Service bulletin 3012B
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 | 10008806 |
| Published by NHTSA | 2004-08-23 |
| Manufacturer's number | 3012B |
| Replaces | 3012A |
| NHTSA component | POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE) |
NHTSA's summary
THE NVG 136 ALL WHEEL DRIVE (AWD) TRANSFER CASE AND THE 236 AND 246 NVG SELECTABLE TRANSFER CASES OPERATING IN THE AUTO MODE MAY EXHIBIT A CONDITION OF A VIBRATION/SHUDDER DURING LOW SPEED TURNS SUCH AS A PARKING LOT MANEUVER, UP TO APPROXIMATELY 5 MPH. *TT 3012A NOT YET RECEIVED. *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, Transfer case
| CADILLAC ESCALADE | 1999, 2000, 2001, 2002 |
|---|---|
| CHEVROLET ASTRO | 1999 to 2004 |
| CHEVROLET BLAZER | 1999, 2000, 2001, 2002, 2003, 2004 |
| CHEVROLET SILVERADO | 1999, 2000, 2001, 2002 |
| CHEVROLET SUBURBAN | 1999, 2000, 2001, 2002 |
| CHEVROLET TAHOE | 1999, 2000, 2001, 2002 |
| GMC ENVOY | 1999 to 2001 |
| GMC ENVOY | 2002 |
| GMC JIMMY | 1999 to 2004 |
| GMC SAFARI | 1999, 2000, 2001, 2002, 2003, 2004 |
| GMC SIERRA | 1999, 2000, 2001, 2002 |
| GMC SUBURBAN | 1999, 2000 |
| GMC SUBURBAN | 2001 to 2002 |
| GMC YUKON | 1999, 2000, 2001, 2002 |
| OLDSMOBILE BRAVADA | 1998, 1999, 2000, 2001 |
Listing a model year does not mean every vehicle of it is concerned: the document says which.
| 01V334000 | 2001-10-17. POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE) |
|---|---|
| 01V283000 | 2001-09-05. POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE) |
A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.
| PIP3366C | 2018-08-20. Service bulletin. This Preliminary information communicates to the dealer technician thatLight Duty Trucks equipped with automatic transmissions and 4 wheel drive may exhibit a condition of grinding/ratcheting type noise when shifting the automatic transmission into park while the transfer case is in 4 wheel drive low (4LO) range. Dealers technician's are advised this condition should be deemed a normal characteristic of 4WD low operation. |
|---|---|
| 040421004 | 2005-11-08. Service bulletin. 4WD SWITCH INDICATOR LIGHTS FLASHING, 4WD INOPERATIVE, DIAGNOSTIC TROUBLE CODES C0327, P0550 SET. *TT |
| 3424 | 2005-11-02. Service bulletin. ELECTRONIC TRANSFER CASE UNABLE TO COMPLETE SHIFT. *TT |
| 3389 | 2005-09-28. Service bulletin. FOUR WHEEL DRIVE INOPERATIVE AND THE 4WD SERVICE LIGHT WILL ILLUMINATE. DIAGNOSIS MAY REVEAL THAT THE ATC FUSE COULD BE OPEN, POSSIBLE DTC C0308, OR VARIOUS U CODES MAY BE SET. THE ENCODER MOTOR MAY ALSO BE SHORTED OR THE TCCM MAY BE DAMAGED. *TT |
| 3526 | 2005-09-22. Service bulletin. INTERMITTENT SERVICE 4WD LIGHT COMES ON WITH DIAGNOSTIC TROUBLE CODE (DTC) C0306 OR C0308 STORED IN TCCM. *TT |
| 3351 | 2005-05-11. Service bulletin. INTERMITTENT MALFUNCTION INDICATOR LAMP (MIL) WITH DIAGNOSTIC TROUBLE CODE (DTC) C0374 OR ERRATIC 4WD/AWD OPERATION. *TT |
| 3349 | 2005-05-10. Service bulletin. 4WD INOPERATIVE AND DIAGNOSTIC TROUBLE CODE (DTC) U1026 ATC FUSE OPEN. *TT |
| 3132A | 2004-11-03. Service bulletin. NVG149 NP3 TRANSFER CASE MAY EXHIBIT A BIND OR SHUDDER ON TURNS. *TC |
| 01843 | 2004-07-19. Service bulletin. CALIBRATION FOR IMPROVED TRANSFER CASE OPERATION IN AWD MODE. *TT |
| 020421006C | 2003-12-04. Service bulletin. INOPERATIVE 4WD/AWD LAMPS, INOPERATIVE 4WD/AWD SYSTEM. *TT |