Where can I find wiring harness pinout information for an LS conversion?
Use our LS computer pinouts: P01 (0411), P59, E38 and E67 connector pinouts with wire colors and circuit numbers, set up for building or reworking a swap harness. Match the pinout to your exact computer and year before you move a pin: cavity assignments change between service numbers.
Last updated
Who this applies to
- Computers: P01 (0411), P59, E38, E67
- Engines: LS1, LS6, LM7, LQ4, LQ9, LH6, L92
- Transmissions: 4L60E, 4L80E, T56
- Not for: Gen V LT (E92) - different connectors and digital throttle communication
Gen III/Gen IV rework of a factory harness
- If you don't want to DIY, ship your stock harness to a modifier - Stage 1 modification is $325 and Stage 2 (A/C and fan wiring) is $400, with PCM programs starting at $175 $325-$400 plus $175 programming
Careful
- Never depin a PCM connector using a pinout from a different model year - cavity assignments change between service numbers
- Seal or plug connector cavities you depin; open cavities expose PCM pins to moisture and debris
Go deeper
Check this first
- Confirm connector style: red/blue (0411 P01) vs blue/green (P59) vs E38/E67 - pinouts are not interchangeable between them
How you know it's fixed
- Each sensor and injector connector mates to its correct sensor with the wire color matching the pinout
- PCM powers up, communicates through the DLC, and reads all sensors without codes after wiring
Key numbers
| What | Value |
|---|---|
| PCM programming price | from $175 |
Every option we know of
| Maker / product | Part # | Fits | Price | Where | Status / notes |
|---|---|---|---|---|---|
| Current Performance Wiring stock harness modification to standalone | LT1, LSx Gen 3/4, Gen V harnesses the user supplies | $325 Stage 1 / $400 Stage 2; PCM programs from $175 | currentperformance.com | In production programming (VATS/emissions removal) is extra and mandatory | |
| PSI (Performance Systems Integration) harness instruction manuals with pin tables (e.g. MAN-1019) | varies by application | per-application LS swap harnesses | not listed | psiconversion.com | In production none noted |
Prices are approximate as of September 2026. We list every option we know of, including small shops and used parts we can't link to. Confirm fitment with the seller.