My 2004 GMC sierra will blow cold air for about a minute then it blows hot, even if I turn the blower off. What's wrong?

My 2004 GMC sierra will blow cold air for about a minute then it blows hot, even if I turn the blower off. What's wrong? 1 Answer

What's wrong with my 2007 GMC sierra 1 Answer

I have a 2007 GMC Sierra the transmission went out and I had to replace it in order to do that I had to cut the exsaust I put it back on but ever since it seems to have no power and misses I can b...

Heater in my 1992 GMC Sierra doesn't blow hot air. 3 Answers

The heater core is hot, and the doors all work but it will only blow out cold air. What is the problem? Thanks.

I replaced the blower motor in my 1996 GMC Sierra but it still doesn't work at all. 6 Answers

Air wasn't blowing in my truck at all, so I replaced the blower motor, but it still isn't blowing at all. I haven't bought a resistor for it cause I don't think that's the problem, what else could i...

1988 GMC Sierra air conditioner has no power at dashboard display, no blower, no heater. Checked the fuse dasand it is okay. Found a relay on firewall, but how can I tell if this is problem? 1 Answer

Checked the dashboard fuse and it is okay. Found a relay on firewall, but how can I tell if this is problem?