on your car it is a defalt mode for air to blow out defrost when there is no vacumn from the engine so you should look for a broken vacum line or see if it has come unplugged on the engine.
how to replace a radiator in a 1996 buick regal
where is temperature switch on 1996 buick regal
Google 1996 Buick Regal Custom and see.
how to replace master cylinder on 1996 buick regal
Yes
R134a
R134a
A free vacuum diagram for a 1996 Buick Regal can be found in its manual. It can also be obtained at an auto part store, as a print off.
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With proper maintenance probably forever
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A 1996 Buick Regal will jump start using a portable battery pack. Another person can also use jumper cables to help jump start another car.