The air flow doors operate with vacuum from the engine. You may have a disconnected or damaged vacuum line under the hood.
in the Chevy Malibu forum
Changing the brake light relay switch on your 1999 Chevy Cavalier is quite easy. The brake light switch simply plugs in and out.
the brake switch is just above the pedal.they are usually white. when you depress the pedal it opens the switch and when you take your foot off the pedal it closes the switch.
Closing the door turns off interior lights on a 1997 Chevy S10 because there is a switch in the door jamb that closes when the door shuts. When the door opens, the switch opens.
The 2004 Chevrolet Impala air conditioning pressure switch can be found on the end of the air conditioner compressor. The pressure switch should be labeled as such.
My guess is the system is low on freon being 11 years old.
The 1992 Chevrolet Suburban air conditioner compressor relay switch can be found in the fuse box. The air conditioning compressor relay switch will be labeled as such.
Changing the brake light switch in your Chevrolet Monte Carlo is quite simple. The brake light switch simply plugs in and out.
The 2000 Chevrolet S 10 pickup truck air conditioning relay switch can be found in the fuse box. The relay switch will be in the third column.
Try changing the ignition switch located on the steering column
schematic of 1998 chevy lumina ltz 3.8l air conditioner
You have a contact switch that closes the circuit once the hood is closed (button switch) look for it, shoot some contact cleaner on it or replace it. it shouldn't be more than $5.