2005 Chevrolet Malibu Q&A
2005 Chevrolet Malibu Question: My car overheats in warm weather IF I'm driving slow and/or without A/C on.
I've had the thermostat changed and I think someone did something to the radiator or water pump a while ago, but so far, no fix has worked, or at least not for long. It only overheats in hot weather in stop and go driving or low speeds. If I put the A/C on, this fixes it. If I'm on the interstate going fast, the temp is generally stable, at least for shorter drives. I'm tired of paying people for fixes that don't fix the problem. - LisaPal
your fan may not be working propperly, when you turn on th A/C the computer turns the fan on continuously, when not running A/C it's controlled by a different circuit check all fan fuses and relays also have coolant temp sensor checked it maybe out of range...coolant level should be checked as well when engine is cold of course.. - Tbone1980
See Answer#1...you need to heat up vehicle and see if the cooling fan is operating. - csubak30