# Service bulletin 15823 LETTER

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: 10089322
- Published by NHTSA: 2017\-01\-23
- Manufacturer's number: 15823 LETTER
- Manufacturer's date: 2016\-06\-29
- NHTSA component: FUEL SYSTEM, GASOLINE:STORAGE:AUXILLARY TANK

## NHTSA's summary

15823 \- CUSTOMER ADVISORY LETTER. THIS COMMUNICATION WAS TO INFORM DEALERS THAT A CUSTOMER MAILING WAS TAKING PLACE. THE LETTER INFORMS THE CUSTOMERS TO INSPECT FOR LEAKS OR DAMAGE TO THE FUEL FILLER NECK LINE AND/OR THE CARGO TANK HIGH PRESSURE FLEX LINES. TO ADDRESS THIS POTENTIAL CONDITION, CUSTOMERS ARE INSTRUCTED TO HAVE A CERTIFIED CNG TECHNICIAN INSPECT THE FUEL FILLER NECK LINE AND THE CARGO TANK HIGH PRESSURE FLEX LINE IN ACCORDANCE WITH GM SERVICE INFORMATION PROCEDURES. IN ADDITION, TO BE SURE THE CUSTOMER’S VEHICLE DOES NOT HAVE THIS CONDITION, CUSTOMERS ARE ALSO INSTRUCTED TO CONTINUE INSPECTIONS ANNUALLY AS PART OF ROUTINE MAINTENANCE. GM HAS UPDATED THE MAINTENANCE SCHEDULE IN THE CNG VEHICLES OWNER’S MANUAL SUPPLEMENT TO INCLUDE AN ANNUAL INSPECTION OF ALL CNG FLEX LINES.

## 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

- 2011 to 2014 CHEVROLET EXPRESS

## Recalls for the same vehicles and component

- [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

- [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.
- [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.
- [PIP5151B](/bulletins/10253413.md), 2024-04-22, Service bulletin: FUEL SYSTEM, GASOLINE. Duramax Fuel System Contamination Identification.
- [PIP5151](/bulletins/10253412.md), 2024-04-22, Service bulletin: FUEL SYSTEM, GASOLINE. Duramax Fuel System Contamination Identification.
- [PIT5110D](/bulletins/10253076.md), 2024-04-15, Service bulletin: FUEL SYSTEM, DIESEL:DELIVERY:FUEL PUMP. HI
- [PIP5596A](/bulletins/10253061.md), 2024-04-15, Service bulletin: SERVICE BRAKES; FUEL SYSTEM, GASOLINE. This Preliminary information communicates that when removing the fuel line jumper hose care should be taken to be sure the line is reinstalled correctly to avoid a no/low fuel pressure situation.
- [19\-NA\-044](/bulletins/10250505.md), 2024-02-21, Service bulletin: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL; FUEL SYSTEM, GASOLINE. This service bulletin provides information on the cold start control system in DI engines to reduce cold start emissions and improve fuel economy.
- [14D133](/bulletins/10250028.md), 2024-02-12, Service bulletin: ELECTRICAL SYSTEM; FUEL SYSTEM, GASOLINE. Special Return \- Fuel Tank Module Kit: ACDelco Part Number M10256 \(select date codes\)
- [140604003](/bulletins/10250008.md), 2024-02-12, Service bulletin: FUEL SYSTEM, DIESEL. Identifying Non\-GM ECM Calibration Use and Power\-Up Hardware Detection in Duramax® Diesel Engines Using GDS 2

JSON: [/v1/bulletins/10089322](/v1/bulletins/10089322)

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