Technical Service Bulletin 990421004 — 2000 GMC K1
POWER TRAIN:DRIVELINE:DIFFERENTIAL UNIT
Bulletin Details
| TSB ID | 990421004 |
| Manufacturer | |
| Vehicle | 2000 GMC K1 |
| Component | POWER TRAIN:DRIVELINE:DIFFERENTIAL UNIT |
| Communication Date |
Bulletin Summary
SOME PICKUPS AND FULL-SIZE UTILITY MODELS WITH AN AUTOMATIC TRANSFER CASE MAY EXHIBIT A BUMP / CLUNK UPON ACCELERATION. *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.