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Free online wiring diagrams

126K views 24 replies 21 participants last post by  jacobNya 
#1 ·
Can be limited on some stuff, but better than what you find Googling :lol:

This site has been around for years, and is updated regularly.

**Disclaimer** This is not my site, so I have no control over what is on there.

http://www.revbase.com/BBBMotor/Wd
 
#4 ·
The diagrams don't have any indexing; the pages don't tell you what it's
for. They're raw diagrams with no indication as to what circuit you are looking at.
Like, I have the push button for the outside bed lights. There is a harness
there with EIGHT wires going into it, and it's ONE button. Finding that means
looking through every diagram till you find it, because the top of each page
doesn't tell you what you're looking at.
 
#5 ·
Still using this resource on the regular
 
#14 ·
The GM wiring diagrams for 1967-1994 trucks were scanned and posted to a couple other forums that cater to those older trucks. Those years Silverado and Sierra were trim levels not models.

Mitchell has newer wiring diagrams but they aren't always 100% complete or absolutely correct.
If you intend to keep the truck for a while I'd look for copies of the GM service manuals.
They are pretty pricey new and used for the T800 & T900 chassis.
I'm not sure you can even buy GM service lit on paper for the K2 & T1 chassis.
 
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