RepairPal's independent, master mechanics track down the best of the best in auto repair. Learn more »
Get the latest advice about your car
The driver side temperature control works on both heat & ac. The passesnger side on works on heat no matter what the temperature is set on.
Sounds like you have a blend door issue.
SAF-T Auto Centers
Wallingford, CT 06492
Common Problems > Pontiac Bonneville