kenracer

iTrader: (3)

Does anyone have or know where to get a harness for Ls1 based engines for G-body. It needs to make all the dash and electrics work.

G-Body

iTrader: (4)

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.

screaminChick-n

use a standalone harness for the LS1 engine. use the stock senders and wiring for the stock gauges. Find places for the mech senders on the LS1 engine.

Monte_LS3

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.

Chris_SLPNElky

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

doober1

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.).