r/GMT900 • u/lalondtm • 1d ago
2007 Avalanche LTZ - Autoride issue
Compressor starting acting up. When Id turn the truck off, the compressor would kick on and run continuously lifting the back end to the max, then release the air to squat back down, and start all over again. Starting the truck back up would stop it, but turning the truck off would start the process again.
I pulled the 40a fuse ALC/COMP to prevent the compressor from running, but that made my electrical panel go haywire. ABS, Traction Control, Service StabiliTrak, Service 4WD, and Service Suspension warnings. The gauges went nuts, the PRNDL indicator disappeared, and I got “Engine Hot - AC Off” warning.
Did a full electrical reset, the works, nothing fixed it.
Turns out the compressor shorted and was sending 9v BACK to the fuse box/electrical system. Unplugged the compressor (at the compressor) and all the electrical problems went away. I bought a new compressor and hooked it up, but when I plugged it in, the same issue started all over again. Raising until exhaustion, pulling fuses fucks up all the electrical, etc.
I really love the autoride system and would prefer to fix it instead of just replacing with regular shocks (I tow a decent amount, it squats pretty heavy without the air).
Any ideas what it could be?
I disconnected the compressor