WenmarOpen by Wenmar Pro

Service bulletin 050730030

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 id10018676
Published by NHTSA2006-01-10
Manufacturer's number050730030
Manufacturer's date2005-11-01
NHTSA componentPOWER TRAIN

NHTSA's summary

USE OF SHRINK TUBING AROUND TRANSMISSION FLUID LEVEL INDICATOR (DIPSTICK) TUBE JOINT TO AVOID WATER INTRUSION. 2006 AND PRIOR CHEVROLET AND GMC MEDIUM DUTY TILT CAB MODELS AS WELL AS 2006 AND PRIOR ISUZU COMMERCIAL MODELS. *NM

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

Vehicles listed
CHEVROLET W35002006
CHEVROLET W45002006
CHEVROLET W55002006
GMC W35002006
GMC W45002006
GMC W55002006
ISUZU NPR2006
ISUZU NQR2006
ISUZU NRR2006

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-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
030730004B2004-01-05. Service bulletin. REVISION OF AISIN TRANSMISSION QUALITY CENTER (TQC) PROGRAM BEGINNING OCTOBER 1, 2003. *TT
0307300352003-12-04. Service bulletin. REPLACEMENT OF OUTPUT FLANGE NUT WHEN SERVICING TRANSMISSION. ALSO INCLUDES 2004 MODELS. *TT