2000 GMC Jimmy Heater blowing a/c

2000 GMC JIMMY
113,000 MILES • 6 CYL • 4WD • AUTOMATIC
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BRADDOR25
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Everything is great with my 2000 Jimmy except for this one thing. When I turn my heater on, it is blowing a/c. The a/c is working fine but turning it over to heat i.e. defrosters and set on hot air it is blowing cold a/c.
May 30, 2008 at 10:06 PM
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replace the accuator that is in behind the glove box, it is a plastic gear and it breaks, same happened to mine and it works
Dec 19, 2010 at 10:34 PM