HPI Performance Tech Center — LS3 6L90E harness
LS3 6L80E and 6L90E Swap Wiring: ECM, TCM, Pedal and Harness Requirements
Posted by High Performance Injectors on
Plan an LS3 swap with a 6L80E or 6L90E by matching the ECM, internal transmission controller, accelerator pedal, throttle body, harness and calibration.