I own a GM Van 2007 and the battery is draining overnight, the battery is brand new, the alternator is new. The evap unit on air conditioning unit freezes is freezing up within 10 minutes of driving and the air conditioning is not being operated. In addition, the heater goes out within 10 minutes of driving. Does this have anything to do with a relay or a short in the system? These symptoms happen at the same time.
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