GMC Troubleshooting Questions? Ask a Mechanic for Answers
Hello my name is ***** ***** I can help.
Have you had it scanned for codes?
A code would help narrow the problem down.
Most auto part stores will scan it for free.
If you get it scanned you can come back and I can continue to help you
The most common code are for the Front end Impact Sensor. There is a left and right side mounted under the radiator support.
Just checking to see if you still need help?
Did you get it scanned?