2003–2004 LS Demolition Derby Tuned ECM (Green/Blue)

A Full-Survival Derby Calibration for the 4.8L, 5.3L, and 6.0L LS

Price: $200 | Complete Plug-and-Play P59 Controller

The Setup

Built for the arena—this isn’t a street tune. This is a full Demolition Derby Calibration specifically for the 2003–2004 Green/Blue connector P59 ECM. I’ve engineered this setup to keep your LS engine screaming long after the radiator is gone. It’s designed to survive extreme heat and stay out of "limp mode" when the pressure is on and the hits are getting heavy.

Derby-Specific Performance Adjustments

I’ve overhauled the P59 logic to prioritize engine survival and raw power:

• Coolant & Heat Management: Calibrated to run longer and harder while hot. I’ve modified the logic to stop the computer from pulling power when things get toasty.

• Brake Torque Management Disabled: No more "power cutting" when you’re trying to push a car while holding the brakes.

• Optimized Shifting: Firmer, faster shifts to ensure you’re always in the right gear for the next hit.

• Knock Sensors Removed: All knock logic is ignored so the computer won't retard your timing due to the vibrations and metal-on-metal noise of the derby.

• Instant Throttle Response: Meticulously adjusted for that instant "snap" the moment you floor the pedal.

• Security & Codes: VATS is completely disabled and all unnecessary "junk" codes are removed.

Compatibility & Shipping

Supported Service Numbers: This product covers the common P59 ECM part numbers:

• 12576106 

• 12581567 

• 12586243 

• 12589462

Models Covered (2003–2004): Direct fit for 4.8L, 5.3L, and 6.0L engines in:

• Chevrolet: Silverado, Tahoe, Suburban, Avalanche

• GMC: Sierra, Yukon, Yukon XL

• Cadillac: Escalade

⚠️ Required Information:

Please include these in your order notes so I can dial in your tune:

1. Throttle Type: Are you running a Cable (DBC) or Electronic (DBW) pedal?

2. Engine Size: (4.8L, 5.3L, or 6.0L)

3. Tire Height & Gear Ratio: (e.g., 31" tires, 3.73 gears)

The Details:

• Ready to Ship: This is a complete ECM provided by Backwoods Racing—no core required.

• Shipping: Domestic (USA) Only.

⚠️ Disclaimer: Off-Road Use Only. Not emissions-legal for street-driven vehicles. Backwoods Racing is not responsible for engine damage, fire, or injury resulting from the extreme conditions of competition.