# Service bulletin 20NA110 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: 10214200 - Published by NHTSA: 2022\-06\-21 - Manufacturer's number: 20NA110 - Manufacturer's date: 2022\-01\-13 - NHTSA component: ENGINE AND ENGINE COOLING:ENGINE:DIESEL; FUEL SYSTEM, DIESEL:DELIVERY:FUEL PUMP; EQUIPMENT ADAPTIVE/MOBILITY ## NHTSA's summary This service bulletin provides service information for a DEF pump that is unable to build pressure after replacement. ## The document - [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2022/MC-10214200-0001.pdf) - [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2022/MC-10214200-9999.pdf) The document is the manufacturer's. This site does not hold it. ## Components Engine, Equipment and accessories, Fuel system, Fuel pump ## Vehicles listed - 2022 CADILLAC ESCALADE - 2021 to 2022 CADILLAC ESCALADE ESV - 2021 CADILLAC ESCALADE NA - 2019 CHEVROLET 3500 - 2020 CHEVROLET 3500 - 2021 CHEVROLET 3500 - 2022 CHEVROLET 3500 - 2020 to 2021 CHEVROLET 5500HD - 2019 CHEVROLET 6500 - 2016 to 2022 CHEVROLET COLORADO - 2017 to 2019 CHEVROLET CRUZE - 2018 to 2019 CHEVROLET EQUINOX - 2022 CHEVROLET EQUINOX - 2017 to 2021 CHEVROLET EXPRESS - 2017 to 2022 CHEVROLET SILVERADO 1500 - 2017 to 2019 CHEVROLET SILVERADO 2500 - 2021 to 2022 CHEVROLET SILVERADO 2500 - 2019 to 2022 CHEVROLET SILVERADO 4500 - 2021 CHEVROLET SILVERADO 6500 - 2021 to 2022 CHEVROLET SUBURBAN - 2021 to 2022 CHEVROLET TAHOE - 2016 to 2022 GMC CANYON - 2017 to 2022 GMC SAVANA - 2020 to 2022 GMC SIERRA 1500 - 2017 to 2022 GMC SIERRA 2500 - 2020 to 2022 GMC SIERRA 3500 - 2017 to 2019 GMC SIERRA DENALI - 2017 to 2020 GMC TERRAIN - 2021 to 2022 GMC YUKON - 2021 to 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 - [18V358000](/recalls/nhtsa/18V358000.md), 2018-05-31: FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP ## Other bulletins for the same vehicles and component - [18NA235](/bulletins/10212609.md), 2022-05-31, Service bulletin: FUEL SYSTEM, OTHER:DELIVERY:FUEL PUMP. 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. - [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. - [PIP4783B](/bulletins/10173721.md), 2020-04-13, Service bulletin: FUEL SYSTEM, OTHER:DELIVERY:FUEL PUMP. This Prelimary information informs the dealer of a diagnotic trouble code that may set due to a failed high pressure fuel pump. Dealers are to check fuel pressure as per current testing outlined in GM service information and replace the fuel pump if needed. - [20NA027](/bulletins/10173412.md), 2020-04-06, Service bulletin: ENGINE; FUEL SYSTEM, OTHER:DELIVERY:FUEL PUMP. This technical bulletin provides a procedure to check the fuel pressure and update the ECM if the pressure is over 58 psi. - [19NA065](/bulletins/10160129.md), 2019-05-20, Service bulletin: FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP; FUEL SYSTEM, GASOLINE. This technical bulletin provides a procedure to replace the Aux fuel pump if found the cause of the customers concern. - [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. - [16NA004](/bulletins/10137277.md), 2018-05-21, Service bulletin: FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP; FUEL SYSTEM, GASOLINE; ELECTRICAL SYSTEM. This technical bulletin provides a possible location and repair to a wiring harness that may be contacting the fuel pump cover. - [PIT5363D](/bulletins/10137165.md), 2018-05-21, Service bulletin: ENGINE; FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP. This Preliminary Information communication provides information to the technician about vehicles that may have a click or tick noise heard inside cab with engine running.Technician may find the engine or High Pressure Fuel Pump tick noise that is very loud in the cab of the truck.Comparison with another truck having the same powertrain could show the other truck is quieter.Technician will install an acoustic seal that may be missing or dislodged.Update extends to all engines and all model years. - [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. 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