# Service bulletin 17\-NA\-066 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: 10239103 - Published by NHTSA: 2023\-07\-13 - Manufacturer's number: 17\-NA\-066 - Manufacturer's date: 2023\-06\-29 - NHTSA component: POWER TRAIN ## NHTSA's summary This service bulletin provides information for automatic transmission Oil Cooler Flush and flow test. ## The document - [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2023/MC-10239103-0001.pdf) - [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2023/MC-10239103-9999.pdf) The document is the manufacturer's. This site does not hold it. ## Components Transmission and driveline ## Vehicles listed - 2016 to 2017 BUICK CASCADA - 2019 BUICK CASCADA - 2010 BUICK ENCLAVE - 2013 BUICK ENCLAVE - 2016 to 2017 BUICK ENCLAVE - 2021 to 2023 BUICK ENCLAVE - 2013 to 2019 BUICK ENCORE - 2021 BUICK ENCORE - 2023 BUICK ENCORE - 2020 BUICK ENCORE GX - 2023 to 2024 BUICK ENCORE GX - 2017 to 2019 BUICK ENVISION - 2022 to 2024 BUICK ENVISION - 2024 BUICK ENVISTA - 2011 BUICK LACROSSE - 2013 to 2015 BUICK LACROSSE - 2017 BUICK LACROSSE - 2019 BUICK LACROSSE - 2020 BUICK LACROSSE - 2013 BUICK LESABRE - 2012 BUICK LUCERNE - 2011 BUICK REGAL - 2013 to 2015 BUICK REGAL - 2017 to 2018 BUICK REGAL - 2020 BUICK REGAL - 2018 BUICK REGAL TOURX - 2020 BUICK REGAL TOURX - 2012 BUICK VERANO - 2016 to 2017 BUICK VERANO - 2014 CADILLAC ATS - 2016 CADILLAC ATS - 2018 to 2019 CADILLAC ATS - 2015 to 2017 CADILLAC ATS\-V - 2020 CADILLAC CT4 - 2023 to 2024 CADILLAC CT4 - 2020 to 2024 CADILLAC CT5 - 2013 CADILLAC CT6 - 2017 to 2018 CADILLAC CT6 - 2020 CADILLAC CT6 - 2010 to 2019 CADILLAC CTS - 2010 to 2012 CADILLAC CTS\-V - 2014 to 2015 CADILLAC CTS\-V - 2018 CADILLAC CTS\-V - 2010 CADILLAC DTS - 2012 CADILLAC DTS - 2010 CADILLAC ESCALADE - 2014 to 2015 CADILLAC ESCALADE - 2017 to 2019 CADILLAC ESCALADE - 2021 to 2022 CADILLAC ESCALADE - 2024 CADILLAC ESCALADE - 2011 CADILLAC ESCALADE ESV - 2014 CADILLAC ESCALADE ESV - 2016 CADILLAC ESCALADE ESV - 2017 to 2019 CADILLAC ESCALADE ESV - 2021 to 2023 CADILLAC ESCALADE ESV - 2010 to 2013 CADILLAC ESCALADE EXT - 2010 to 2011 CADILLAC ESCALADE EXT 1500 - 2010 to 2014 CADILLAC ESCALADE HYBRID - 2011 to 2016 CADILLAC SRX - 2017 CADILLAC SRX - 2019 CADILLAC SRX - 2010 to 2011 CADILLAC STS - 2012 CADILLAC STS - 2018 CADILLAC XT4 - 2019 to 2020 CADILLAC XT4 - 2022 to 2024 CADILLAC XT4 - 2014 to 2015 CADILLAC XT5 - 2017 CADILLAC XT5 - 2020 to 2022 CADILLAC XT5 - 2024 CADILLAC XT5 - 2022 to 2024 CADILLAC XT6 - 2013 to 2014 CADILLAC XTS - 2016 to 2018 CADILLAC XTS - 2020 CADILLAC XTS - 2015 CHEVROLET 3500 - 2016 CHEVROLET 3500 - 2018 to 2019 CHEVROLET 3500 - 2020 CHEVROLET 3500 - 2024 CHEVROLET 3500HD - 2016 CHEVROLET 4500 - 2017 CHEVROLET 4500 - 2019 CHEVROLET 4500 - 2022 CHEVROLET 4500 - 2018 to 2019 CHEVROLET 4500HD - 2021 to 2023 CHEVROLET 4500HD - 2018 to 2022 CHEVROLET 4500XD - 2017 CHEVROLET 5500HD - 2020 to 2021 CHEVROLET 5500HD - 2023 CHEVROLET 5500HD - 2018 to 2022 CHEVROLET 5500XD - 2019 CHEVROLET 6500 - 2019 CHEVROLET 6500HD - 2021 to 2022 CHEVROLET 6500HD - 2010 to 2013 CHEVROLET AVALANCHE - 2014 CHEVROLET AVALANCHE - 2010 to 2013 CHEVROLET AVALANCHE 1500 - 