T56 4L80E Swap Harness for LS1 Vortec (2003–2007)

Includes:
- Swap Harness for LS1 Vortec T56 4L80E

Fits Models:
- Chevrolet Silverado 1500, Chevrolet Silverado 2500HD, Chevrolet Silverado 3500HD, GMC Sierra 1500, GMC Sierra 2500HD, GMC Sierra 3500HD

Model Years:
- 2003–2007

Submodels:
- Common trims include WT (Work Truck), LS, LT, and LTZ. Chassis codes include GMT800 for Silverado and Sierra. Body styles include Regular Cab, Extended Cab, and Crew Cab.

Engine Options:
- Common engine sizes include 4.8L V8, 5.3L V8, and 6.0L V8. Engine codes may include LM7, L59, and LQ4.

Description:
This swap harness is designed for integrating an LS1 engine with a Vortec T56 transmission and 4L80E automatic transmission in compatible Chevrolet and GMC trucks from 2003 to 2007. It simplifies the wiring process for a seamless engine swap.

Features:
- Direct fit for LS1 engine swaps
- Compatible with T56 and 4L80E transmissions
- Simplifies wiring connections
- Durable construction for reliability
- Designed for specific Chevrolet and GMC mode