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Service bulletin GCUS-9-1493

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 id10079705
Published by NHTSA2016-09-12
Manufacturer's numberGCUS-9-1493
Manufacturer's date2016-01-12
NHTSA componentFUEL SYSTEM, OTHER

NHTSA's summary

14423B - SPECIAL COVERAGE (REVISED PART INFORMATION AND SERVICE PROCEDURE). A FUEL TANK INLET CHECK VALVE (ICV) COULD FRACTURE. THE ICV IS LOCATED ABOVE THE FULL FUEL LEVEL. A FRACTURED ICV COULD ALLOW FUEL VAPORS TO PASS THROUGH AND DROPLETS OF FUEL TO ACCUMULATE ON THE SIDE OF THE FUEL TANK AS IT PASSES OVER THE FRACTURE DURING REFUELING. IF THE ICV FRACTURES, THE VEHICLE’S SERVICE ENGINE SOON (SES) LIGHT MAY ILLUMINATE, AND THE OWNER MAY NOTICE A FUEL ODOR AND/OR A FEW DROPS OF FUEL ON THE GROUND WHEN REFUELING THE VEHICLE. IF THE CONDITION OCCURS WITHIN THE STATED TERMS, THE FUEL TANK WILL BE REPLACED.

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
BUICK RAINIER2004
CHEVROLET TRAILBLAZER2002, 2003, 2004
CHEVROLET TRAILBLAZER EXT2002, 2003, 2004 (the catalog's model; the bulletin names a series or trim of it)
GMC ENVOY2002, 2003, 2004
GMC ENVOY XL2002, 2003, 2004 (the catalog's model; the bulletin names a series or trim of it)
GMC ENVOY XUV2004 (the catalog's model; the bulletin names a series or trim of it)
OLDSMOBILE BRAVADA2002, 2003, 2004

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

Recalls for the same vehicles and component
02V1210002002-08-23. FUEL SYSTEM, GASOLINE:DELIVERY:HOSES, LINES/PIPING, AND FITTINGS
20020702002-05-01. Fuel System

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.
14423C2024-01-16. Service bulletin. Special Coverage Adjustment ? Fuel Tank Inlet Check Valve Fracture
14423B2024-01-16. Service bulletin. Special Coverage Adjustment ? Fuel Tank Inlet Check Valve Fracture
14423A2024-01-16. Service bulletin. Special Coverage Adjustment Fuel Tank Inlet Check Valve Fracture
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.
PIP5163E2021-04-19. Service bulletin. This Preliminary Information communication provides information to the technician about engine block of possible cylinder bore damage, scoring or out of round as the possible cause of engine oil consumption, misfire, cylinder leakage or blow by. Technician will need to inspect the engine for Cylinder damage or scoring, An out of round cylinder bore, Dirt intrusion, and Catalytic Converter failure.
16NA3832020-06-22. Service bulletin. This technical 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.
PIP57252020-06-15. Service bulletin. This Preliminary information communicates the use of Winter grade fuel during the warm months of 2020 and the potential rivability issues that it can cause. The ongoing Coronavirus (COVID-19) pandemic has caused significant reductions in driving and fuel use. Due to the surplus of winter grade fuel sitting in storage (pipelines/stations) the EPA is waiving the fuel vapor requirement. This will extend the use of winter fuel into the summer months. The drivability concerns should not be single events but should be multiple occurrences associated with hot days.
16NA3832020-03-02. Service bulletin. This informational 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.