# Service bulletin 20\-NA\-038 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: 11006377 - Published by NHTSA: 2024\-08\-15 - Manufacturer's number: 20\-NA\-038 - Manufacturer's date: 2024\-07\-23 - NHTSA component: FUEL/PROPULSION SYSTEM ## NHTSA's summary This informational bulletin explains the difference in AFM and DFM engines and what is and is not activated during this occurrence. ## The document - [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2024/MC-11006377-0001.pdf) - [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2024/MC-11006377-9999.pdf) The document is the manufacturer's. This site does not hold it. ## Components Fuel system ## Vehicles listed - 2022 to 2024 CADILLAC CT5 - 2019 to 2020 CADILLAC CT6 - 2016 to 2019 CADILLAC CTS - 2016 CADILLAC CTS\-V - 2018 CADILLAC CTS\-V - 2015 to 2024 CADILLAC ESCALADE - 2015 to 2016 CADILLAC ESCALADE ESV - 2017 to 2023 CADILLAC ESCALADE ESV - 2020 CHEVROLET 3500 - 2021 CHEVROLET 3500 - 2022 CHEVROLET 3500 - 2024 CHEVROLET 3500HD - 2020 CHEVROLET 4500 - 2022 CHEVROLET 4500 - 2020 to 2023 CHEVROLET 4500HD - 2020 to 2022 CHEVROLET 4500XD - 2016 to 2024 CHEVROLET CAMARO - 2014 to 2024 CHEVROLET CORVETTE - 2022 CHEVROLET EQUINOX - 2018 to 2021 CHEVROLET EXPRESS - 2023 to 2024 CHEVROLET EXPRESS 2500 - 2023 to 2024 CHEVROLET EXPRESS 3500 - 2018 to 2023 CHEVROLET EXPRESS CUTAWAY VAN - 2014 to 2024 CHEVROLET SILVERADO 1500 - 2020 to 2024 CHEVROLET SILVERADO 2500 - 2020 to 2024 CHEVROLET SILVERADO 3500 - 2015 to 2022 CHEVROLET SUBURBAN - 2024 CHEVROLET SUBURBAN - 2021 to 2024 CHEVROLET SUBURBAN 1500 - 2015 to 2024 CHEVROLET TAHOE - 2015 to 2016 CHEVROLET TAHOE POLICE PURSUIT - 2015 to 2022 GMC SAVANA - 2024 GMC SAVANA - 2015 to 2017 GMC SAVANA 1500 - 2015 to 2018 GMC SAVANA 2500 - 2023 GMC SAVANA 2500 - 2015 to 2018 GMC SAVANA 3500 - 2023 GMC SAVANA 3500 - 2014 to 2024 GMC SIERRA 1500 - 2020 to 2024 GMC SIERRA 2500 - 2020 to 2024 GMC SIERRA 3500 - 2015 to 2024 GMC YUKON - 2015 to 2019 GMC YUKON DENALI - 2015 to 2018 GMC YUKON DENALI XL - 2015 to 2023 GMC YUKON XL ## Recalls for the same vehicles and component - [25V619000](/recalls/nhtsa/25V619000.md), 2025-09-18: FUEL SYSTEM, DIESEL:STORAGE:TANK ASSEMBLY - [2025429](/recalls/tc/2025429.md), 2025-08-21: Fuel System - [25V536000](/recalls/nhtsa/25V536000.md), 2025-08-21: FUEL SYSTEM, GASOLINE - [2023040](/recalls/tc/2023040.md), 2023-02-02: Fuel System - [23V047000](/recalls/nhtsa/23V047000.md), 2023-02-02: FUEL SYSTEM, DIESEL:STORAGE:TANK ASSEMBLY - [2023013](/recalls/tc/2023013.md), 2023-01-19: Fuel System - [23V013000](/recalls/nhtsa/23V013000.md), 2023-01-19: FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP:CONTROL/DRIVE MODULE - [2021583](/recalls/tc/2021583.md), 2021-09-23: Fuel System - [21V739000](/recalls/nhtsa/21V739000.md), 2021-09-23: FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP:CONTROL/DRIVE MODULE - [21V064000](/recalls/nhtsa/21V064000.md), 2021-02-11: FUEL SYSTEM, GASOLINE:STORAGE:TANK ASSEMBLY ## Other bulletins for the same vehicles and component - [N262558690\-02](/bulletins/11037460.md), 2026-09-23, Service campaign: FUEL/PROPULSION SYSTEM. General Motors has decided to conduct a Voluntary Emission Recall. Certain vehicles may have a condition which can cause the fuel pump power control module to fail. If this were to occur, fuel flow to the engine