# Service bulletin 08\-07\-30\-026H 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: 10237387 - Published by NHTSA: 2023\-06\-06 - Manufacturer's number: 08\-07\-30\-026H - Manufacturer's date: 2023\-05\-30 - NHTSA component: POWER TRAIN ## NHTSA's summary This service bulletin provides information on some vehicles that may rock or move slightly forward or rearward while in Park at start up after cold soak. This condition may be accompanied by a clunk noise. This is a slight movement that is more often seen visually, rather than felt, when viewed from the outside and using the auto\-start feature, if equipped. ## The document - [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2023/MC-10237387-0001.pdf) - [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2023/MC-10237387-9999.pdf) The document is the manufacturer's. This site does not hold it. ## Components Transmission and driveline ## Vehicles listed - 2007 to 2009 BUICK ALLURE - 2016 to 2019 BUICK CASCADA - 2008 to 2024 BUICK ENCLAVE - 2013 to 2022 BUICK ENCORE - 2023 BUICK ENCORE - 2020 to 2024 BUICK ENCORE GX - 2016 to 2024 BUICK ENVISION - 2024 BUICK ENVISTA - 2007 to 2019 BUICK LACROSSE - 2020 BUICK LACROSSE - 2013 BUICK LESABRE - 2007 to 2011 BUICK LUCERNE - 2012 BUICK LUCERNE - 2007 BUICK RAINIER - 2008 to 2010 BUICK REGAL - 2011 to 2020 BUICK REGAL - 2018 BUICK REGAL TOURX - 2020 BUICK REGAL TOURX - 2007 BUICK RENDEZVOUS - 2007 BUICK TERRAZA - 2008 BUICK TERRAZA - 2012 to 2017 BUICK VERANO - 2013 to 2019 CADILLAC ATS - 2015 to 2018 CADILLAC ATS\-V - 2020 to 2024 CADILLAC CT4 - 2020 to 2024 CADILLAC CT5 - 2013 to 2015 CADILLAC CT6 - 2016 to 2020 CADILLAC CT6 - 2021 CADILLAC CT6 - 2007 to 2019 CADILLAC CTS - 2007 CADILLAC CTS\-V - 2010 to 2012 CADILLAC CTS\-V - 2014 to 2016 CADILLAC CTS\-V - 2018 CADILLAC CTS\-V - 2007 to 2011 CADILLAC DTS - 2012 CADILLAC DTS - 2007 to 2024 CADILLAC ESCALADE - 2007 to 2016 CADILLAC ESCALADE ESV - 2017 to 2023 CADILLAC ESCALADE ESV - 2007 to 2014 CADILLAC ESCALADE EXT - 2007 to 2011 CADILLAC ESCALADE EXT 1500 - 2008 to 2014 CADILLAC ESCALADE HYBRID - 2021 CADILLAC ESCALADE NA - 2007 to 2016 CADILLAC SRX - 2017 to 2019 CADILLAC SRX - 2007 to 2011 CADILLAC STS - 2012 CADILLAC STS - 2007 to 2009 CADILLAC XLR - 2018 CADILLAC XT4 - 2019 to 2024 CADILLAC XT4 - 2013 to 2016 CADILLAC XT5 - 2017 to 2024 CADILLAC XT5 - 2020 to 2024 CADILLAC XT6 - 2013 to 2019 CADILLAC XTS - 2020 CADILLAC XTS - 2019 CHEVROLET 6500 - 2007 to 2013 CHEVROLET AVALANCHE - 2014 CHEVROLET AVALANCHE - 2007 to 2013 CHEVROLET AVALANCHE 1500 - 2007 CHEVROLET AVALANCHE 2500 - 2013 CHEVROLET AVALANCHE 2500 - 2007 to 2012 CHEVROLET AVEO - 2007 to 2009 CHEVROLET BLAZER - 2019 to 2024 CHEVROLET BLAZER - 2010 to 2024 CHEVROLET CAMARO - 2011 to 2018 CHEVROLET CAPRICE - 2012 to 2017 CHEVROLET CAPRICE POLICE PURSUIT - 2008 to 2018 CHEVROLET CAPTIVA - 2009 CHEVROLET CAPTIVA SPORT - 2010 to 2014 CHEVROLET CAPTIVA SPORT - 2014 to 2017 CHEVROLET CHEVEROLET SS - 2015 to 2016 CHEVROLET CITY EXPRESS - 2018 CHEVROLET CITY EXPRESS - 2007 to 2010 CHEVROLET COBALT - 2011 to 2017 CHEVROLET COBALT - 2008 to 2010 CHEVROLET COBALT SS - 2007 to 2012 CHEVROLET