# Service bulletin 18NA235 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: 10212609 - Published by NHTSA: 2022\-05\-31 - Manufacturer's number: 18NA235 - Manufacturer's date: 2022\-01\-21 - NHTSA component: FUEL SYSTEM, OTHER:DELIVERY:FUEL PUMP ## NHTSA's summary This information bulletin advised the tech of possible use of low fuel quality and the possible ramifications in performance in regards to the customers concerns. ## The document - [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2022/MC-10212609-0001.pdf) - [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2022/MC-10212609-9999.pdf) The document is the manufacturer's. This site does not hold it. ## Components Fuel system, Fuel pump ## Vehicles listed - 2015 to 2017 CADILLAC ESCALADE - 2015 to 2016 CADILLAC ESCALADE ESV - 2017 CADILLAC ESCALADE ESV - 2021 CHEVROLET 3500 - 2022 CHEVROLET 3500 - 2022 CHEVROLET 4500 - 2021 to 2022 CHEVROLET 4500HD - 2021 to 2022 CHEVROLET 4500XD - 2021 to 2022 CHEVROLET 5500HD - 2021 to 2022 CHEVROLET 5500XD - 2022 CHEVROLET 6500HD - 2021 to 2022 CHEVROLET 6500XD - 2021 to 2022 CHEVROLET 7500XD - 2021 to 2022 CHEVROLET BLAZER - 2022 CHEVROLET BOLT EUV - 2021 to 2022 CHEVROLET BOLT EV - 2021 to 2022 CHEVROLET CAMARO - 2021 to 2022 CHEVROLET COLORADO - 2021 to 2022 CHEVROLET CORVETTE - 2021 to 2022 CHEVROLET EQUINOX - 2021 CHEVROLET EXPRESS - 2021 CHEVROLET LOW CAB FORWARD 4500 - 2021 CHEVROLET LOW CAB FORWARD 5500 - 2021 CHEVROLET LOW CAB FORWARD 6500 - 2021 CHEVROLET LOW CAB FORWARD 7500 - 2021 to 2022 CHEVROLET MALIBU - 2017 to 2022 CHEVROLET SILVERADO 1500 - 2015 to 2018 CHEVROLET SILVERADO 2500 - 2021 to 2022 CHEVROLET SILVERADO 2500 - 2021 to 2022 CHEVROLET SILVERADO 3500 - 2021 to 2022 CHEVROLET SILVERADO 4500 - 2019 CHEVROLET SILVERADO 5500 - 2021 CHEVROLET SILVERADO 5500 - 2021 to 2022 CHEVROLET SILVERADO 6500 - 2021 to 2022 CHEVROLET SPARK - 2019 to 2022 CHEVROLET SUBURBAN - 2021 to 2022 CHEVROLET SUBURBAN 1500 - 2018 to 2022 CHEVROLET TAHOE - 2021 to 2022 CHEVROLET TRAILBLAZER - 2021 to 2022 CHEVROLET TRAVERSE - 2021 to 2022 CHEVROLET TRAX - 2022 GMC ACADIA - 2022 GMC BRIGHTDROP EV600 - 2022 GMC CANYON - 2022 GMC HUMMER EV PICKUP - 2022 GMC SAVANA - 2019 to 2022 GMC SIERRA 1500 - 2015 to 2018 GMC SIERRA 2500 - 2022 GMC SIERRA 2500 - 2022 GMC SIERRA 3500 - 2015 to 2018 GMC SIERRA DENALI - 2022 GMC TERRAIN - 2022 GMC TERRAIN NA - 2015 to 2017 GMC YUKON - 2019 GMC YUKON - 2022 GMC YUKON - 2015 to 2017 GMC YUKON XL - 2019 GMC YUKON XL - 2022 GMC YUKON XL ## Recalls for the same vehicles and component - [23V013000](/recalls/nhtsa/23V013000.md), 2023-01-19: FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP:CONTROL/DRIVE MODULE - [21V739000](/recalls/nhtsa/21V739000.md), 2021-09-23: FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP:CONTROL/DRIVE MODULE - [19V837000](/recalls/nhtsa/19V837000.md), 2019-11-21: FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP ## Other bulletins for the same vehicles and component - [15NA067](/bulletins/10250040.md), 2024-02-12, Service bulletin: FUEL SYSTEM, DIESEL:DELIVERY:FUEL PUMP. Information on Ordering New Delphi Style Fuel Pump - [15NA067](/bulletins/10246527.md), 2023-12-11, Service bulletin: FUEL SYSTEM, GASOLINE; FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP. Information on Ordering New Delphi Style Fuel Pump - [20NA110](/bulletins/10214200.md), 2022-06-21, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:DIESEL; FUEL SYSTEM, DIESEL:DELIVERY:FUEL PUMP; EQUIPMENT ADAPTIVE/MOBILITY. This service bulletin provides service information for a DEF pump that is unable to build pressure after replacement. - [20NA110](/bulletins/10183168.md), 2020-11-30, Service bulletin: FUEL SYSTEM, DIESEL; FUEL SYSTEM, DIESEL:DELIVERY:FUEL PUMP. This informational bulletin advises the technician on what to do if the DEF pump has been replaced and perform a leak test to prime the pump. - [PIE0523](/bulletins/10161977.md), 2019-07-01, Service bulletin: FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP; FUEL SYSTEM, GASOLINE. This engineering informational bulletin is requesting information for vehicles that has had the fuel injection pump replaced and is still within warranty. - [PIP5596](/bulletins/10147348.md), 2018-11-13, Service bulletin: FUEL SYSTEM, GASOLINE; FUEL SYSTEM, GASOLINE:DELIVERY:HOSES, LINES/PIPING, AND FITTINGS; FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP. 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. - [17NA402](/bulletins/10139241.md), 2018-06-04, Service bulletin: ELECTRICAL SYSTEM:STARTER ASSEMBLY:RELAY; FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY:PRESSURE RELIEF DEVICES; FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP. This technical bulletin provides a procedure to replace relays that may be sticking in cold regions. - [15\-NA\-067](/bulletins/10137254.md), 2018-05-21, Service bulletin: FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP. This informational bulletin provides information for dealership personnel and technicians that when replacing the fuel pump, the vehicle should be serviced with the same style high pressure fuel pipe and SIDI fuel pump it was equipped with. - [17NA335](/bulletins/10134616.md), 2018-04-23, Service bulletin: FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP. This technical bulletin provides a procedure to replace the fuel pump to correct the MIL concerns. - [PIP5411F](/bulletins/10123268.md), 2017-11-14, Service bulletin: FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP; ELECTRICAL SYSTEM. This Preliminary Information communication provides information to the technician about vehicles that may have hesitation or a stalling condition while in ambient temperatures 100 degrees or higher. Technician may find Diagnostic Trouble Codes P2635 and or P018B set. The dealer is advised to replace the in tank fuel pump module assembly to correct the condition. 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