialed at 12.5 or .85 lambda at WOT, through a NV4500. It surprises me for being a 6500 lb truck.
Yeah unfortunately this truck will be getting sold to fund some other projects for now but I want another one some day to cam and turbo lol
The factory air box is actually more efficient than the so called cold (hot) air filter assembly.
@@vhp454 Yeah I wish it had the stock air box when I got it
Sweet truck i love these years.Those crank values are closer to 50% not 20%. But thats a good gain in power for some tuning. Makes me wanna take my 01hd in for a tune. But once i start searching for power its hard for me to stop. Lol.
It wasn’t even really a “tune”, he just removed the speed governor and turned up that “fuel enrichment” so the injectors would actually spray 100% when commanded. It’s still the stock tune file otherwise!
@@TonyTheTruckGuy oh shit eh. A tune woulda woke it right up
@@canamcartel9694 You would think haha
Gm has always low rated their hp numbers up until probably recently. It was notorious when you see the specs on the GNX and other vehicles after the 70s gas crisis. So it's not surprising if the 300hp flywheel being lower than actual hp
I’m just surprised it would be off by that much haha. It just sounds too good to be true, but I’ll take it.
@@TonyTheTruckGuy pretty sure they were rated 300 - 330hp 340 - 360 ft lbs
those corrected numbers have to be off because 303 x 1.20 assuming 20% loss is 363.6, but still very good for a stock motor
20% loss isnt a guarantee for all vehicles. Some may be 18 some may be 19 some may be 20…
Always cool to see 👍😁
Thanks for doing this video! I got the same truck. Was mpg improved?
Hard to say since I’ve never done an apples to apples MPG test. The thing seems to get like 11 mpg no matter what lol.
Did this affect your gas mileage? I mean, more fuel seems like it would be less mileage, but if you don’t need to mash the gas and wait for rpms it seems like it would help.
Didn’t seem to affect it from what I can tell. She’s always been thirsty haha. I get like 11 mpg no matter what.
Can u post or tell me exactly what he put your settings at so i can tell my tuner to do the same thanks man
Not sure exactly what all specific parameters he set, all I know is he used HP Tuners and went under the “power enrichment” tab and then changed the rpm at which it gives full fuel. That and removed my speed limiter.
Gets me excited to build my 6L, aiming for 450 whp and 450 w trq. gonna go with a TSP stage 2. have you cammed the truck yet?
No I’m spread thin on money right now so this project has unfortunately been paused. Would love a cam and low boost turbo combo though with similar wheel horsepower numbers to what you’re looking for.
what’s that squealing noise when i get to certain rps or whatever mine does that too could be what i got in the air box i’ve heard certain performance ones make that noise 😊
I’m not really hearing what you’re talking about but you may be just hearing the tire noise on the dyno rollers in the video.
Question for you. Do you still have that truck? I see you're from Minnesota. Wondering about the reliability of it. I'm actually looking at buying one same year.
I do! Needs some TLC that I have to address and might be selling it next year after that but this generation Silverado is my favorite. They have a few quirks like all vehicles, but overall very capable and dependable trucks without all of today's overly expensive electronics. The key is finding one
not rusted in half by now lol.
have you done the cam swap yet?
Negative. I've got some small stuff going on with the truck but mostly maintenance and cosmetic upgrades/repairs currently. Recently got a motorcycle and a cammed Pontiac G8, so money has been tight lol.
I have the 1500HD (2003)
but 2WD. With a level kit, do you think i can fit 33/12.50 M/T wrapped in 20x9 0 offset with no major rub issues?
Unfortunately for me, with the 2wd train my only options are level kit, 3 inch lift or the big 6 inch.
I think you will probably rub. My buddy had a 4x4 2001 Sierra with 2” level and his 33x11 all terrains rubbed his mud flaps on stock wheels. You’re going to be sticking out even farther with a wider tire and 2wd sits lower than 4x4. Even these tires on this truck rubbed on the front bumper lower balance before doing some trimming and they’re only like a 31.5 or 32” tall tire. Not sure on wheel specs though as these were on the truck when I bought it.
@@TonyTheTruckGuy I will most likely have to settle with the 6 inch lift then. I wish the 4 inch were available for 2wd, to save a bit of cash. I. definitely don't wanna worry about rubbing, and with M/t it would be bad even with a Norcal trim it seems. Thanks for your response! Hard to get a reply on youtube with Truck guys so big thanks, brother!
@@kozmicflush980 No problem man, I try to reply to every comment haha. Good luck!
Do you know what enrichment tuner chip he used or how he did I have the same truck and wanting to do it to mine
He used HP Tuners I’m pretty sure
@@TonyTheTruckGuy ok thank you!
@@dylanjones461 No problem, good luck!
Is there a video with cam installed and dyno pull ihope
Unfortunately not yet
@@TonyTheTruckGuy ok let me know when u do cause I just pick up a 2002 3/4 6.0 ls with 223000 miles on it yesterday and that going to happen or in (motor going in a half ton ) with cam or boost for a daily driver
What kind of size wheels and tires you have ???
I bought it like this so I'm not 100% on wheel specs but they seem to be 16x8, but I'm not sure on offset. Truck is actually at my buddy's place so I can do some work in his shop and I can't remember exact tire size, but I believe it is a 265/75R16. Wider than stock and slightly taller. I think I saw 2 other questions you had but maybe they got deleted or something. MPG has not been changed noticeably since the fuel enrichment change. I get about 10-12 mpg when empty no matter what and slightly less while towing lol. I know you said you were in CA, but I'm not sure if the fuel enrichment counts as tuning or not in terms of CARB issues. I'd Google performance shops around you and contact them to ask. The fuel enrichment is just allowing the engine to get full fuel when it wants it, it's not actually changing the tune MAP or anything, so I could see it going either way in CA. Better to ask the pros that tune for a living.
