Question about 2003 GMC Envoy
I came home last night, shut my 2003 GMC Envoy off, took the key out of the ignition, got out and shut the door, and my heater was still running. It drained my battery in like 20 minutes. This morning I recharged the battery and started up the envoy. Shut it off and it did the same thing. I didn't even have the heater on??? I pulled out the fuse to the blower, I think, and it stopped. My envoy is running fine, but I need heat. I live in Minnesota!!!
I have the same problem. I have also been searching the web for a solution. I came across someone saying that it was the heater module located behind the glove department. I can't find now where i read this but it said the part was approx. $150.00. He was having same problem as us, heater wouldn't obey touch commands to turn on/off or when heater did blow it would only blow real low or real high. Like you, after turning off engine blower motor was still running even though it wasn't blowing air out.
I'm tired of paying for things that are not due to normal "wear and tear" on my 2003 Envoy. Let me know if this helps you and how you repaired it. I'll probably have to take mine to the shop but because I'm a "girl" I swear they think I'm crazy with all my Envoy complaints.
Posted on Dec 27, 2008
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Posted on Jan 02, 2017
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