Technical Service Bulletin 020604005 — 2002 GMC SIERRA 3500
ENGINE AND ENGINE COOLING:ENGINE:GASOLINE
Bulletin Details
| TSB ID | 020604005 |
| Manufacturer | |
| Vehicle | 2002 GMC SIERRA 3500 |
| Component | ENGINE AND ENGINE COOLING:ENGINE:GASOLINE |
| Communication Date |
Bulletin Summary
SUBJECT REGARDING REVISED DIAGNOSTIC TROUBLE CODE P1221 SERVICE MANUAL INFORMATION. *TT
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.