LaCrosse V6-3.8L VIN 2 (2005)
Control Module HVAC: All Technical Service Bulletins
A/C - Blows Warm Air After Vehicle Restart
Bulletin No.: 05-01-38-007
Date: May 09, 2005
TECHNICAL
Subject:
HVAC System Blows Warm Air After Vehicle Restart, HVAC Control Head Buttons Not Responding or Excessive Time Required to Activate Function
(Update HVAC Control Head Software)
Models:
2005 Buick Allure (Canada Only), LaCrosse
with Automatic Temperature Control HVAC System (RPO CJ2)
Condition
Some customers may comment of any or all of the following conditions:
^
The heating, ventilation and air conditioning (HVAC) system outside air temperature (OAT) does not update after ignition off time is greater than
three hours. This may result in the HVAC system blowing hot air when the customer is expecting cool or cold air after the vehicle is restarted.
^
The HVAC control head buttons do not respond to customer input or excessive time is required for customer to activate function.
Correction
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 5.0 which was made available May 2, 2005. As always, make sure your Tech 2(R) is updated with the latest software version. DO
NOT replace the HVAC control head for these conditions.
Warranty Information
For vehicles repaired under warranty, use the table.
Disclaimer
