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Thread: A/C blower fan
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05-03-2014, 05:14 PM #1
- Join Date
- May 2014
- Location
- USA
- Posts
- 10
Black- 2002 Tahoe
A/C blower fan
Mechanic y disconnect the battery terminals to replace the transmission and after I got the truck A/C blower fan dosent blow from front only from top windshield I heard A/C system need to be programmed?
because was working ok after replacing transmission my A/C blower works and cold but docent blow from front vents and I am hearing the vents keep moving only blow from top windshield any idea?please
I checked maybe vacuum hose but mine docent have vacuum hose works with electronic .
please any help?
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05-03-2014, 06:26 PM #2
- Join Date
- Apr 2008
- Location
- Madison, WI
- Posts
- 7,006
1999 Formula WS6 M6-sold- 2001 Silverado Z71
Actuator Recalibration
The HVAC control module will relearn the actuator limits whenever power is disconnected and re-connected to the module.
Use the following steps to perform the calibration update:
1. Turn OFF the ignition.
2. Remove the battery positive voltage circuit fuse of the HVAC Control Module or disconnect the battery negative cable.
Important: The scan tool must be disconnected from the vehicle to properly perform the calibration procedure. If a scan tool is connected before this procedure is completed, then new calibration values will not be stored.
Important: Failure to wait 60 seconds will not allow the HVAC control module sufficient time to clear the old calibration values.
3. Wait 60 seconds.
4. Install the fuse or reconnect the battery
5. Turn ON the ignition.
6. Wait 60 seconds before touching any buttons on the HVAC control. You may hear the actuators cycling as they recalibrate.
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05-04-2014, 05:58 PM #3
- Join Date
- May 2014
- Location
- USA
- Posts
- 10
Black- 2002 Tahoe
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05-05-2014, 03:32 AM #4
- Join Date
- Apr 2008
- Location
- Madison, WI
- Posts
- 7,006
1999 Formula WS6 M6-sold- 2001 Silverado Z71
Oops. Yeah tech2. I just copied that from the service manual. You should be able to just do it w/out a scan tool
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