GMC Troubleshooting Questions? Ask a Mechanic for Answers
There is a recall for the blower resistor on your truck. If you'd like, I can provide you with a copy of that recall
Ok. These are for manual hvac. If you have automatic, let me know.
Sorry, I just noticed there is a TSB for your control module. I have attached it below.
Did the schematics show you what you were looking for or do you still need help?