# Service bulletin GCUS\-9\-3314 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: 10126008 - Published by NHTSA: 2017\-12\-22 - Manufacturer's number: GCUS\-9\-3314 - Manufacturer's date: 2016\-12\-21 - NHTSA component: FUEL SYSTEM, GASOLINE; EQUIPMENT ## NHTSA's summary 16098 CWNFA Customer Advisory Letter. The letter is to reinforce the need to annually inspect the aft to aft tank flex line and the midship to aft tank flex line. Over time, a leak may occur by exposure to environmental elements and their corrosive effect on these lines. Additionally, if the lines are damaged due to hard contact with the park brake cable and/or external impact, a leak may occur. In such cases, the lines may show evidence of a jacket cut, nick, or rub\-through. If this condition affects your vehicle, at fuel fill\-up or start\-up, you may notice a CNG odor or hear a hissing sound. If the line experiences an abrupt failure, you may hear a loud bang due to the rapid release of the gas. To check for this condition, please have a certified CNG technician inspect these lines in accordance with GM Service Information procedures for CNG leakage, corrosion and damage. This inspection should be performed annually as part of routine maintenance. ## The document - [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2016/MC-10126008-9999.pdf) - [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2016/MC-10126008-0001.pdf) The document is the manufacturer's. This site does not hold it. ## Components Equipment and accessories, Fuel system ## Vehicles listed - 2011 to 2015 CHEVROLET EXPRESS - 2011 to 2015 GMC SAVANA ## Recalls for the same vehicles and component - [2018212](/recalls/tc/2018212.md), 2018-04-27: Accessories - [18V267000](/recalls/nhtsa/18V267000.md), 2018-04-26: EQUIPMENT - [13V544000](/recalls/nhtsa/13V544000.md), 2015-10-30: EQUIPMENT:OTHER:LABELS - [14V706000](/recalls/nhtsa/14V706000.md), 2014-11-05: EQUIPMENT ADAPTIVE/MOBILITY - [2014352](/recalls/tc/2014352.md), 2014-08-19: Fuel System - [14V500000](/recalls/nhtsa/14V500000.md), 2014-08-13: FUEL SYSTEM, OTHER - [2013206](/recalls/tc/2013206.md), 2013-06-12: Fuel System - [13V225000](/recalls/nhtsa/13V225000.md), 2013-05-15: FUEL SYSTEM, OTHER - [13V080000](/recalls/nhtsa/13V080000.md), 2013-03-08: FUEL SYSTEM, OTHER:DELIVERY:HOSES, LINES/PIPING, AND FITTINGS; FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY:PRESSURE RELIEF DEVICES ## Other bulletins for the same vehicles and component - [25\-NA\-065](/bulletins/11017173.md), 2025-04-24, Service bulletin: STEERING; SERVICE BRAKES; FUEL/PROPULSION SYSTEM. This informational bulletin instructs the tech when fuel/fluid is needed to be tested and where it can be sent for analysis. - [05\-06\-04\-022V](/bulletins/11007095.md), 2024-09-05, Service bulletin: FUEL/PROPULSION SYSTEM. This bulletin provides information on the TOP TIER Detergent Gasoline Licensed Brands and the TOP TIER Diesel Fuel Licensed Brands that are recommended for use in all GM vehicles and the TOP TIER FUELS website URL. - [18\-NA\-103](/bulletins/11006604.md), 2024-08-24, Service bulletin: FUEL/PROPULSION SYSTEM; ENGINE. This service bulletin provides service information for customer concerns of an in\-tank fuel pump whining noise, engine hard to start and/or stalls and Malfunction Indicator Lamp \(MIL\) is illuminated that may be caused by gelling of fuel in cold temperatures. - [20\-NA\-038](/bulletins/11006377.md), 2024-08-15, Service bulletin: FUEL/PROPULSION SYSTEM. This informational bulletin explains the difference in AFM and DFM engines and what is and is not activated during this occurrence. - [16\-NA\-383](/bulletins/11004761.md), 2024-07-16, Service bulletin: ENGINE; FUEL/PROPULSION SYSTEM. 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. - [04\-06\-04\-051I](/bulletins/11004727.md), 2024-07-16, Service bulletin: FUEL/PROPULSION SYSTEM. This service bulletin provides information for maintenance cleaning of the fuel injectors and gasoline detergent additive. - [PI0488C](/bulletins/10254219.md), 2024-05-06, Service bulletin: EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; POWER TRAIN. Diagnostic Information for Transmission. - [20\-NA\-132](/bulletins/10253527.md), 2024-04-23, Service bulletin: EQUIPMENT; ELECTRICAL SYSTEM. This warranty administration bulletin provides policy information on the requirements for 12V battery testing and warranty replacements. - [17\-NA\-052](/bulletins/10253526.md), 2024-04-23, Service bulletin: WHEELS; EQUIPMENT. This bulletin updates the position of General Motors on refinishing aluminum wheels. GM has determined that wheel refinishing under warranty will no longer be performed. - [PIP5151B](/bulletins/10253413.md), 2024-04-22, Service bulletin: FUEL SYSTEM, GASOLINE. Duramax Fuel System Contamination Identification. 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