Terraza FWD V6-3.5L VIN 8 (2005)
Control Module HVAC: All Technical Service Bulletins
A/C - Mode Actuator Inoperative/Noisy, Electrical Issues
Bulletin No.: 05-01-38-011
Date: June 28, 2005
TECHNICAL
Subject:
HVAC Mode Actuator Noisy or Inoperative, Heated Seats and/or Rear Defroster/Defogger May Turn Off With Activation of
Rear Power Windows (Update HVAC Control Module Software)
Models:
2005 Buick Terraza
2005 Chevrolet Uplander
2005 Pontiac Montana 5V6
2005 Saturn Relay
Condition
Some customers may comment on a noisy or inoperative Heating, Ventilation and Air Conditioning (HVAC) mode actuator. Others may comment that
the heated seats and/or the rear defroster/defogger may turn off with activation of the rear power windows.
Correction
Important:
Do not turn the ignition key oft when "Programming Successful" appears on the Tech 2®. The HVAC control module will be performing an actuator
calibration process and the Air Conditioning (Snowflake) button will be flashing. Wait until the button stops flashing, it may take up to 60 seconds. If the
self calibration is interrupted, it will be necessary to perform the calibration process again. Refer to the Re-Calibrating Actuators procedure in SI
(Document ID # 1538851) for more information.
Technicians are to reprogram the HVAC control head with an updated software calibration. This new service calibration was released with TIS satellite
data update version 7.0 available June 27, 2005. This release also includes Tech 2(R) update version 23.007. Your Tech 2(R) must be updated to this
version or later to perform the HVAC control module updates on these vehicles.
Warranty Information
For vehicles repaired under warranty, use the table.
Disclaimer
