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View Full Version : Anyone used the GMPP Harness?

John510
03-20-2011, 11:44 AM
Im thinking of buying the GMPP controller kit for my engine. Question is, Does the harness have added length on the end to hide the ECM under the dash?
Bow Tie 67
03-20-2011, 01:58 PM
Yes but you will end up with a rather large hole to feed all the wiring through. I cut the relay center off mine and wired it into my body harness. I was able to do this since my car is wired with a 4th gen body and under hood harness. It was a ton of work, but worth it.
John510
03-20-2011, 03:53 PM
Is it easier to just use an aftermarket conversion harness? I have one from PSI for my LS1 that I can trade for the LS3 I need.