# Service bulletin 14423A

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.

- Type: Service bulletin
- NHTSA id: 10089419
- Published by NHTSA: 2017\-01\-24
- Manufacturer's number: 14423A
- Manufacturer's date: 2015\-12\-14
- NHTSA component: FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY

## NHTSA's summary

14423A \- SPECIAL COVERAGE \(REVISED PART INFORMATION\). SOME 2004 MODEL YEAR BUICK RAINIER, 2003\-2004 MODEL YEAR CHEVROLET SSR, 2002\-2004 MODEL YEAR CHEVROLET TRAILBLAZER, CHEVROLET TRAILBLAZER EXT, GMC ENVOY, GMC ENVOY XL, AND OLDSMOBILE BRAVADA, AND 2004 MODEL YEAR GMC ENVOY XUV VEHICLES CONTAIN A FUEL TANK INLET CHECK VALVE \(ICV\) THAT 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. DEALERS ARE TO REPLACE THE FUEL TANK.

## 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, Fuel tank

## Vehicles listed

- 2004 BUICK RAINIER
- 2003 to 2004 CHEVROLET SUBURBAN
- 2002 to 2004 CHEVROLET TRAILBLAZER EXT
- 2002 to 2004 GMC ENVOY XL
- 2003 to 2004 GMC ENVOY XUV

## Recalls for the same vehicles and component

- [03V019000](/recalls/nhtsa/03V019000.md), 2003-01-27: FUEL SYSTEM, GASOLINE:STORAGE:TANK ASSEMBLY

## Other bulletins for the same vehicles and component

- [PIT4943D](/bulletins/10114954.md), 2017-08-15, Service bulletin: FUEL SYSTEM, GASOLINE; FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. This Preliminary Information communication provides information to the technician about vehicles that have a Service Engine Soon Malfunction Indicator Lamp. Technician may find Diagnostic Trouble Code P0442. Technician will need to review Techlink article from May 2013 titled "Using the Evaporative Emissions System Tester" Technician will need to follow these steps to help diagnose the issue. First after the P0442 has been verified do not disturb any of the fuel system components. The technician now can use the scan tool to close the Evaporative Emissions System. If possible change the tank pressure sensor units from inch\_H2O to milimeter\_Hg for better resolution. Now the vehicle can be stared to monitor the tank pressure sensor output value for approximately two minutes. If the tank pressure sensor value does change, pressurize the fuel tank side of the purge solenoid with the GE 41413\-A / J 41413\-A and the necessary adaptors. Now add smoke and allow pressure to stabilize for 2 minutes. If smoke is allowed to pass through the purge solenoid, replace the purge solenoid. If the tank pressure sensor value does not change, then install CH\-48096 adaptor between the purge line from the canister and the purge solenoid. With the Evaporative Emissions System closed, pressurize the system through the CH\-48096 adaptor and allow the system to completely stabilize, by observing the Press / Vac Gauge for a minimum of 5 minutes. Now add smoke to the system with GE 41413\-A / J 41413\-A after system stabilization. Now inspect the purge solenoid, engine side, fuel cap, canister vent solenoid filter and any line quick connects. When the leak is unable to be located, test under a vacuum condition. his type of leak may be detected by using the scan tool Purge/Seal function to create a vacuum in the Evaporative Emissions System and then observe the FTP sensor parameter for vacuum decay.
- [14423](/bulletins/10089561.md), 2017-01-26, Service bulletin: FUEL SYSTEM, GASOLINE:STORAGE:TANK ASSEMBLY; EQUIPMENT; FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY. 14423 \- SPECIAL COVERAGE. SOME VEHICLES CONTAIN A FUEL TANK INLET CHECK VALVE \(ICV\) THAT 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. DEALERS ARE TO REPLACE THE FUEL TANK.
- [14423A](/bulletins/10089488.md), 2017-01-25, Service bulletin: FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY. 14423A \- SPECIAL COVERAGE \(REVISED PART INFORMATION\). SOME 2004 MODEL YEAR BUICK RAINIER, 2003\-2004 MODEL YEAR CHEVROLET SSR, 2002\-2004 MODEL YEAR CHEVROLET TRAILBLAZER, CHEVROLET TRAILBLAZER EXT, GMC ENVOY, GMC ENVOY XL, AND OLDSMOBILE BRAVADA, AND 2004 MODEL YEAR GMC ENVOY XUV VEHICLES CONTAIN A FUEL TANK INLET CHECK VALVE \(ICV\) THAT 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. DEALERS ARE TO REPLACE THE FUEL TANK.
- [07076](/bulletins/10026522.md), 2008-11-05, Service bulletin: FUEL SYSTEM, GASOLINE:STORAGE:TANK ASSEMBLY; FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY. BUICK CHEVROLET GMC OLDSMOBILE SERVICE CAMPAIGN: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. SPECIAL COVERAGE ADJUSTMENT \- FUEL TANK MODULAR RESERVOIR ASSEMBLY CORROSION. CSC LETTER WAS RECEIVED. UPDATED 11/6/08. \*PE UPDATED 5/5/09. CSC LETTER WAS RECEIVED. \*PE
- [20050577](/bulletins/10014969.md), 2005-05-13, Service bulletin: FUEL SYSTEM, GASOLINE:STORAGE:TANK ASSEMBLY. FUEL TANK INLET CHECK VALVE FRACTURE. \*EH
- [040604003](/bulletins/10011209.md), 2005-01-11, Service bulletin: FUEL SYSTEM, GASOLINE:STORAGE:TANK ASSEMBLY. VEHICLE IS DIFFICULT TO FILL WITH FUEL OR FILLING STATION PUMP SHUTS OFF BEFORE TANK IS FULL OR FUEL SPITS BACK/OUT WHEN FILLING TANK. \*TT
- [3110](/bulletins/10010025.md), 2004-11-04, Service bulletin: FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY:PRESSURE RELIEF DEVICES. ERRATIC OIL PRESSURE WITH DIAGNOSTIC TROUBLE CODE'S P0522 AND/OR P0523. \*SC
- [3043](/bulletins/10009390.md), 2004-09-28, Service bulletin: FUEL SYSTEM, GASOLINE:STORAGE:TANK ASSEMBLY:FILLER PIPE AND CAP. FUEL SPLASH FROM FILLER NECK AFTER FILLING TANK AFTER 04\-06\-04\-003. \*TT
- [01588A](/bulletins/10007280.md), 2004-06-09, Service bulletin: FUEL SYSTEM, GASOLINE:STORAGE:TANK ASSEMBLY:FILLER PIPE AND CAP. FUEL CAP TETHER STRAP TOO SHORT. \*TT
- [01588](/bulletins/10005427.md), 2004-02-25, Service bulletin: FUEL SYSTEM, GASOLINE:STORAGE:TANK ASSEMBLY:FILLER PIPE AND CAP. CHANGE IN GAS CAP TETHER ATTACHMENT POINT. SERVICE VME. SIT BULLETIN 1414321. \*TT

JSON: [/v1/bulletins/10089419](/v1/bulletins/10089419)

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