99 Chevy Silverado 1500 Service 4WD Light☺ Fixed☺

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The issue was fixed by replacing the Transfer
Control Module & the 4wd switch.
I only spent $97
These are the steps that I took to diagnose the problem:
( remember , start with the easiest )
1-Checking the Ground wire.
2-Checking the fuses
3-checking the Module and switch.
if all those things are ok, and the switch is stuck on
2HI or 4wd than it may be the Transfer Case Shift Motor .
I hope this video will be useful to some people.
and Good luck
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Cardone 73-42104 Remanufactured Transfer Case Control Module amzn.to/2WyvYLg
4WD 4x4 Switch - Replaces 19168767, 15709327, 901062 - Compatible with Chevy, GMC, Cadillac Vehicles - Silverado 1500, 2500HD Suburban, Avalanche, Sierra, Yukon - 1999-2002 - 4 Wheel Drive Selector amzn.to/2Yb3yHA
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[@LightOverdoZ]

If you believe that this video was useful and helpful to you, please consider donating to the channel to support and motivate me for more contents.
Your donations and support are appreciated : paypal.me/Lightoverdoz
$1 or $2 from you can make a difference 🦾🌹
Thanks for watching.

[@noelrivas9548]

Good video I followed the introductions and I could tell it was the fuse, thank you !!

[@TamFitz]

another vid said to remove battery cable while installing tccm and plug in the four pronged plug last . great video thank you

[@terryhollingsworth]

Yes, I read that the battery should be disconnected.

[@samhdalton]

Mine was the atc fuse. This helped a lot thank you. And happy 420

[@LightOverdoZ]

Glad it helped 🙂

[@sean.g4516]

Where is it located?

[@edwingonzalez7882]

Thanks

[@LightOverdoZ]

Ur welcome

[@flackanator1]

Well done

[@LightOverdoZ]

I hope the video was helpful

[@tylerhanson]

My light on auto 4wd stays on and it says service 4wd. Feels like im stuck in 4wd cant tell which gear

[@krcoutdoors4566]

When you first stared the truck would the lights on the switch come on and then go off ?

[@LightOverdoZ]

In my case it was no lights on the switch because it was not functioning and I had to replace it as well

[@krcoutdoors4566]

Light OverdoZ I disconnected my battery over night and now it’s working fine. But idk when it’ll do it again

[@LightOverdoZ]

@@krcoutdoors4566 check your ground wire

[@krcoutdoors4566]

Light OverdoZ I did the problem happened again but this time it went in neutral and now won’t shift into 4high or low

[@LightOverdoZ]

@@krcoutdoors4566 that sounds like the control Module...but before doing anything ,get a wire brush or a grinder and clean where the ground wire goes...sometimes rust and dirt infect the function

[@NoRelixYT]

Is it diesel or gas

[@LightOverdoZ]

Gas

[@seannicks28]

Dude not a 99 WTF

[@LightOverdoZ]

1999 you were not born yet I guess :D

[@jasonmiller4019]

99 has 2 body styles same as 2000 one Obs one nbs