2010 to 2011 CHEVROLET AVEO - 2021 CHEVROLET BLAZER - 2018 CHEVROLET C3500 - 2010 CHEVROLET C4500 - 2011 to 2015 CHEVROLET CAMARO - 2017 to 2019 CHEVROLET CAMARO - 2021 CHEVROLET CAMARO - 2023 CHEVROLET CAMARO - 2011 to 2013 CHEVROLET CAPRICE - 2015 to 2018 CHEVROLET CAPRICE - 2012 to 2015 CHEVROLET CAPRICE POLICE PURSUIT - 2017 CHEVROLET CAPRICE POLICE PURSUIT - 2010 CHEVROLET CAPTIVA - 2012 to 2018 CHEVROLET CAPTIVA - 2010 to 2012 CHEVROLET CAPTIVA SPORT - 2014 to 2017 CHEVROLET CHEVEROLET SS - 2017 CHEVROLET CHEYENNE - 2015 CHEVROLET CITY EXPRESS - 2018 CHEVROLET CITY EXPRESS - 2010 CHEVROLET COBALT - 2010 to 2011 CHEVROLET COLORADO - 2013 to 2014 CHEVROLET COLORADO - 2016 CHEVROLET COLORADO - 2021 to 2024 CHEVROLET COLORADO - 2010 CHEVROLET CORVETTE - 2012 to 2015 CHEVROLET CORVETTE - 2020 to 2023 CHEVROLET CORVETTE - 2011 CHEVROLET CRUZE - 2014 to 2015 CHEVROLET CRUZE - 2018 to 2019 CHEVROLET CRUZE - 2010 to 2022 CHEVROLET EQUINOX - 2024 CHEVROLET EQUINOX - 2011 CHEVROLET EXPRESS - 2013 CHEVROLET EXPRESS - 2015 to 2018 CHEVROLET EXPRESS - 2021 CHEVROLET EXPRESS - 2010 to 2012 CHEVROLET EXPRESS 1500 - 2010 to 2011 CHEVROLET EXPRESS 2500 - 2014 CHEVROLET EXPRESS 2500 - 2023 CHEVROLET EXPRESS 2500 - 2014 CHEVROLET EXPRESS 3500 - 2023 CHEVROLET EXPRESS 3500 - 2014 CHEVROLET EXPRESS 4500 - 2016 CHEVROLET EXPRESS 4500 - 2013 CHEVROLET EXPRESS CUTAWAY - 2010 to 2015 CHEVROLET EXPRESS CUTAWAY VAN - 2017 to 2019 CHEVROLET EXPRESS CUTAWAY VAN - 2022 to 2023 CHEVROLET EXPRESS CUTAWAY VAN - 2011 CHEVROLET G VAN BUS - 2018 CHEVROLET G4500 - 2011 CHEVROLET HHR - 2010 to 2013 CHEVROLET IMPALA - 2015 to 2020 CHEVROLET IMPALA - 2017 CHEVROLET LOW CAB FORWARD 3500 - 2010 CHEVROLET MALIBU - 2012 CHEVROLET MALIBU - 2014 to 2019 CHEVROLET MALIBU - 2021 to 2024 CHEVROLET MALIBU - 2013 CHEVROLET MALIBU ECO - 2010 CHEVROLET MALIBU HYBRID - 2017 CHEVROLET MALIBU HYBRID - 2019 CHEVROLET MALIBU HYBRID - 2010 CHEVROLET MONTE CARLO - 2015 to 2016 CHEVROLET N300 - 2018 CHEVROLET N300 - 2017 CHEVROLET N300 MAX - 2016 CHEVROLET OPTRA - 2016 CHEVROLET S10 - 2018 CHEVROLET S10 - 2010 to 2011 CHEVROLET SILVERADO 1500 - 2013 to 2015 CHEVROLET SILVERADO 1500 - 2017 CHEVROLET SILVERADO 1500 - 2019 to 2023 CHEVROLET SILVERADO 1500 - 2011 to 2015 CHEVROLET SILVERADO 2500 - 2018 to 2024 CHEVROLET SILVERADO 2500 - 2014 to 2022 CHEVROLET SILVERADO 3500 - 2024 CHEVROLET SILVERADO 3500 - 2019 to 2020 CHEVROLET SILVERADO 4500 - 2022 to 2023 CHEVROLET SILVERADO 4500 - 2019 CHEVROLET SILVERADO 5500 - 2021 CHEVROLET SILVERADO 5500 - 2023 CHEVROLET SILVERADO 5500 - 2021 CHEVROLET SILVERADO 6500 - 2023 CHEVROLET SILVERADO 6500 - 2011 CHEVROLET SONIC - 2012 to 2018 CHEVROLET SONIC - 2020 CHEVROLET SONIC - 2013 to 2015 CHEVROLET SPARK - 2018 to 2020 CHEVROLET SPARK - 2022 CHEVROLET SPARK - 2010 to 2018 CHEVROLET SUBURBAN - 2020 CHEVROLET SUBURBAN - 2022 to 2023 CHEVROLET SUBURBAN - 2010 to 2011 CHEVROLET SUBURBAN 1500 - 2022 CHEVROLET SUBURBAN 1500 - 2010 CHEVROLET T SERIES - 2010 to 2011 CHEVROLET TAHOE - 2013 to 2016 CHEVROLET TAHOE - 2018 to 2022 CHEVROLET TAHOE - 2024 CHEVROLET TAHOE - 2010 to 2012 CHEVROLET TAHOE HYBRID - 2011 to 2016 CHEVROLET TAHOE POLICE PURSUIT - 2013 to 2014 CHEVROLET TRAILBLAZER - 2018 to 2020 CHEVROLET TRAILBLAZER ## Recalls for the same vehicles and component - [26V289000](/recalls/nhtsa/26V289000.md), 2026-05-07: POWER TRAIN:TRANSFER CASE \(4\-WHEEL DRIVE\) - [26V085000](/recalls/nhtsa/26V085000.md), 2026-02-13: POWER TRAIN:AUTOMATIC TRANSMISSION:FLUID/LUBRICANT:VALVES/VALVE BODY; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE:SOFTWARE - [2026061](/recalls/tc/2026061.md), 2026-02-12: Powertrain - [2025118](/recalls/tc/2025118.md), 2025-03-06: Powertrain - [25V148000](/recalls/nhtsa/25V148000.md), 2025-03-06: POWER TRAIN:AUTOMATIC TRANSMISSION - [2024637](/recalls/tc/2024637.md), 2024-10-24: Powertrain - [24V797000](/recalls/nhtsa/24V797000.md), 2024-10-24: POWER TRAIN:AUTOMATIC TRANSMISSION:FLUID/LUBRICANT:VALVES/VALVE BODY; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE:SOFTWARE - [22V091000](/recalls/nhtsa/22V091000.md), 2022-02-17: POWER TRAIN:DRIVELINE:DRIVESHAFT - [2022027](/recalls/tc/2022027.md), 2022-01-27: Powertrain - [22V036000](/recalls/nhtsa/22V036000.md), 2022-01-27: POWER TRAIN:DRIVELINE:DRIVESHAFT ## Other bulletins for the same vehicles and component - [25\-NA\-080](/bulletins/11026044.md), 2025-12-03, Service bulletin: POWER TRAIN. This service bulletin provides a procedure to overhaul the control valve to replace a plate and worn down check ball to correct the customers concern of No Reverse, No Shift Past Third Gear \- DTC P2732 Set. - [25\-NA\-080](/bulletins/11024334.md), 2025-10-16, Service bulletin: POWER TRAIN. This service bulletin provides a procedure to overhaul the control valve to replace a plate and worn down check ball to correct the customers concern of No Reverse, No Shift Past Third Gear \- DTC P2732 Set. - [23\-NA\-119](/bulletins/11024331.md), 2025-10-16, Service bulletin: ELECTRICAL SYSTEM; POWER TRAIN. This service bulletin provides service procedure information to correct a customer concern of Shift to Park Displayed on DIC When Vehicle is in\- Park, No Start \- DTC B000A Set. - [N242454441 \-03](/bulletins/11024189.md), 2025-10-09, Service campaign: POWER TRAIN. Certain vehicles listed above, may have a condition where the transmission control valve has worn, resulting in a gradual loss of pressure within the valve. The effects can cause harsh shifting, setting a service engine soon message, reduced engine performance or P0747 diagnostic trouble code. Dealers are to install a new control valve body. The repairs will be made at no charge to the customer. - [22\-NA\-182](/bulletins/11023369.md), 2025-09-27, Service bulletin: POWER TRAIN. This service bulletin advises the technician to check if the transmission cooler lines are twisted to correct customer concerns of Harsh Shift, Shudder, Surge, Stall, Transmission Overheating and/or High Transmission Fluid Temperature. - [N252494003\-01](/bulletins/11019752.md), 2025-06-26, Service campaign: POWER TRAIN. Certain vehicles listed above, may have a condition where the connecting rod and/or crankshaft engine components in these vehicles may have manufacturing defects that can lead to engine damage and engine failure. This special coverage covers if an