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Old 03-16-2008, 06:31 PM
72chevelleOhio 72chevelleOhio is offline
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Re: Engine Revs and then slows, 95 Blazer 4.3

The A/C will cycle in defrost to help clear the windshield...
Some systems (not sure about yours in particular) will cycle when the charge is low, and some will cycle just to keep oil circulated in the system.
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