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Ask TODD RUZICKA Your Own Question
Category: GM
Satisfied Customers: 54
Experience:  Service Consultant at Main Motor Chevrolet
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I have teh exact same problem as the blog im reading, 2004

Customer Question

I have teh exact same problem as the blog im reading
JA: What is the model/year of your GM?
Customer: 2004 GMC Envoy
JA: Are you fixing your Envoy yourself? What have you tried so far?
Customer: Myself Replaced the Thermal control panal as I thought the selector was bad becuase it only blows on 5
JA: Anything else you want the mechanic to know before I connect you?
Customer: According to what I read I need the Blower Resistor
Submitted: 9 months ago.
Category: GM
Expert:  TODD RUZICKA replied 9 months ago.

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?

Customer: replied 9 months ago.
that is correct the blower on works on 5
Expert:  TODD RUZICKA replied 9 months ago.

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?