Question about 2003 GMC Envoy

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Front vents don't want to blow air - new battery

A/C problem 2003 Envoy

Air conditioning seems to work but will not blow any air out the front vents.

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  • Anonymous Nov 16, 2008

    same issue. Unit seems to stay on after veh is shut off, runs battery down!

  • Anonymous Apr 10, 2009

    front vents don´t blow air. bottom vents and defrost vents work

  • rabbit904 Apr 15, 2009

    I have the same problem, system in default(?), and only blows out on defrost/defog.

  • dcart207 Apr 26, 2009

    i have the same problem it happened around the time when the fan continued to blow even when the vehicle was turned off.

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Changing the blower motor resistor will solve the problem of the unchanging fan speeds and the blower motor having power when the ignition is turned to the off position. Beware that there are three different kinds of blower motor resistors. There is a manual, automatic, and a digital that in appearance is greatly different from the first two. The blower motor resistor is located on the passenger side below and behind the glove box. The kick-plate under the glove box will need to be removed by two screws and wha-la, behold is the motor and resistor.

Posted on Oct 14, 2009

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2003 GMC A/C in default not blowing out the front vents. My problem happened because I disconnected the battery. I have finally pulled enough information off the web. I replaced the mode door actuator ($40), disconnected battery, held cables together for 1 minute, closed doors, started engine,and did not touch anything for 3 minutes ( 1 minute min.). System cleared DTC'S and I HAVE AIR OUT FRONT VENTS. New actuator has stops in it to prevent damage to it when/if the module goes into default. I now need to go see the general to have the HVAC module updated because of the home postion malfunction (It can't break the mode act. but the rest maybe next).

Posted on Apr 25, 2009

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1 Answer

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1 Answer

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