2004 Taho HVAC Modeul Calibration?
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CF Junior Member
Joined: Apr 2009
Posts: 47
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2004 Taho HVAC Modeul Calibration?
Looking to calibrate the HVAC actuators on my 2004 Tahoe. I don't have the scan tool. I've read that disconnecting the battery for a few minutes might do it? Also saw this scheme in the Uplander forum--don't think it works for Tahoes:
Alternate Method (w/o Scan Tool)
Clear all DTCs.
Place the ignition switch to the OFF position.
Connect all previously disconnected components.
With the Mode **** in the PANEL position, press and hold the AC button for 5 seconds.
Rotate the Mode **** fully counterclockwise.
Rotate the Mode **** fully clockwise.
Rotate the Mode **** fully counterclockwise.
Release the AC button.
Wait 40 seconds for the HVAC control module to self-calibrate.
Start the vehicle.
Verify that no DTCs have set as current DTCs.
Alternate Method (w/o Scan Tool)
Clear all DTCs.
Place the ignition switch to the OFF position.
Connect all previously disconnected components.
With the Mode **** in the PANEL position, press and hold the AC button for 5 seconds.
Rotate the Mode **** fully counterclockwise.
Rotate the Mode **** fully clockwise.
Rotate the Mode **** fully counterclockwise.
Release the AC button.
Wait 40 seconds for the HVAC control module to self-calibrate.
Start the vehicle.
Verify that no DTCs have set as current DTCs.
Thread Starter
CF Junior Member
Joined: Apr 2009
Posts: 47
Likes: 2
The HVAC actuator(s) behind the middle of the dash still go CLICK CLICK CLICK when both heat slides are all the way to the top (hot). It's annoying as hell. I have never been able to find a successful method to calibrate them. Anyone have any ideas? Thanks.
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