1. The a/c system may be low on freon because on R134a systems being just a couple of ounces low can cause this..
2. The evaporator may be restricted, if so then it will need to be replaced..
3. In side a/c - heater control doors are leaking and or not working correctly..
This happened on my 02 Grand Prix. There is a switch that needs to be replaced, be prepared to pay about 200 bucks
Temp blend door actuator malfunction.
get a new car. or better a new air con stupid
My mom had the same problem and we added freon and it blows very cold all over now.
Usually located on the accumulator at the rear of engine compartment on passenger side
under the dash on passenger side behind glove box on the right side
how do you remove a driverside airbag from a 1999 grand prix
MY WIFE TOLD ME: THAT HAPPENS WHEN THE AC SYSTEM IS LOW IN REFRIGERANT, (IF SHE SAYS THAT , IT'S TRUE )
drivers side, bottom inside (engine side) corner. Tricky to reach for, a pliers helps get it started.
pass side strut tower
Try a glass shop
1" Square device with electric plug attached left side of radiator. Replacement is about $50.00