GMC Troubleshooting Questions? Ask a Mechanic for Answers
Hi, I'm Ron and I will be helping you today.Stand by for a moment while I prepare your answer.
The most common problem would be the motor itself, but you can confirm this with a bidirectional test with a scan tool, it will confirm whether it's the module or the motor.
The switch is another remote possibility too.
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Hi, I'm just following up with you to see if you have any more questions.Thanks, Ron