engine failure occurs in the vehicle as a result of the condition described above for a period of 10 years or 150,000 miles \(240,000 km\), whichever occurs first, from the date the vehicle was originally placed in service, regardless of ownership. For vehicles covered by Vehicle Service Contracts, all eligible claims with repair orders on or after May 23, 2025, are covered by this special coverage and must be submitted using the labor operation codes provided with this bulletin. Claims with repair orders prior to May 23, 2025, must be submitted to the Service Contract provider. Vehicle owners or lessees who paid for repairs referenced in this Special Coverage \(“Customers”\) are eligible for reimbursement of their reasonable and customary expenses in accordance with the procedures specified below. The conditional right to reimbursement is provided by GM solely in the interest of customer satisfaction and is personal to Customers. Customers may not assign and GM does not consent to any assignment of any Customer’s right to submit reimbursement claims, or to receive reimbursement, or any other rights granted by this Special Coverage to any third party, including but not limited to service contract providers, and this Special Coverage is not intended to and does not confer any third party beneficiary, subrogation or contribution rights, or any other rights to reimbursement, against GM, whether in law, equity or otherwise, on any third parties. Dealers are to replace the engine. The repairs will be made at no charge to the customer. - [PI0281L](/bulletins/11019516.md), 2025-06-12, Service bulletin: STEERING; POWER TRAIN; SUSPENSION. This preliminary informational \(PI\) bulletin provides information to dealership personnel that may be helpful when addressing underbody component corrosion with customers. - [N242480631\-02](/bulletins/11018568.md), 2025-05-27, Service campaign: POWER TRAIN. Certain vehicles listed above, may have a condition where the transmission control valve has worn, resulting in a gradual loss of pressure within the valve. The effects can cause harsh shifting, setting a service engine soon message, reduced engine performance or P0747 diagnostic trouble code. This special coverage covers vehicles that return after TCM Update Product Safety N242480630 and have P0747 condition described above for a period of 15 years or 150,000 miles \(240,000 km\), whichever occurs first, from the date the vehicle was originally placed in service, regardless of ownership. For vehicles covered by Vehicle Service Contracts, all eligible claims with repair orders on or after March 6, 2025, are covered by this special coverage and must be submitted using the labor operation codes provided with this bulletin. Claims with repair orders prior to March 6, 2025, must be submitted to the Service Contract provider. Vehicle owners or lessees who paid for repairs referenced in this Special Coverage \(“Customers”\) are eligible for reimbursement of their reasonable and customary expenses in accordance with the procedures specified below. The conditional right to reimbursement is provided by GM solely in the interest of customer satisfaction