What GM harness modifications are covered in the E39 LS wiring thread?
Here is what the documentation says. Each point links to its source; details depend on your exact computer, harness and transmission.
- 0411 PCM (GM service #9354896 or 12200411); 1999-2007 Vortec DBC (LM4/LM7/LQ4/LQ9/L33/L59); T56 or non-electronic automatic: HAR-1019 deletes EGR, AIR, CCP and rear O2 wiring. (PSI Conversion)
- Gen III PCM; Aeroflow AF49-1505; LS1/LS6; DBC; 4L60E/4L80E: AF49-1505 engine section retains injectors, coils, sensors and transmission wiring. (Aeroflow Performance)
- 0411/P59 factory harness strip-down: DIY harness stripping: depin unused circuits and plug empty cavities. (LSX Magazine)
Confirm against the instructions for your exact parts before wiring. More: Harness and power in our tuning guide.
Confidence: medium — sources disagree or are limited; check the sources below.
Community discussion
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Sources
- https://es.slideshare.net/slideshow/har-1019-vortec-swap-wiring-harness-instructions-efi-conversion-fro/47382494 — PSI Conversion
- https://aeroflowperformance.com/pub/media/Instructions_PDF/AF49-1505.pdf — Aeroflow Performance
- https://www.lsxmag.com/tech-stories/diy-or-buy-a-look-at-the-ls-standalone-harness-dilemma/ — LSX Magazine