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Answered 2015-07-27 14:37:55

A small diameter vacuum tube that controls the vents becomes brittle and breaks. Open the hood and look for a tee connection behind a canister on the passenger side. This tube runs over the motor and connects to a port just to the right of the throttle body. You will need to remove the air intake cover to get to it. Takes 15 min. to replace. (Only if you do not have AC) The port has an elbow that you just won't have access to. (GM doesn't want the public fixing anything due to union design greed and corporate roll over, and they all wonder why they are history) Much easier than opening the dog house. Unless you have AC if so, hey change the plugs to 3 point ignition gap plugs and give it a new lease on life.

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