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Old 10-07-2010, 01:34 PM   #1
GMC87
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Join Date: Aug 2010
Location: N.Canton, Ohio
Posts: 70
87 GMC heater problems

Does anyone have or know where I could find a diagram of the vacuum layout for the heat / AC system in my truck. I know I have a vacuum leak I can hear it but I cant seem to find it.

Truck is a 1987 GMC 3500 with AC.

Any help or direction would be appreciated
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