Service bulletin 030421001C
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 | 10002856 |
| Published by NHTSA | 2003-09-29 |
| Manufacturer's number | 030421001C |
| Manufacturer's date | 2003-06-01 |
| Replaces | 030421001B |
| NHTSA component | POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE) |
NHTSA's summary
4-WHEEL DRIVE SWITCH INDICATOR LIGHTS FLASHING, 4-WHEEL DRIVE INOPERATIVE, DIAGNOSTIC TROUBLE CODES C0327, P0836, P0500. *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
Trouble codes named
C0327, P0500, P0836
| CHEVROLET AVALANCHE | 2003 |
|---|---|
| CHEVROLET SILVERADO | 2003 |
| CHEVROLET SUBURBAN | 2003 |
| CHEVROLET TAHOE | 2003 |
| GMC YUKON | 2003 |
| OLDSMOBILE BRAVADA | 2003 |
Listing a model year does not mean every vehicle of it is concerned: the document says which.
| 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. |
|---|---|
| 3665 | 2006-01-25. Service bulletin. 4WD INOPERATIVE AND POSSIBLE DTC C0327 STORED IN THE TRANSFER CASE CONTROL MODULE. *TT |
| 05-04-21-003 | 2005-11-09. Service bulletin. SERVICE 4WD LIGHT ILLUMINATED, DIAGNOSTIC TROUBLE CODE (DTC) C0374 SET. *TT UPDATED 10/05/07. *NJ INSPECT WIRING HARNESS TO TRANSFER CASE SPEED SENSORS, REPLACE WIRING HARNESS. UPDATED 7/18/08 *PE |
| 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 |
| 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 |
| 3132A | 2004-11-03. Service bulletin. NVG149 NP3 TRANSFER CASE MAY EXHIBIT A BIND OR SHUDDER ON TURNS. *TC |
| 09132002 | 2004-09-30. Service bulletin. THIS MESSAGE COVERS COMMENTS THAT THE SERVICE FOUR-WHEEL DRIVE INDICATOR IS ILLUMINATED OR FOUR-WHEEL DRIVE IS INOPERABLE. *TT |
| 01843 | 2004-07-19. Service bulletin. CALIBRATION FOR IMPROVED TRANSFER CASE OPERATION IN AWD MODE. *TT |