Poor Heating, Ventilation and Air Conditioning (HVAC) System Performance at Full Cold and Full Heat Settings (Reprogram HVAC Control Module)
| Subject: | Poor Heating, Ventilation and Air Conditioning (HVAC) System Performance at Full Cold and Full Heat Settings (Reprogram HVAC Control Module) |
| Models: | 2008 Chevrolet Impala |
| with Manual Dual Zone HVAC (RPO CJ3) |
| Built After VIN Breakpoint 81301712 and Prior to VIN Breakpoint 81369198 |
Condition
Some customers may comment of poor heating, ventilation and air conditioning (HVAC) system performance at full cold and full heat settings.
Cause
This condition may be caused by a heating, ventilation and air conditioning (HVAC) control module software anomaly.
Correction
Do This | Don't Do This |
|---|---|
Update the HVAC control module software. | Do not replace the HVAC control module. |
A revised calibration has been developed to address this condition. Technicians are to reprogram the HVAC control module with the latest software available on TIS2WEB. Refer to the HVAC Control Module Programming and Setup procedure in SI for more information. As always, make sure your Tech 2® is updated with the latest software version.
Warranty Information
For vehicles repaired under warranty, use:
Labor Operation | Description | Labor Time |
|---|---|---|
D4707 | HVAC Control Head Module or Assembly Reprogramming with SPS | Use Published Labor Operation Time |
