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Free wiring diagrams

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123K views 39 replies 17 participants last post by  Ron Nielson  
#1 · (Edited)
(Still working as of October 2025)

I got tired of people asking me for wiring diagrams.

So here it is.

Go to Chiton website by clicking here - Gale Chiton
The Login ID is 1111720867310

The only way to access the site is by clicking on that link. You will not be able to find it by searching on google for it.
And no there's no way to change the password, so don't even try.

It doesn't have all the information for newer model trucks, but the basics like wiring diagrams is there.
They recently added Allision tear down procedure for 06 and 2010 trucks so that says a lot.
I use to use it back in the day, until I started working on DTNA's finest trucks. :ROFLMAO:

It supports up to 2020, but Shopkeypro (which is what I use) isn't any different and doesn't show you any information above 2022 model years.
Last time I gave out Alldata logins, people changed the password like idiots not realizing I was the main account owner that set up shop profiles.

Enjoy.

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#6 ·
Those are the logistic diagrams that describe where the wires start and end. Basically a simplified roadmap of the signal path. Does not show how the actual wires are routed though.

here is an example from a 2023 showing the defroster circuit: Sorry that it's turned, but that is how it is in the book.
Image


Right hand side of the page, pick year from under light duty (3500 and down). Body Builder Manuals - GM Upfitter
 
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#9 · (Edited)
Those are the logistic diagrams that describe where the wires start and end. Basically a simplified roadmap of the signal path. Does not show how the actual wires are routed though.

here is an example from a 2023 showing the defroster circuit: Sorry that it's turned, but that is how it is in the book.
View attachment 1122315

Right hand side of the page, pick year from under light duty (3500 and down). Body Builder Manuals - GM Upfitter
I don't understand what your trying to show. The picture you posted isn't any different from the one you get using Alldata or shopkeypro. Besides, using GM upfitter isn't practical and is mainly used for incomplete chassis vehicles. Besides the login I provided isn't just for wiring diagrams. It's can be used for diagnostic procedures, harness routing, fuel systems diag, R&R. List goes on.
 
#7 ·
Thanks. I am familiar with the diagrams but not that particular term for them. I would call them 'logical', not physical. In any case, I now understand.
 
#11 ·
Absolute lifesaver. I've been accustomed to using Identifix for wiring and power distribution diagrams and these look very similar, much easier and more intuitive to read for me and gives me confidence they'll be right!
 
#16 ·
#18 ·
I need a diagram for a 2019 gmc sierra 3500 duramax on how the right rear window switch would interconnect with the BCM and with the driver window switch.

My right rear window isnt working from the driver door or from the right rear door.
I went to the chilton site and managed to figure out connector end views but I just couldn't figure out how to find the coirrect diagrams.

Thanks in advance for the information.
 
#25 ·
WOW.....this is by far the best link and layout I've seen in the past two days of searching for what I'm looking for! This is no question a keeper...and I will for sure be using it! HOWEVER! >

I'm going to chalk this to an Operator Error... the layout is so good cuz you just go to the "name" of what U are looking for and presto...awesome info........THE PROBLEM ...

I don't know the NAME of what I'm looking for??? I know it's NOT fuse box, or fuse panel, or fuse wires... It's "CONNECTORS under Fuse block"....no such thing....so to me it's Mystery Connectors!

Please look at this video......go to picture frame 2:20 he's pointing at these two fat connectors. Mine one is in pink tape on the left......the other one on my right is forresent green tape...what are these connectors for? specially the pink wrapped one! on the left?

How to Diagnose a Common Problem in GM Truck Fuse Boxes - YouTube

Again Ron..........GREAT GREAT LINK !! I just don't know the name of the connectors so that I can figure the rest out!
 
#26 ·
Originally, I thought you were talking about connector(s) attached to the fuse bock on the underside, but you are not. Those are other cables going who knows where. Sorry I couldn't provide your answer.
 
#28 ·
WOW.....this is by far the best link and layout I've seen in the past two days of searching for what I'm looking for! This is no question a keeper...and I will for sure be using it! HOWEVER! >

I'm going to chalk this to an Operator Error... the layout is so good cuz you just go to the "name" of what U are looking for and presto...awesome info........THE PROBLEM ...

I don't know the NAME of what I'm looking for??? I know it's NOT fuse box, or fuse panel, or fuse wires... It's "CONNECTORS under Fuse block"....no such thing....so to me it's Mystery Connectors!

Please look at this video......go to picture frame 2:20 he's pointing at these two fat connectors. Mine one is in pink tape on the left......the other one on my right is forresent green tape...what are these connectors for? specially the pink wrapped one! on the left?

How to Diagnose a Common Problem in GM Truck Fuse Boxes - YouTube

Again Ron..........GREAT GREAT LINK !! I just don't know the name of the connectors so that I can figure the rest out!
Splice pack or Multiple Junction Connector
 
#30 · (Edited)
Thank you for the link. WOW what a lot to learn and sort through. Is there list or table to explain all the acronyms such as TBC BATT fuse? What is TBC? I've figured out BCM as body control module but are they for and there seem to be many. Where to find them? I have issues with no over head interior light, no back up lights. (2007 chev 2500 HD with a diesel engine)

Thanks
 
#31 ·
Thank you for the link. WOW what a lot to learn and sort through. Is there list or table to explain all the acronyms such as TBC BATT fuse? What is TBC? I've figured out BCM as body control module but are they for and there seem to be many. Where to find them? I have issues with no over herd interior light, no back up lights. (2007 chev 2500 HD with a diesel engine)

Thanks
It pains me to even say this, but AI apps like Grok and Chatgpt are very helpful tools for questions like this. They do a good job summarizing available information in a way anyone can understand.
 
#37 ·