# Service bulletin GCUS\-9\-2682 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: 10126151 - Published by NHTSA: 2017\-12\-22 - Manufacturer's number: GCUS\-9\-2682 - Manufacturer's date: 2016\-08\-22 - NHTSA component: SERVICE BRAKES, AIR:SUPPLY:CHECK VALVE ## NHTSA's summary 17650 \- Customer Advisory Letter. If this condition affects your vehicle you may noticed the CNG odor or hear a hissing sound. To check for this condition, please have a certified CNG technician inspect the manual shut\-off valve in accordance with GM Service Information procedures for CNG leakage and damage. This inspection should be performed regularly as part of the updated maintenance schedule. If the inspection is performed at a GM dealership, and your vehicle is still covered under its 5 year/50,000 mile \(80,000 km\) Emissions Control Systems Warranty, replacement of the manual shut\-off valve, if required, will be performed for you at no charge. Additionally, we are updating the maintenance schedule in the CNG supplement to your owner manual to include regular inspection of the CNG manual shut\-off valve. The insert is an amendment to your supplement. Please keep this insert with your important vehicle documents for reference. ## The document - [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2016/MC-10126151-9999.pdf) - [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2016/MC-10126151-0001.pdf) The document is the manufacturer's. This site does not hold it. ## Components Brakes ## Vehicles listed - 2011 to 2016 CHEVROLET EXPRESS - 2015 to 2016 CHEVROLET IMPALA - 2014 CHEVROLET SILVERADO 1500 - 2015 to 2016 CHEVROLET SILVERADO 2500 - 2013 CHEVROLET SILVERADO 3500 - 2011 to 2016 GMC SAVANA - 2013 to 2016 GMC SIERRA DENALI ## Recalls for the same vehicles and component - [24V702000](/recalls/nhtsa/24V702000.md), 2024-09-19: SERVICE BRAKES, HYDRAULIC:POWER ASSIST:HYDRAULIC:HOSES, LINES/PIPING, AND FITTINGS - [2019533](/recalls/tc/2019533.md), 2019-10-24: Brakes - [19V761000](/recalls/nhtsa/19V761000.md), 2019-10-24: SERVICE BRAKES; SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP:WHEEL SPEED SENSOR/TONE RING; ELECTRONIC STABILITY CONTROL \(ESC\) - [19V645000](/recalls/nhtsa/19V645000.md), 2019-09-06: SERVICE BRAKES, HYDRAULIC:POWER ASSIST:VACUUM - [2019324](/recalls/tc/2019324.md), 2019-06-28: Brakes - [2018464](/recalls/tc/2018464.md), 2018-08-31: Brakes - [18V578000](/recalls/nhtsa/18V578000.md), 2018-08-30: SERVICE BRAKES, HYDRAULIC:PEDALS AND LINKAGES - [16V069000](/recalls/nhtsa/16V069000.md), 2016-02-05: SERVICE BRAKES, HYDRAULIC:PEDALS AND LINKAGES - [2016053](/recalls/tc/2016053.md), 2016-02-04: Brakes - [2015352](/recalls/tc/2015352.md), 2015-08-05: Brakes ## 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. - [21\-NA\-043](/bulletins/11014230.md), 2025-02-12, Service bulletin: VISIBILITY/WIPER; SERVICE BRAKES; ENGINE; ELECTRICAL SYSTEM; WHEELS. This bulletin advises the dealers to maintain the vehicle stock on hand by doing a full inspection on the vehicles before being sold \(prepping\) to the customer. - [21\-NA\-043](/bulletins/11011709.md), 2024-12-10, Service bulletin: STRUCTURE:BODY; WHEELS; ENGINE; SERVICE BRAKES; UNKNOWN OR OTHER. This bulletin advises the dealers to maintain the vehicle stock on hand by doing a full inspection on the vehicles before being sold \(prepping\) to the customer. - [PIT5282G](/bulletins/11007761.md), 2024-09-13, Service bulletin: SERVICE BRAKES. This Preliminary Information communication provides information to the technician that a customer may request the factory Integrated Trailer Brake Control be bypassed and their aftermarket trailer brake controller be installed instead. Technician will need to gain access to the body harness. Install trailer brake controller harness General Motors part number 23184088 into Middle Bus Electrical Center \(X61A\). - [PIT5509L](/bulletins/11007691.md), 2024-09-11, Service bulletin: SERVICE BRAKES. This Preliminary Information communication provides information to the technician on how to diagnose and repair vehicle that may have a "Check Trailer Wiring" or "Service Trailer Brake System” message on the Driver Information Center when a trailer is connected to the vehicle. Diagnostic Trouble Code C1114 set in the Chassis Control Module. Chassis Control Module has to determine the type of trailer brake system that is being used. The Chassis Control Module can be sensitive to a variety of trailer wiring issues. The technician will need to make a trailer tester using Electric Trailer Brake Magnets and 7\-way trailer connector to determine if it is a vehicle or trailer issue. If the concern is not duplicated with the tester installed, the vehicle is operating correctly and the focus should be on the trailer wiring or 7 way connector. - [PIT6212](/bulletins/11007686.md), 2024-09-11, Service bulletin: SERVICE BRAKES. This Preliminary information communicates an issue with the Hydrastar Electric Over Hydraulic trailer brake system causing a voltage spike into the trucks electrical system which is causing DTC C1114 to set. - [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. - [PIT5479F](/bulletins/10251685.md), 2024-03-18, Service bulletin: SERVICE BRAKES. This Preliminary Information communication provides information to the technician about fluid leaking from the brake caliper piston area found during a service of the vehicle. The substance is actually excess assembly grease from the caliper boot and piston installation. This grease can be cleaned off and the rest of the service completed. - [22860](/bulletins/10248438.md), 2024-01-08, Service bulletin: ELECTRICAL SYSTEM:WIRING; SERVICE BRAKES. Harness Trapped Under MBEC - [PIT5120A](/bulletins/10247720.md), 2023-12-26, Service bulletin: SERVICE BRAKES. Stabilitrak/Traction Control OFF With Red Brake Warning Lamp JSON: [/v1/bulletins/10126151](/v1/bulletins/10126151) [Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Service%20bulletin%20GCUS-9-2682&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F10126151&vehicle=Service%20bulletin%20GCUS-9-2682)