You're loosing MUCH more than 10-15% through that 4l80e
Apparently not since it put down more than it’s rated for 😂 Something doesn’t seem right though.
That 4L80e is as reliable as it gets though... gotta respect it.
20-25+ % loss I agree John S for automatics like a 4l80 or th400. The manual transmissions like t56s are in the 15% loss region.
Was wanting to get mine dyno tuned, but unsure seeing as I have 35s mud tires and a 6” lift.
Meh, go for it!
anything that increase load will mean less timing (towing, hauling, lift and tires) , but you'll still find gains, and you need them for the lift and tires
Did you dyno it with the new cam yet?
Not yet unfortunately, too busy with life and other projects lol
87 octane?
@@365AdventureCo. correct
So makes me wonder what he could do with a 2010 2500 burb being bumped up to 352hp or something from the factory
Yeah I’m not sure if that generation still had the fuel enrichment tuned way back or not
Those trucks only make 300hp to the tires after a tune on 33s
@@westcoast6162 I would have guessed less only a 52 horse loss through the drivetrain seems pretty good.
@@kevkayla11 yeah those 6l80-90. Kick ass hard too
Is the truck Diesel or Gasoline ??
6.0 gas V8
@@TonyTheTruckGuy Thanks I’m on the market to buy one but I was wondering if they were Diesel
@@Elcompajuanpablo They do make the same truck with a 6.6 diesel option
@@TonyTheTruckGuy What about the 2500HD?
@@Elcompajuanpablo Need to go 2500 or higher for the diesel, but they offer both the diesel and the gas in the 2500 as well.
They detune the help out of these motors from the factory, if you wanted a true test to see how much power it makes to the wheel vs the factory tune. You would go off your first dyno pull before he done any adjustments.
Well yeah the first 2 runs it was stock and the second 2 runs he turned up the fuel enrichment, but that’s the only change he made besides removing the speed limiter. I did not have an actual full custom tune done.
@@TonyTheTruckGuy gotcha. Those are pretty impressive numbers for stock 6.0 I’d say that tourqe is pretty close to where it should be.. My Silverado made 257whp and like 248tq . But it’s a 5.3L with 4in cold air intake. Kooks headers with dual 3in exhaust. And that was after a full dyno tune. Then shortly after I cam swapped it and done converter and a couple small things it made 326whp and not sure on torque I forget. But that’s thru a 4l80 4x4. Next upgrade is gonna be Tfs 225 heads and maybe swap everything over to a 6.0 block eventually. But you would have incredible gains from a header & cam swap if your into those kinda mods. I would say you could gain north of 80whp & around 30 tq everywhere in the curve with headers and cam / tune. If you do your own work it’s well worth the money you will spend dollar per hp.
@@Smxsucks I had planned on doing a cam with boost, but unfortunately I think I’ll be selling the truck shortly as I just don’t have the use for it right now and could use the extra money.
@@TonyTheTruckGuy ahh yea you would love it with boost. I have a 4x4 Rcsb 2001 model it makes 750whp and it’s so fun to drive
@@Smxsucks Someday once I get a little land, I’d like to get another truck like this but a 2500 long bed, then do the cam/turbo setup. I’d probably leave it around 500 whp because it would be my tow pig just still fun I’m sure
Can I install Duramax machine for GMC Yukon 2007
What is a Duramax machine?
What brand is that wheel cover?
For the steering wheel? Not sure exactly, I just grabbed it off the shelf at my local O’Reilly Auto Parts haha. Just checked their website quick and the only possible brand name I’m seeing is “Custom Accessories”. The part # on o’reilly site is 39781P
150 mph? Guy must want to see a driveshaft thrown out from under the truck!
My L31 350 made 240 hp and 304 tq at the tires through a 4L80E and 10.5 14-bolt in 2nd gear.
1:1 ratio for true power numbers which is why we did it in 3rd. There’s a reason I replaced all 3 rear drive shaft u-joints and the carrier bearing before the dyno 😂 Not sure where you saw 150 though, as my max HP was made at 112 mph
@@TonyTheTruckGuy Did you not say the limiter was raised to 150 mph in the video? Its called critical speed and fairly easily calculated. Critical speed on a GM truck driveshaft is fairly low.
@@chrisreynolds6520 I think he just lifted the limiter completely for me, which happens to be 150. We didn’t actually spin the tires that fast haha
Have you towed with it any since tuning? Any improvement?
No, honestly I haven’t really towed anything with it yet since I got it, just hauled a few things around I’m the bed. It didn’t get an actual full tune, he just messed with that fuel enrichment. The difference is very small, but it’s there.
@@TonyTheTruckGuy gotcha. I am gonna remove the PE and PE delay from mine, was wondering how big of a difference it makes.
@@RC-mo8tl Per the dyno, about 30 hp and 60 tq, but it doesn’t feel like that much on the street. A full tune would likely do more though, especially if the trans gets tuned as well. This is a good starting point though.
@@TonyTheTruckGuy good to know. I think a 60tq bump would really help me towing on the interstate.
@@RC-mo8tl Probably a little bit. Not sure how accurate the dyno numbers actually are, but in theory that’s a pretty good gain.
So what you are saying is that when your truck came from this dyno it had 100 more crank hp then when it left the factory just buy putting a cold air intake well shiiii I'm gettin 6 of those look at your crank hp on the paper my God hahaah
Lmao yeah it really doesn’t make any sense to me. That’s why I’m not too hung up on the numbers. The important thing is using the same dyno before and after mods
Where do we get magneride shocks from?
Mine doesn't have those but you can get OEM replacements from the dealer or aftermarket replacements online or local parts store.