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Old 01-28-2004, 09:17 PM   #1
westcasey
Registered User
 
Join Date: Jan 2004
Location: kansas
Posts: 49
Angry '87 GMC heating problem

My heater is blowing lukewarm air most of the time. Not even warm enough to defrost the windshield. It will blow hot sometimes, then maybe 10sec. later will be lukewarm again. I put a new thermostat in and that didn't help so I got another one and installed it thinking the first one may have been faulty. Still no luck. Anyone have any advice???????
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1987 GMC 1500 5.7L
1985 Chevy 3/4 4X4
2001 Chevy 2500 HD 4X4
2007 Chevy 3500 Duramax 4X4
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