COLORADO - 2013 to 2014 CHEVROLET COLORADO - 2015 to 2024 CHEVROLET COLORADO - 2007 to 2023 CHEVROLET CORVETTE - 2007 to 2008 CHEVROLET CORVETTE Z06 - 2009 CHEVROLET CORVETTE ZR1 - 2010 to 2019 CHEVROLET CRUZE - 2007 to 2024 CHEVROLET EQUINOX - 2007 to 2021 CHEVROLET EXPRESS - 2007 to 2012 CHEVROLET EXPRESS 1500 - 2014 CHEVROLET EXPRESS 1500 - 2007 to 2011 CHEVROLET EXPRESS 2500 - 2014 CHEVROLET EXPRESS 2500 - 2023 CHEVROLET EXPRESS 2500 - 2007 to 2010 CHEVROLET EXPRESS 3500 - 2012 CHEVROLET EXPRESS 3500 - 2014 CHEVROLET EXPRESS 3500 - 2023 CHEVROLET EXPRESS 3500 - 2009 CHEVROLET EXPRESS 4500 - 2012 CHEVROLET EXPRESS 4500 - 2014 CHEVROLET EXPRESS 4500 - 2016 CHEVROLET EXPRESS 4500 - 2013 CHEVROLET EXPRESS CUTAWAY - 2007 to 2023 CHEVROLET EXPRESS CUTAWAY VAN - 2007 to 2011 CHEVROLET G VAN BUS - 2007 to 2008 CHEVROLET G1500 - 2008 CHEVROLET G3500 - 2018 CHEVROLET G4500 - 2007 to 2011 CHEVROLET HHR - 2007 to 2020 CHEVROLET IMPALA - 2008 CHEVROLET LUMINA - 2014 CHEVROLET LUMINA - 2007 to 2024 CHEVROLET MALIBU - 2007 CHEVROLET MALIBU CLASSIC - 2013 to 2014 CHEVROLET MALIBU ECO - 2008 to 2010 CHEVROLET MALIBU HYBRID - 2016 to 2019 CHEVROLET MALIBU HYBRID - 2007 CHEVROLET MALIBU MAXX - 2007 CHEVROLET MONTE CARLO - 2008 CHEVROLET MONTE CARLO - 2010 CHEVROLET MONTE CARLO - 2014 to 2016 CHEVROLET N300 - 2018 CHEVROLET N300 - 2017 CHEVROLET N300 MAX - 2021 CHEVROLET ONIX - 2007 CHEVROLET OPTRA - 2016 CHEVROLET OPTRA - 2017 CHEVROLET ORLANDO - 2007 CHEVROLET S10 - 2016 to 2018 CHEVROLET S10 - 2007 to 2024 CHEVROLET SILVERADO 1500 - 2007 to 2024 CHEVROLET SILVERADO 2500 - 2007 to 2024 CHEVROLET SILVERADO 3500 - 2019 to 2023 CHEVROLET SILVERADO 4500 - 2019 to 2021 CHEVROLET SILVERADO 5500 - 2023 CHEVROLET SILVERADO 5500 - 2019 CHEVROLET SILVERADO 6500 - 2021 to 2023 CHEVROLET SILVERADO 6500 - 2011 CHEVROLET SONIC - 2012 to 2020 CHEVROLET SONIC - 2013 to 2022 CHEVROLET SPARK - 2018 CHEVROLET SS - 2007 CHEVROLET SSR - 2007 to 2024 CHEVROLET SUBURBAN - 2007 to 2011 CHEVROLET SUBURBAN 1500 - 2021 to 2022 CHEVROLET SUBURBAN 1500 - 2008 to 2011 CHEVROLET SUBURBAN 2500 - 2007 to 2024 CHEVROLET TAHOE - 2008 to 2013 CHEVROLET TAHOE HYBRID - 2010 to 2016 CHEVROLET TAHOE POLICE PURSUIT - 2007 to 2009 CHEVROLET TRAILBLAZER - 2013 to 2014 CHEVROLET TRAILBLAZER - 2017 to 2020 CHEVROLET TRAILBLAZER - 2021 to 2024 CHEVROLET TRAILBLAZER - 2007 to 2009 CHEVROLET TRAILBLAZER 360 - 2008 CHEVROLET TRAVERSE - 2009 to 2024 CHEVROLET TRAVERSE - 2013 to 2024 CHEVROLET TRAX - 2007 to 2009 CHEVROLET UPLANDER - 2011 to 2019 CHEVROLET VOLT - 2019 CHEVROLET duplicate SILVERADO 5500 - 2024 GMC 3500HD - 2007 to 2023 GMC ACADIA - 2007 to 2013 GMC CANYON - 2015 to 2024 GMC CANYON - 2007 to 2015 GMC DENALI - 2007 to 2009 GMC ENVOY - 2010 to 2013 GMC ENVOY - 2007 to 2009 GMC ENVOY 360 - 2007 GMC ENVOY DENALI - 2009 GMC EXPRESS - 2007 to 2011 GMC G VAN BUS - 2007 to 2008 GMC G1500 - 2017 to 2018 GMC G3500 - 2007 to 2024 GMC SAVANA - 2007 to 2017 GMC SAVANA 1500 - 2007 to 2018 GMC SAVANA 2500 - 2007 to 2018 GMC SAVANA 3500 - 2007 to 2024 GMC SIERRA 1500 - 2007 to 2024 GMC SIERRA 2500 - 2007 to 2024 GMC SIERRA 3500 - 2007 to 2020 GMC SIERRA DENALI - 2009 to 