I have a 98 grand prix that the vents does not switch like the suppose when I use my A/C but the perform just fine when using the heat


Asked by Nov 29, 2014 at 06:23 PM about the 1998 Pontiac Grand Prix 4 Dr GT Sedan

Question type: Maintenance & Repair

1 Answer

Tom Harmon

Sounds like the switch that has all the positions on it may have a vacuum blockage ( the rotary switch has multiple orifices that direct to vacuum to various actuators) Hard to repair but easy to replace ... cheap too ...Check Ebay

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