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Service bulletin 030730035

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 id10004380
Published by NHTSA2003-12-04
Manufacturer's number030730035
Manufacturer's date2006-10-01
Replaces030730035B
NHTSA componentPOWER TRAIN:AUTOMATIC TRANSMISSION

NHTSA's summary

REPLACEMENT OF OUTPUT FLANGE NUT WHEN SERVICING TRANSMISSION. ALSO INCLUDES 2004 MODELS. *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
CHEVROLET W SERIES1999 to 2000
CHEVROLET W-SERIES2001 to 2004
GMC W SERIES1999 to 2000
GMC W-SERIES2001 to 2004
ISUZU NPR1999
ISUZU NPR2000 to 2005
ISUZU NPR2006, 2007
ISUZU NQR1999, 2000, 2001, 2002, 2003, 2004
ISUZU NQR2005 to 2007

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
SB-12-K-0022013-01-24. Service bulletin. ISUZU: DUE TO INSECT NESTING AND/OR DEBRIS LEFT BY FLOODING, FLUID IS LEAKING AT TOP OF AUTOMATIC TRANSMISSION DIPSTICK TUBE, AND A NEW BREATHER HOSE VENT WAS DESIGNED TO REDUCE THIS CONDITION. MODELS 2007-2012 N SERIES, 2007-2010 W SERIES. *PE
SB-09-K-0012010-04-05. Service bulletin. ISUZU (CHEVROLET/GMC): THE TRANSMISSION SLIPS, WILL NOT SHIFT, OR MAY OVERHEAT. TECHNICIANS MAY FIND DTCS P0894 OR P0218 STORED EITHER CURRENT OR IN HISTORY. THESE CONDITIONS MAY BE CAUSED BY FRICTION MATERIAL DEBONDING FROM THE TORQUE CONVERTER CLUTCH. HARSH OR DELAYED SHIFTS, NO DRIVE, NO REVERSE, SLIPS AND THE SES/MIL MAY BE ILLUMINATED. *PE UPDATED 9/15/10. *PE
055552005-09-15. Service bulletin. PROGRAM BULLETIN (CUSTOMER SATISFACTION PROGRAM)-AISIN ATF LEVEL GAUGE INCORRECT LENGTH. *SC
200507872005-09-15. Service bulletin. ADMINISTRATIVE MESSAGE-VEHICLES EQUIPPED WITH A 4HK1T DIESEL ENGINE AND AISIN AUTOMATIC TRANSMISSION HAVE AN AUTOMATIC TRANSMISSION FLUID (ATF) LEVEL GAUGE WITH AN INCORRECT LENGTH. *SC
0407300082004-08-14. Service bulletin. AISIN AUTOMATIC TRANSMISSION FLUID SERVICE REMINDER. 2005 ISUZU NPR/NQR INCLUDED. *TT
0307300602004-03-04. Service bulletin. AUTOMATIC TRANSMISSION OIL COOLER FLUSHING ON CERTAIN MEDIUM DUTY TILT CAB MODELS AND COMMERCIAL MODELS INCLUDING MODEL YEAR 2004. *TT
0307300502004-01-05. Service bulletin. APPROVED AISIN AUTOMATIC TRANSMISSION ON-VEHICLE REPAIRS. 2004 MODELS INCLUDED. *TT
020730025B2003-10-01. Service bulletin. HARSH SHIFTING, DELAYED UPSHIFTS WITH POSSIBLE CHECK TRANS LAMP ILLUMINATED, POSSIBLE DIAGNOSTIC TROUBLE CODE (DTC) 21 SET. TO INCLUDE 2004 MODELS. *TT
0207300252002-10-16. Service bulletin. SUBJECT REGARDING HARSH SHIFTING, DELAYED UPSHIFTS, POSSIBLE CHECK TRANS LAMP ILLUMINATED, POSSIBLE DIAGNOSTIC TROUBLE CODE 21 STORED IN THE TRANSMISSION CONTROL MODULE (TCM) MEMORY. *TT
020730025A2002-10-10. Service bulletin. HARSH SHIFTING, DELAYED UPSHIFTS, POSSIBLE CHECK TRANS LAMP ILLUMINATED, POSSIBLE DIAGNOSTIC TROUBLE CODE 21 STORED IN TCM MEMORY. *TT