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2003 GMC Envoy Question: HEATER BLOWER NOT WORKING ON 1,2,3, SETTINGS, ONLY 4&5.

 

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HUBBLE1, 4.2L 6 Cylinder, Roscommon, MI, January 02, 2011, 13:53
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I HAVE BEEN TOLD IT'S THE SWITCH OR MOTOR RELAY OR RESISTOR. WHERE ARE THEY LOCATED ON THIS VEHICLE

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  • Answer #1

    dandd January 02, 2011, 15:45
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     Master

    There is a blower motor speed module which is located under the dash not far from the blower motor itself, just follow the wires from the motor.
    The switch is in the climate control head. Fastest way to tell what is defective is to scan the climate control computer and see if the switch is working, the data stream will display the switch, there may also be some codes in the climate control module for what is ailing your heater system. Most parts stores don't carry a climate control capable scanner, by the way.

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    HUBBLE1, January 03, 2011, 07:29
     Rookie

    THANK YOU VERY MUCH!

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