My 2005 GMC Terrain Z-71 blower motors come on when you start it cold and won't shut off.
It will kill the battery after it sets.
I located the relays but don't know where the temp probe is on the vehicle.
Any help appreciated.
Don, if you have a Terrain with auto temp HVAC (you select the temp you want and the unit maintains that temp), your problem is in the motor speed control unit. When the FET transistor fails, the blower motor runs continuously.
The speed control module should be mounted very close to the blower motor, and most blower motors (although, I don't know about yours) are mounted behind the glove box.
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