Question about 1993 GMC Suburban
This 92 k 1500 I just bought is in excellent shape, with 125,000 and only 65,000 on the motor. Due to the low miles and under usage, the defrost door inside the venting system does not seem to open. I switched the controls from defrost to dash to floor, that worked fine. It switches to defrost but it seems like the air only hisses like some thing didn't open and the air seems blocked, only in the defrost position.
Sounds like you have a vaccum leak or a blockage in the blend door area of the HVAC system most of the doors are controlled by vacuum if not by vacuum on of the servo motors that control the blend door is not functuning properly. Hopr this is helpfull
Posted on Jan 17, 2009
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Posted on Jan 02, 2017
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