Technical Service Bulletin 438135 — 1990 PONTIAC SUNBIRD
VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:REAR WINDOW
Bulletin Details
| TSB ID | 438135 |
| Manufacturer | |
| Vehicle | 1990 PONTIAC SUNBIRD |
| Component | VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:REAR WINDOW |
| Communication Date |
Bulletin Summary
BUZZING SOUND WHEN REAR DEFOGGER IS ON. *TW
About Technical Service Bulletins
A Technical Service Bulletin (TSB) is a document issued by a vehicle manufacturer to its dealers, describing a known issue with a specific vehicle or set of vehicles and the recommended procedure to fix it. Unlike recalls, TSBs are not mandatory and are typically only performed if an owner reports the related issue. However, TSBs can be an indicator of common problems with a vehicle.