Standalone bench harness for LS Gen 3 P01, P59 & P04 ECM/PCM programming and flashing off the vehicle. Works with your OBD-II interface. Shop-grade build.

Standalone bench harness for programming and flashing LS Gen 3 GM engine computers — P01, P59, and P04 ECM/PCM — off the vehicle. Power the module and communicate with it on your bench instead of fighting it in the car. Works with your own OBD-II interface — no additional flasher required.

What it's for:

- Bench flashing and reading P01 / P59 / P04 ECM/PCM

- Off-vehicle programming for swaps, recovery, and spare modules

- LS1 ECM and Gen 3 PCM configurations

Built shop-grade for repeated use. Plug in your OBD-II tuning interface (HP Tuners, etc.) and go.

New to bench flashing? See our step-by-step guide: How to Bench Flash a GM P59 PCM (/how-to-bench-flash-gm-p59-pcm). Building your own setup? Reference the P01/P59 pinout (/p01-p04-p06-p08-p59-e54-bench-harness).

Need it done for you instead? Mail us your module and we'll flash it — /quote