Service bulletin 990421003C
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
| Type | Service bulletin |
|---|---|
| NHTSA id | 10004401 |
| Published by NHTSA | 2003-12-05 |
| Manufacturer's number | 990421003C |
| Manufacturer's date | 2003-08-01 |
| Replaces | 990421003B |
| NHTSA component | POWER TRAIN:DRIVELINE:DIFFERENTIAL UNIT |
NHTSA's summary
FRONT WHEELS SLIPPING WITH VEHICLE IN FOUR WHEEL DRIVE. *TT
The document
No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.
Components
Transmission and driveline, Differential
| CHEVROLET BLAZER | 1999, 2000, 2001 |
|---|---|
| CHEVROLET SILVERADO | 1999, 2000, 2001 |
| GMC ENVOY | 1999 to 2001 |
| GMC JIMMY | 1999 to 2001 |
| GMC SIERRA | 1999, 2000, 2001 |
Listing a model year does not mean every vehicle of it is concerned: the document says which.
| PIP4054A | 2008-04-07. Service bulletin. EATON LOCKING DIFFERENTIAL CHATTER SHUDDER NOISE ON TURNS, EQUIPPED WITH A LOCKING REAR DIFFERENTIAL RPO G80. *NJ UPDATED 7/17/2008. *PE |
|---|---|
| 010417001A | 2001-10-25. Service bulletin. SOME CUSTOMERS MAY COMMENT ON A VIBRATION DURING ACCELERATION FROM 0 - 40 KM/H (0 - 25 MPH). *TT |
| 990421003B | 2001-05-24. Service bulletin. SOME OWNERS MAY COMMENT ON A SLIPPING TYPE CONDITION AT THE FRONT WHEELS WHILE THE VEHICLE IS IN FOUR WHEEL DRIVE (4WD). *TT |