Hot air not blowing (only some cold air) at defrost. Controls wont change cold to hot air OR fro...
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2004 GMC Sierra 2500 HD, 6.0L V8, Visitor, Phoenix, AZ, May 10, 2010, 10:05
A couple of weeks ago my 2004 GMC 2500hd started misfireing while driving. I took it to a GMC ser...