G-body wiring
G-body wiring 
Joined: Sep 2004
Posts: 3,148
Likes: 12
From: Downers Grove, IL
I don`t think anyone offers a plug and play harness. Speartech and wait4meperformance can re-work a factory harness but you would still have to connect up a few wires.
Or you can do like I did an re-work the factory harness. What year/bodystyle/engine is your G-Body? I might have all the info you need already.
Or you can do like I did an re-work the factory harness. What year/bodystyle/engine is your G-Body? I might have all the info you need already.
Teching In
Joined: Feb 2008
Posts: 48
Likes: 2
I'm working on an 85 Monte SS right now w/ Gen IV crate engine and gm harness/controller... Finishing the interface wiring between Monte Engine harness and controller.....if you have specific questions, post them....its fresh in my mind right now.
Teching In
Joined: May 2009
Posts: 5
Likes: 0
I'm tryin to get a '86 Chevy Elcamino up and goin with a '03 5.3L/4l60trans trk combo. I have all of the acc. and the wiring harness. Will I have to join the two harnesses to get everything from dash gauges and lights to electric fans to work right.
Thanks, Chris
Thanks, Chris
Teching In
Joined: Feb 2007
Posts: 7
Likes: 0
You likely won't use much of the stock G-Body harness, just keyed power, and the wiring from the sending units to the gauges (oil pressure & water temp)... far as all that goes you could just use those 3 wires, but you'll also need the wiring to power the rest of the car (interior lighting, power to the column, headlight switch, wipers if you use them, etc.).
