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Service bulletin 41

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id637387
Published by NHTSA2002-11-25
Manufacturer's number41
Manufacturer's date2002-01-01
NHTSA componentPOWER TRAIN:MANUAL TRANSMISSION

NHTSA's summary

SOME VEHICLES EQUIPPED WITH THE ALLISON LCT1000 TRANSMISSION MAY EXPERIENCE A VERY HARSH 2-1 DOWNSHIFT AT A STOP OR ON THROTTLE REAPPLY. *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, Manual transmission

Vehicles listed
CHEVROLET SILVERADO2001, 2002
GMC SIERRA2001, 2002

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
41442007-08-03. Service bulletin. ALLISON LCT1000 HARSH 3-2, 2-1 DOWNSHIFT, AND ABS MAY ACTIVATE. *KB
6092005-09-02. Service bulletin. CLUTCH PEDAL SQUEAK. *SC
092620022004-08-10. Service bulletin. THIS MESSAGE IS ABOUT THE TRANSMISSION NOT SHIFTING INTO GEAR WITH THE CLUTCH PEDAL FULLY DEPRESSED. *MJ
092520022004-08-10. Service bulletin. THIS MESSAGE IS ABOUT HYDRAULIC FLUID USAGE FOR THE HYDRAULIC CLUTCH SYSTEM. *MJ
00908D2004-02-27. Service bulletin. 6.6L AND MANUAL TRANSMISSION GROWL NOISE WHILE ENGAGING OR DISENGAGING CLUTCH. *TT *MJ
00908C2003-12-05. Service bulletin. 6.6L AND MANUAL TRANSMISSION GROWL NOISE WHILE ENGAGING OR DISENGAGING CLUTCH. THESE ARE C/K MODELS. *TT
1311012002-03-05. Service bulletin. INFORMATION ON 4-WHEEL DRIVE EXTENDED CAB, SHORT BED VEHICLES WITH 4-WHEEL DRIVE EXTENDED CAB, SHORT BED WITH A BUMP OR CLUNK ON STOP OR ACCELERATION. *TT
0111012002-03-05. Service bulletin. THIS MESSAGE COVERS TRUCKS WITH FOUR-WHEEL DRIVE EXTENDED CAB SHORT BED WITH A BUMP OR CLUNK ON STOP OR ACCELERATION IN REFERENCE TO BULLETIN NUMBER 01-04-17-004. *TT
2510012002-03-01. Service bulletin. SOME EXTENDED CAB SHORT BED VEHICLES WITH FOUR-WHEEL DRIVE MAY EXHIBIT A BUMP OR CLUNK ON STOP OR ACCELERATION FROM A STOP. *TT
0107300362002-02-26. Service bulletin. SERVICE ENGINE SOON LAMP ILLUMINATED, INCORRECT TRANSMISSION SHIFTS, POOR PERFORMANCE OF ENGINE, TRANSMISSION SLIPPING. *YH