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Might have a bad vacuum motor for one of the doors for the ducts. Most likely U have a Vacume leak @ the Vacume Canister or a bad Vac hose.The hoses are very small(about 1/8 or 3/16 inch)Some- times its a Actuator 4 the mixer doors but mstly its just a small Vacume leak.Check the hoses from the intake manifold to the fire-- wall,Thet T off & becme very small.

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โˆ™ 2004-12-09 17:15:12
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Q: What causes air to blow out the floor and defroster vents but not out the panel ac vents on a 1997 Buick LeSabre?
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