Technical Service Bulletin 866503A — 1999 GMC T SERIES
ENGINE AND ENGINE COOLING:ENGINE
Bulletin Details
| TSB ID | 866503A |
| Manufacturer | |
| Vehicle | 1999 GMC T SERIES |
| Component | ENGINE AND ENGINE COOLING:ENGINE |
| Communication Date |
Bulletin Summary
SUBJECT REGARDING OBD II DIAGNOSTIC TROUBLE CODE (DTC) P1404 (REFLASH VCM). *YC
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.