# Service bulletin G\-171218

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: 10114183
- Published by NHTSA: 2017\-08\-15
- Manufacturer's number: G\-171218
- Manufacturer's date: 2013\-07\-19
- NHTSA component: FUEL SYSTEM, GASOLINE:STORAGE:TANK ASSEMBLY

## NHTSA's summary

10054E \- Special Coverage \(customer co\-pay discontinued\). The contacts on the fuel level sensor may wear prematurely. This wear could cause the fuel gauge to read empty after filling the tank and cause the malfunction indicator light \(MIL\) to illuminate. As the fuel level in the tank drops, the MIL may turn off and the gauge may display a reading; however, the reading may indicate a slightly higher level of fuel than what is in the tank. Eventually, as the contacts continue to wear, the fuel gauge will stop working and the MIL will illuminate continuously. If the condition occurs within the stated terms, dealers will install a new design fuel level sensor.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2013/MC-10114183-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2013/MC-10114183-0001.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Fuel system, Fuel tank

## Vehicles listed

- 2005 to 2007 BUICK RAINIER
- 2005 to 2006 CHEVROLET SSR
- 2005 to 2007 CHEVROLET TRAILBLAZER
- 2006 CHEVROLET TRAILBLAZER EXT
- 2005 CHEVROLET TRAILBLAZER EXT 370
- 2005 to 2007 GMC ENVOY
- 2006 GMC ENVOY XL
- 2005 GMC ENVOY XL 370
- 2005 GMC ENVOY XUV

## 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.
- [PIP4786A](/bulletins/10114456.md), 2017-08-15, Service bulletin: FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY:PRESSURE RELIEF DEVICES. This Preliminary Information communication provides information to the technician about vehicles that may have low oil pressure message. Technician may also find a Diagnostic Trouble Code P0521 in the Engine Control Module. Technician should follow all published Service Information diagnosis. When using a scan tool if the oil pressure is low but the oil pressure at the oil filter housing is correct, technician should inspect the Valve Lifter Oil Filter for debris/sludge that could be restricting oil flow to the oil pressure sensor. Technician should remove the Valve Lifter Oil Filter and clean it. If the Valve Lifter Oil Filter cannot be cleaned replace it.

JSON: [/v1/bulletins/10114183](/v1/bulletins/10114183)

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