I have an '05 Yukon XL SLT, yesterday I went to the store and noticed that when i turned the A/C off, the fan for the defrost kept running. When I got to the store and turned the truck off, the fan still ran. I was in the store for maybe 15 min. and when I came back out, the fan was...yeah you guessed it...still running. It will also blow hot air on the driver's side sometimes, no matter what the driver's side thermo is set to. The passenger's side works just fine, even when the driver's side is blowing hot air. I had a friend of mine tell me it sounded like a relay has lost it's ground, but I don't know where to begin, and I'm not looking to spend a ton of money. Any suggestions?
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