# Service bulletin 01065

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: 628547
- Published by NHTSA: 2002\-03\-13
- Manufacturer's number: 01065
- Manufacturer's date: 2001\-10\-31
- NHTSA component: POWER TRAIN:TRANSFER CASE \(4\-WHEEL DRIVE\)

## NHTSA's summary

ON SOME VEHICLES, THE CALIBRATION OF THE ACTIVE TRANSFER CASE CONTROL MODULE MAY CAUSE INSUFFICIENT HIGH SPEED ENGAGEMENT. \*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

## Vehicles listed

- 2002 CHEVROLET TRAILBLAZER
- 2002 GMC ENVOY

## Recalls for the same vehicles and component

- [01V334000](/recalls/nhtsa/01V334000.md), 2001-10-17: POWER TRAIN:TRANSFER CASE \(4\-WHEEL DRIVE\)
- [01V283000](/recalls/nhtsa/01V283000.md), 2001-09-05: POWER TRAIN:TRANSFER CASE \(4\-WHEEL DRIVE\)

## Other bulletins for the same vehicles and component

- [PIP3366C](/bulletins/10143757.md), 2018-08-20, Service bulletin: POWER TRAIN:TRANSFER CASE \(4\-WHEEL DRIVE\); POWER TRAIN:AUTOMATIC TRANSMISSION. 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\&\#39;s are advised this condition should be deemed a normal characteristic of 4WD low operation.
- [040421004](/bulletins/10017442.md), 2005-11-08, Service bulletin: POWER TRAIN:TRANSFER CASE \(4\-WHEEL DRIVE\). 4WD SWITCH INDICATOR LIGHTS FLASHING, 4WD INOPERATIVE, DIAGNOSTIC TROUBLE CODES C0327, P0550 SET. \*TT
- [3424](/bulletins/10017299.md), 2005-11-02, Service bulletin: POWER TRAIN:TRANSFER CASE \(4\-WHEEL DRIVE\). ELECTRONIC TRANSFER CASE UNABLE TO COMPLETE SHIFT. \*TT
- [3351](/bulletins/10014853.md), 2005-05-11, Service bulletin: POWER TRAIN:TRANSFER CASE \(4\-WHEEL DRIVE\). INTERMITTENT MALFUNCTION INDICATOR LAMP \(MIL\) WITH DIAGNOSTIC TROUBLE CODE \(DTC\) C0374 OR ERRATIC 4WD/AWD OPERATION. \*TT
- [3349](/bulletins/10014809.md), 2005-05-10, Service bulletin: POWER TRAIN:TRANSFER CASE \(4\-WHEEL DRIVE\). 4WD INOPERATIVE AND DIAGNOSTIC TROUBLE CODE \(DTC\) U1026 ATC FUSE OPEN. \*TT
- [3012B](/bulletins/10008806.md), 2004-08-23, Service bulletin: POWER TRAIN:TRANSFER CASE \(4\-WHEEL DRIVE\). 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
- [01843](/bulletins/10007961.md), 2004-07-19, Service bulletin: POWER TRAIN:TRANSFER CASE \(4\-WHEEL DRIVE\). CALIBRATION FOR IMPROVED TRANSFER CASE OPERATION IN AWD MODE. \*TT
- [020421006C](/bulletins/10004357.md), 2003-12-04, Service bulletin: POWER TRAIN:TRANSFER CASE \(4\-WHEEL DRIVE\). INOPERATIVE 4WD/AWD LAMPS, INOPERATIVE 4WD/AWD SYSTEM. \*TT
- [020421002A](/bulletins/10001144.md), 2003-04-17, Service bulletin: POWER TRAIN:TRANSFER CASE \(4\-WHEEL DRIVE\). SERVICE 4WD INDICATOR ILLUMINATED, DIAGNOSTIC TROUBLE CODE \(DTC\) B2725 SET, TRANSFER CASE SELECTOR SWITCH IS IN ONE POSITION \- INDICATOR LAMP INDICATES ANOTHER RANGE IS SELECTED. \*TT
- [020421006A](/bulletins/10000173.md), 2003-02-14, Service bulletin: POWER TRAIN:TRANSFER CASE \(4\-WHEEL DRIVE\). INOPERATIVE 4WD/AWD LAMPS, INOPERATIVE 4WD/AWD SYSTEM. \*TT

JSON: [/v1/bulletins/628547](/v1/bulletins/628547)

[Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Service%20bulletin%2001065&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F628547&vehicle=Service%20bulletin%2001065)