2024 GMC TERRAIN - 2022 GMC TERRAIN NA - 2007 to 2023 GMC YUKON - 2007 to 2013 GMC YUKON DENALI - 2015 to 2019 GMC YUKON DENALI - 2007 to 2018 GMC YUKON DENALI XL - 2008 to 2013 GMC YUKON HYBRID - 2007 to 2011 GMC YUKON XL - 2012 to 2014 GMC YUKON XL - 2015 to 2024 GMC YUKON XL - 2007 to 2011 GMC YUKON XL 1500 - 2012 GMC YUKON XL 1500 - 2007 to 2011 GMC YUKON XL 2500 - 2012 to 2013 GMC YUKON XL 2500 - 2007 to 2010 HUMMER H2 - 2007 to 2009 HUMMER H2 SUT - 2007 to 2010 HUMMER H3 - 2009 HUMMER H3 SUT - 2007 HUMMER H4 - 2007 to 2009 OPEL GT - 2008 to 2010 PONTIAC G3 - 2008 PONTIAC G4 ## 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 - [2026060](/recalls/tc/2026060.md), 2026-02-12: Powertrain - [26V083000](/recalls/nhtsa/26V083000.md), 2026-02-12: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE:SOFTWARE; POWER TRAIN:AUTOMATIC TRANSMISSION:FLUID/LUBRICANT:VALVES/VALVE BODY - [2025118](/recalls/tc/2025118.md), 2025-03-06: Powertrain - [25V148000](/recalls/nhtsa/25V148000.md), 2025-03-06: POWER TRAIN:AUTOMATIC TRANSMISSION - [2024679](/recalls/tc/2024679.md), 2024-11-07: Powertrain - [24V839000](/recalls/nhtsa/24V839000.md), 2024-11-07: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE:SOFTWARE - [2024637](/recalls/tc/2024637.md), 2024-10-24: Powertrain ## Other bulletins for the same vehicles and component - [N252502891\-01](/bulletins/11036308.md), 2026-08-20, Service campaign: POWER TRAIN. Certain vehicles may have a condition in which the internal differential nut was cross threaded or missing during assembly. Dealers will review the vehicles service history in IVH, and if necessary, replace the rear electric drive transmission module. - [N252502890\-01](/bulletins/11036307.md), 2026-08-20, Service campaign: POWER TRAIN. Certain vehicles may have a condition in which the internal differential nut was cross threaded or missing during assembly. Dealers will review the vehicles service history in IVH, and if necessary, replace the front electric drive transmission module. - [N242471460\-01](/bulletins/11036306.md), 2026-08-20, Service campaign: POWER TRAIN. Certain vehicles may have been built with an Electric Drive Unit mounting bolt that is too long, causing damage to the Drive Unit case. Dealers will inspect and replace the Electrical Drive Unit if necessary. - [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. - [24\-NA\-262](/bulletins/11026024.md), 2025-12-03, Service bulletin: POWER TRAIN. This bulletin helps aid the tech in possible 10L100 transmission noise that may be normal or abnormal depending on the concern noted. - [25\-NA\-108](/bulletins/11024499.md), 2025-10-27, Service bulletin: POWER TRAIN; ELECTRICAL SYSTEM. This bulletin provides a procedure to inspect and verify the drive shafts are over extending past the 5mm tolerance, causing the customers concern of a fluid leak under the vehicle. - [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. JSON: [/v1/bulletins/10237387](/v1/bulletins/10237387) [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%2008-07-30-026H&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F10237387&vehicle=Service%20bulletin%2008-07-30-026H)