Posting for a buddy. He has a 2003 malibu 6 cylinder. The fans are not kicking on causing it to overheat. He said he checked all the fuses and they are all good. Any ideas as to what would cause both fans to not turn on?
could be the fan motors, the sensor, the fan relay, or a wire harness issue. Do you have at a minimum a test light or voltmeter? Can you apply power directly to the motors to test them?