Question:

2004 gmc sierra stuck on defrost

by Guest11846128  |  2 years, 4 month(s) ago

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I've recently changed the battery the air vents worked properly before.

 Tags: 2004, Defrost, GMC, Sierra, stuck

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  1. Ali Abdullah
    Hi, Try this actuator recalibration procedure...... Remove the HVAC/ECAS fuse for a minimum of 10 seconds. Install the HVAC/ECAS fuse. Start the vehicle. Wait 40 seconds for the HVAC control module to self-calibrate Try this..... it SHOULD work Good Luck

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