GM 3100/3800/3400 Simplified Wiring Harness
1996-2005 GM 3100 3400 3800 Simplified Wiring Harness
This simplified wiring harness is built for one thing: keeping your engine running while the rest of the car is falling apart. I’ve taken the factory 96-05 wiring and stripped it down to the absolute bare essentials so you aren't fighting electrical gremlins in the heat of a match.
Every inch of unnecessary wiring has been removed. No air bags, no ABS, no body modules—just the vital circuits needed to fire up and stay running. It’s a slimmed-down, rugged setup designed to get you through the tech line and keep you moving until the last hit.
The $200 Flat-Rate Service Includes:
Professional Simplification: All extra wiring stripped to minimize short-out risks.
Rugged Setup: Vital connections are kept high and away from the crunch zones.
Simple 2-Wire Hookup: Designed for a basic Key-On Power and Ground connection.
🛠 How It Works
To use this service, you must mail in your engine harness.
Required Info: I need to know whose ECM you are using when I build your harness (e.g., specific tuner or company) to ensure compatibility.
User Responsibilities: You will be responsible for hotwiring your own fuel pump and running your main battery power and grounds.
⏳ Turnaround Time
7-14 Days After Receiving: Once your harness arrives at our shop, it typically takes 7 to 14 business days to build, test, and ship your completed standalone harness back out.
One-Man Operation: Backwoods Racing is a dedicated one-man show. This ensures that every single harness gets the absolute highest attention to detail, quality control, and care—though high order volumes can occasionally affect timing. We appreciate your patience as we build it right.
🚫 Service Limitations
No Electric Throttle Bodies: Any 3800 engine that utilizes an electronic throttle body is not covered by this service.
Specific 3400s: The 96/97 3400 engines are not part of this service.
📦 Shipping Information
Ship your harness to:
12040 Dunn RD
Riley, MI 48041
Include your Name and Return Address inside the box with your harness.
US Domestic Shipping Only: This service is only available within the United States.
⚠️ Important: ECM Requirement
This simplified harness will not work with a stock ECM. Your computer must be tuned or have a VATS delete to run.
Need a Tune? I offer a combined service for this—please see my other listing: "Mail in your Harness and ECM" to get the full package.
⚠️ Derby Use Disclaimer
Off-Road Use Only: Not emissions-legal for street-driven vehicles.
Limited Liability: I am not responsible for engine damage, fire, or injury resulting from improper installation or the extreme conditions of derby competition.