GM Repair Problems? Ask GM Repair Expert Now.
Hi and thank you for the question request. My name is ***** ***** I'll do my best to help. What is the issue your vehicle is having? As far as I understood, the blower fan only works on high, correct?
Ok, thanks. With the blower only working on high, we know the high blower relay and the blower itself are operating as designed. The blower resistor controls all other speeds. Replace the resistor (and the connector if there are any signs of overheating or melting) and your blower motor will work on all speeds. I hope this helps. Anything I can help you with?