and is personal to Customers. Customers may not assign and GM does not consent to any assignment of any Customer’s right to submit reimbursement claims, or to receive reimbursement, or any other rights granted by this Special Coverage to any third party, including but not limited to service contract providers, and this Special Coverage is not intended to and does not confer any third party beneficiary, subrogation or contribution rights, or any other rights to reimbursement, against GM, whether in law, equity or otherwise, on any third parties. Dealers are to install a new control valve body. The repairs will be made at no charge to the customer. - [N242480631\-01](/bulletins/11018535.md), 2025-05-22, Service campaign: POWER TRAIN. Certain vehicles listed above, may have a condition where the transmission control valve has worn, resulting in a gradual loss of pressure within the valve. The effects can cause harsh shifting, setting a service engine soon message, reduced engine performance or P0747 diagnostic trouble code. This special coverage covers vehicles that return after TCM Update Product Safety N242480630 and have P0747 condition described above for a period of 15 years or 150,000 miles \(240,000 km\), whichever occurs first, from the date the vehicle was originally placed in service, regardless of ownership. For vehicles covered by Vehicle Service Contracts, all eligible claims with repair orders on or after March 6, 2025, are covered by this special coverage and must be submitted using the labor operation codes provided with this bulletin. Claims with repair orders prior to March 6, 2025, must be submitted to the Service Contract provider. Vehicle owners or lessees who paid for repairs referenced in this Special Coverage \(“Customers”\) are eligible for reimbursement of their reasonable and customary expenses in accordance with the procedures specified below. The conditional right to reimbursement is provided by GM solely in the interest of customer satisfaction and is personal to Customers. Customers may not assign and GM does not consent to any assignment of any Customer’s right to submit reimbursement claims, or to receive reimbursement, or any other rights granted by this Special Coverage to any third party, including but not limited to service contract providers, and this Special Coverage is not intended to and does not confer any third party beneficiary, subrogation or contribution rights, or any other rights to reimbursement, against GM, whether in law, equity or otherwise, on any third parties. Dealers are to install a new control valve body. The repairs will be made at no charge to the customer. - [25\-NA\-080](/bulletins/11017317.md), 2025-04-29, Service bulletin: POWER TRAIN. This service bulletin provides a procedure to overhaul the control valve to replace a plate and worn down check ball to correct the customers concern of No Reverse, No Shift Past Third Gear \- DTC P2732 Set. JSON: [/v1/bulletins/10239103](/v1/bulletins/10239103) [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%2017-NA-066&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F10239103&vehicle=Service%20bulletin%2017-NA-066)