Loss of HVAC System Mode and/or Temperature Control (Replace HVAC Control Module)
| Subject: | Loss Of HVAC System Mode and/or Temperature Control (Replace HVAC Control Module) |
| Models: | 2002 Cadillac Escalade, Escalade EXT |
| 1999-2002 Chevrolet Silverado, Suburban, Tahoe |
| 2002 Chevrolet Avalanche |
| 1999-2002 GMC Denali, Sierra, Yukon, Yukon XL |
| 2001 GMC Sierra C3 |
| 2002 GMC Sierra Denali |
| with Automatic HVAC System (RPO C68) |
Condition
Some customers may comment that they cannot control the HVAC system modes and/or the temperature. These concerns may be intermittent.
Cause
An HVAC control module logic lock-up may be the cause of these conditions.
Correction
Important: Prior to replacing the HVAC control head, review Corporate Bulletin Number 01-01-39-007 (SI Document ID #845221).
Replace the HVAC control module. Refer to the HVAC Control Module Replacement procedure in the HVAC System -- Automatic sub-section of the Service Manual.
Part Information
Part Number | Description |
|---|---|
15126606 Cadillac, Celsius Temperature Display (RPO U34) | HVAC Control Assembly (Module) |
15126605 Cadillac, Minus (-) Celsius Temperature Display (RPO U34) | HVAC Control Assembly (Module) |
15126604 Chevrolet/GMC, Celsius Temperature Display (RPO U34) | HVAC Control Assembly (Module) |
15126603 Chevrolet/GMC, Minus (-) Celsius Temperature Display (RPO U34) | HVAC Control Assembly (Module) |
Parts are currently available from GMSPO.
Warranty Information
For vehicles repaired under warranty, use:
Labor Operation | Description | Labor Time |
|---|---|---|
D0362 | Control Assembly HVAC (IP) - A/C - Replace | Use published labor operation time |
