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Service bulletin 3491

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 id10017016
Published by NHTSA2005-10-21
Manufacturer's number3491
Replaces3491A
NHTSA componentFUEL SYSTEM, OTHER

NHTSA's summary

HIGHWAY SPEED EXCESSIVE SMOKE AND FUEL KNOCK. *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

Fuel system

Vehicles listed
CHEVROLET C45002006
CHEVROLET C55002006
CHEVROLET EXPRESS2004, 2005, 2006
CHEVROLET KODIAK2004 to 2005
CHEVROLET SILVERADO2004, 2005, 2006
GMC C45002006
GMC C55002006
GMC SAVANA2004, 2005, 2006
GMC SIERRA2004, 2005, 2006
GMC TOPKICK2004 to 2005

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

Recalls for the same vehicles and component
20122652012-08-08. Fuel System
12V3880002012-08-08. FUEL SYSTEM, GASOLINE:STORAGE:TANK ASSEMBLY:FILLER PIPE AND CAP
20061952006-08-04. Fuel System
20042812004-08-05. Fuel System
04V3760002004-08-02. FUEL SYSTEM, GASOLINE:DELIVERY:HOSES, LINES/PIPING, AND FITTINGS

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
16-NA-3832024-07-16. Service bulletin. This service bulletin advises of a new fuel injection cleaner kit used for decarbonizing the intake valves to correct conditions of rough idle, Crank no start, extended crank or misfire, MIL with DTCs, and explains how Top Tier fuels should be used to reduce carbon build-up.
1406040052024-02-12. Service bulletin. Duramax® Diesel Glow Plugs Difficult to Install Due to Carbon Buildup - New Glow Plug Bore Reamer Available
1406040052023-12-11. Service bulletin. Duramax® Diesel Glow Plugs Difficult to Install Due to Carbon Buildup - New Glow Plug Bore Reamer Available
121672023-12-04. Service bulletin. Special Coverage Adjustment - Fuel Filler Pipe Corrosion
PIP58562022-06-13. Service bulletin. This Preliminary information communicates provides information to the technician on the use of R-99 or R-95 Renewable diesel fuel.
080604006N2022-06-13. Service bulletin. This informational bulletin provides technicians with Information for Identifying non-GM ECM calibration use and Power-Up hardware detection in Duramax™ diesel engines — Photograph Tech 2® Calibration IDs, Calibration Verification Numbers (CVNs) and Transmission Data Screen.
05-00-89-072E2022-04-05. Service bulletin. This service bulletin provides the technician with additional information on fuels, fuel additives and fuel management.
04-06-04-051F2022-04-05. Service bulletin. This service bulletin provides information for maintenance cleaning of the fuel injectors and gasoline detergent additive.
PIP4723F2022-02-14. Service bulletin. This Preliminary Information communicates to the dealer the process for downloading or updating operating software for the Tire Pressure Monitor, Active Fuel Injector tester, multi media tester, PICO Scope, GR8 starting/charging tester and Vehicle Data Recorder tools, giving website address and step by step instructions to complete the update.
21NA1242021-07-19. Service bulletin. This service bulletin provides diagnostic tips/steps on testing for possible EVAP leaks in the system to correct a customer concern of an MIL Illuminated with DTCs P0442 and/or P0455 Set.