could be interrupted. Dealers will replace the fuel pump power control module. - [N262558690](/bulletins/11037321.md), 2026-09-16, Service campaign: FUEL/PROPULSION SYSTEM. General Motors has decided to conduct a Voluntary Emission Recall. Certain vehicles may have a condition which can cause the fuel pump power control module to fail. If this were to occur, fuel flow to the engine could be interrupted. Dealers will replace the fuel pump power control module. - [N242452131\-02](/bulletins/11037312.md), 2026-09-15, Emissions: FUEL/PROPULSION SYSTEM. Emission Recall. General Motors has decided to conduct a Voluntary Emission Recall involving certain 2023\-2024 model year Chevrolet Colorado / Silverado 1500 and GMC Canyon / Sierra 1500 vehicles equipped with a 2.7L engine \(RPO L3B\). The Engine Control Module \(ECM\) may not sufficiently control fuel injector flow rate under certain driving conditions. Dealers are to reprogram the ECM. - [N262558690\-01](/bulletins/11036648.md), 2026-09-02, Emissions: FUEL/PROPULSION SYSTEM. Emission Recall. General Motors has decided to conduct a Voluntary Emission Recall. Certain vehicles listed above may have a condition which can cause the fuel pump power control module to fail. If this were to occur, fuel flow to the engine could be interrupted. Dealers will replace the fuel pump power control module. - [N262558690\-01](/bulletins/11036143.md), 2026-08-12, Service campaign: FUEL/PROPULSION SYSTEM. General Motors has decided to conduct a Voluntary Emission Recall. Certain vehicles may have a condition which can cause the fuel pump power control module to fail. If this were to occur, fuel flow to the engine could be interrupted. Dealers will replace the fuel pump power control module. - [N242452130\-01](/bulletins/11035685.md), 2026-08-04, Service campaign: FUEL/PROPULSION SYSTEM. Certain vehicles may have a condition in which the Engine Control Module \(ECM\) does not sufficiently control fuel injector flow rate under certain driving conditions. Dealers are to reprogram the ECM. - [N262558690](/bulletins/11035027.md), 2026-07-16, Service campaign: FUEL/PROPULSION SYSTEM. General Motors has decided to conduct a Voluntary Emission Recall. Certain vehicles may have a condition which can cause the fuel pump power control module to fail. If this were to occur, fuel flow to the engine could be interrupted. Dealers will replace the fuel pump power control module. - [N252516900\-01](/bulletins/11028909.md), 2026-02-19, Emissions: FUEL/PROPULSION SYSTEM. Emission Recall. General Motors has decided to conduct a Voluntary Emission Recall. Certain vehicles listed above may have a condition which can cause the fuel pump power control module to fail. If this were to occur, fuel flow to the engine could be interrupted. Dealers will replace the fuel pump power control module. - [N252516900](/bulletins/11028382.md), 2026-02-05, Emissions: FUEL/PROPULSION SYSTEM. Emission Recall. Additional VINs moved to Open status. - [N252516900](/bulletins/11027870.md), 2026-01-29, Emissions: FUEL/PROPULSION SYSTEM. Emission Recall. Additional VINs Moved to ‘Open’ Status JSON: [/v1/bulletins/11006377](/v1/bulletins/11006377) [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%2020-NA-038&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F11006377&vehicle=Service%20bulletin%2020-NA-038)