GMC Troubleshooting Questions? Ask a Mechanic for Answers
So you suspect that you have a bad ground causing the vehicle to enter reduced power mode? Are you getting any trouble codes? There are a number of grounds on this vehicle (depending on which engine option you have), any trouble codes that are stored might give us an idea which grounds to look at.
I can't find one diagram that shows all of the grounds (there are quite a few on this truck) but here are the grounds that control most of the engine and powertrain components:
Please let me know if you need any additional diagrams. It's safe to assume you aren't interested in turn signal, and other lighting system grounds?
Did you need any additional help with your vehicle? Please don't forge to rate if I have been of some assistance.
Ok. Let me know if you need help.
I just wanted to check and see if you need additional help with this. If not please don't forget to rate.