The air not coming out of vents but it's turned on and blowing

Asked by Nov 15, 2015 at 03:23 PM about the 1999 Pontiac Grand Prix 4 Dr GT Sedan

Question type: Maintenance & Repair

3 Answers

Vent duct

70,955

Check the ductwork behind the dash (easier said then done) sounds like one of the ducts has come unhooked. HTH. -Jim

135

Check the vaccuum lines as well. The main one should run over the right wheel well in the engine compartment. It goes to a block behind the glovebox where it splits off into 4 colored lines that go to the diaphrams that contol your vent doors. It's tedious but much cheaper that having diagnostics run on the system. I use a small piece of paper to check for vaccuum because it's so little it's hard to feel with your finger.

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