Your car needs a tune up or need a new engine. The air condition puts load on your engine and if it stalls then it needs a tune up.
dude find a camaro forum and go into detail in what you did and ask there cause with the gobs of info we have I'm just gonna throw it out there and say its the flux capacitor
check the o2 sensor
Turn a couple screws on the carberator; set up the "idle".
yes
bypass valve not opening
you have a bad heater core
no the camaro wheels are 5x4.75 and the truck is 5x5. so they wont fit
check these in order, thermostat,heater coil,water pump,oil pump and main crank bearings.
1990 gmc p/u 5.7 wont idle showing code 12
motor on flap or switch at peadle
Mine started right up.... Are you sure you are not talking about my Suburban?
Check the 92 Camaro neutral safety switch next. If the switch is faulty then the starter will not get power to start the engine.