GMC Troubleshooting Questions? Ask a Mechanic for Answers
Hello, my name is ***** ***** I am a professional here at Justanswer. Thank you for your question and I will assist you with your concern.In order to determine what is failing with your lift gate the first thing your going to need to do is scan the system with a full scan tool and retrieve the B code that should be setting when the gate failed. Are you able to do this?
Unfortunately with out know the fault code anything I post would be a guess at best. If you can get the scan done I can help you with this.