WenmarOpen by Wenmar Pro

Service bulletin 280301

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 id619203
Published by NHTSA2001-05-18
Manufacturer's number280301
Manufacturer's date2001-03-28
NHTSA componentENGINE AND ENGINE COOLING:ENGINE:GASOLINE

NHTSA's summary

THIS COMMUNICATION IS TO PROVIDE DEALER PERSONNEL WITH THE SAME INFORMATION THAT WAS PROVIDED IN A CUSTOMER NOTIFICATION LETTER TO ALL REGISTERED OWNERS OF MEDIUM DUTY C AND B SERIES VEHICLES EQUIPPED WITH AN IMPCO LIQUEFIED PETROLEUM GAS (LPG) CONVERSION KIT. SOME OF THESE VEHICLES EXHIBIT A CONDITION IN WHICH THE ENGINE MAY BACKFIRE AND FRACTURE THE PLASTIC INLET ELBOW WITHIN THE ENGINE COMPARTMENT. *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

Engine

Vehicles listed
CHEVROLET B SERIES2001
CHEVROLET C SERIES (MEDIUM)2001
GMC B SERIES2001
GMC C SERIES(MEDIUM)2001

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