Terraza FWD V6-3.5L VIN 8 (2005)
Control Module HVAC: Customer Interest
A/C - Inoperative/Poor Performance/Can't Change Mode
Bulletin No.: 06-01-39-004E
Date: February 08, 2008
TECHNICAL
Subject:
EI06031 - HVAC Unable to Change Modes or Temperature Inoperative Poor A/C Performance (Reprogram HVAC Control Module)
Models:
2005-2006 Buick Terraza
2005-2006 Chevrolet Uplander
2005-2006 Pontiac Montana SV6
2005-2006 Saturn Relay
Supercede:
This bulletin is being revised to update the calibration information. Please discard Corporate Bulletin Number 06-01-39-004D (Section 01 - HVAC).
Condition
Some customers may comment that they are unable to change the HVAC mode and/or temperature. Customers may also comment that the A/C may be
inoperative or have poor performance.
Cause
Engineering has determined based on technician feedback that this concern may be caused by not having the updated HVAC control module software or
due to a communication issue between the temperature door actuator and the control head.
Correction
Reprogram the HVAC Control Module with the latest calibration set to correct this issue.
Warranty Information
For vehicles repaired under warranty, use the table.
Disclaimer
