# Service bulletin 01\-601

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: 619762
- Published by NHTSA: 2001\-06\-28
- Manufacturer's number: 01\-601
- Manufacturer's date: 2001\-06\-01
- NHTSA component: POWER TRAIN:AUTOMATIC TRANSMISSION

## NHTSA's summary

SUBJECT REGARDING INVESTIGATION OF HARSH SHIFTS ON 4L60E AUTOMATIC TRANSMISSION. \*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, Automatic transmission

## Vehicles listed

- 2001 CHEVROLET ASTRO
- 2001 CHEVROLET BLAZER
- 2001 CHEVROLET CAMARO
- 2001 CHEVROLET CORVETTE
- 2001 CHEVROLET EXPRESS
- 2001 CHEVROLET S10
- 2001 CHEVROLET SILVERADO
- 2001 CHEVROLET SUBURBAN
- 2001 CHEVROLET TAHOE
- 2001 GMC ENVOY
- 2001 GMC JIMMY
- 2001 GMC SAFARI
- 2001 GMC SAVANA
- 2001 GMC SIERRA
- 2001 GMC SONOMA
- 2001 GMC YUKON
- 2001 GMC YUKON XL

## 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.
- [01\-00\-89\-010J](/bulletins/10138197.md), 2018-05-21, Service bulletin: ENGINE; SERVICE BRAKES; EQUIPMENT; POWER TRAIN:AUTOMATIC TRANSMISSION. This informational bulletin provides a revision for 01\-00\-89\-010I to add the 2013 model year.
- [PIP3161H](/bulletins/10114778.md), 2017-08-15, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION. This Preliminary Information communication provides information to the technician about vehicle with a clunk type noise on start up with the vehicle in park when the vehicle is equipped Allison LCT1000 transmission. This condition is considered to be an operating characteristic of the Allison LCT1000 transmission.
- [PIP3161F](/bulletins/10113108.md), 2017-08-15, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION. This Preliminary Information communication provides information to the technician about vehicles with a clunk type noise on start up with the vehicle in park when the vehicle is equipped Allison LCT1000 transmission. This condition is considered to be an operating characteristic of the Allison LCT1000 transmission.
- [PIP3497B](/bulletins/10112845.md), 2017-08-15, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:TORQUE CONVERTER. This Preliminary Information communication provides information to the technician about vehicles that have no forward or reverse. Technician will need to check for metal debris in torque converter clutch valve.
- [PIP5067](/bulletins/10112462.md), 2017-08-15, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:TORQUE CONVERTER; EQUIPMENT:MECHANICAL. This Preliminary Information communication provides information to the technician about vehicles that have a Service Engine Soon Malfunction Indicator Lamp on and an engine misfire. Technician should inspect the torque tube coupling for damage.
- [PIP4379K](/bulletins/10112401.md), 2017-08-15, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION; POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES. This Preliminary Information communication provides information to the technician about vehicles that have not engagement into drive, delayed, no engagement into reverse, and or a range inhibit. Technician may find Diagnostic Trouble Codes P0701, P0731, P0732, P0733, P0734, P0736, P0751, P0756, P0761, P0776, P0843, P0848, P0873, P0877, P0894 or P2723. Technician should follow published Service Information diagnostics for Diagnostic Trouble Code P0701 first. Technician will also ensure the fluid level is at the top of the hot band when the transmission fluid temperature is 175° Fahrenheit. Diagnostic Trouble Codes P0701, P0731, P0732, P0733, P0734, P0736, P0751, P0756, P0761, P0776, P0843, P0848, P0873, P0877, P0894 or P2723 can set by the following fluid service/filter change, transmission service involving removing the pan, low fluid level caused by leaks, or after long periods of storage. If the fluid level has been properly checked using the HOT check procedure listed in Service Information document 2408059 and any of the Diagnostic Trouble Codes reset during a cold start inspect the internal suction filter for possible cracks. If no other concerns are found inspect for a stuck lube regulator valve in the pump cover due to debris.
- [PIP3161G](/bulletins/10111959.md), 2017-08-15, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION. This Preliminary Information communication provides information to the technician about vehicles with a clunk type noise on start up with the vehicle in park when the vehicle is equipped Allison LCT1000 transmission. This condition is considered to be an operating characteristic of the Allison LCT1000 transmission.
- [PIP5340A](/bulletins/10096073.md), 2017-03-21, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:TORQUE CONVERTER. THIS PRELIMINARY INFORMATION COMMUNICATION PROVIDES INFORMATION TO THE TECHNICIAN ABOUT VEHICLE THAT AFTER A TRANSMISSION OR TORQUE CONVERTER REPLACEMENT THE VEHICLE MAY HAVE A HARSH 1\-2 UPSHIFT AND THE CHECK ENGINE LIGHT OR SERVICE ENGINE SOON INDICATOR IS ILLUMINATED. IF YOU HAVE DUPLICATED THE CUSTOMER’S CONCERN AND FOUND DIAGNOSTIC TROUBLE CODE P0894 OR P1870 SET IN THE TRANSMISSION CONTROL MODULE PLEASE CONTACT GENERAL MOTORS TECHNICAL ASSISTANCE CENTER.
- [PIP\-3366\-B](/bulletins/10043185.md), 2012-02-29, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION. CADILLAC/CHEVROLET/GMC/HUMMER: SOME SUVS AND TRUCKS ARE EXHIBITING A CONDITION WHERE BY GRINDING/RATCHETING TYPE NOISE COMING FROM AUTOMATIC TRANSMISSION WHEN SHIFTING INTO PARK WHILE IN 4WD LOW \(4LO\) RANGE. \*PE

JSON: [/v1/bulletins/619762](/v1/bulletins/619762)

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