# Service bulletin 08\-07\-30\-026I 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: 11009088 - Published by NHTSA: 2024\-10\-24 - Manufacturer's number: 08\-07\-30\-026I - Manufacturer's date: 2024\-09\-16 - 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/2024/MC-11009088-0001.pdf) - [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2024/MC-11009088-9999.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 2025 BUICK ENCLAVE - 2013 to 2022 BUICK ENCORE - 2023 to 2025 BUICK ENCORE - 2020 to 2025 BUICK ENCORE GX - 2016 to 2025 BUICK ENVISION - 2024 to 2025 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 2019 CADILLAC ATS\-V - 2020 to 2025 CADILLAC CT4 - 2020 to 2025 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 - 2014 to 2017 CADILLAC ELR - 2007 to 2025 CADILLAC ESCALADE - 2007 to 2016 CADILLAC ESCALADE ESV - 2017 to 2025 CADILLAC ESCALADE ESV - 2007 to 2014 CADILLAC ESCALADE EXT - 2007 to 2011 CADILLAC ESCALADE EXT 1500 - 2008 to 2014 CADILLAC ESCALADE HYBRID - 2025 CADILLAC ESCALADE IQ - 2023 to 2025 CADILLAC LYRIQ - 2007 to 2016 CADILLAC SRX - 2007 to 2011 CADILLAC STS - 2012 CADILLAC STS - 2007 to 2009 CADILLAC XLR - 2018 CADILLAC XT4 - 2019 to 2025 CADILLAC XT4 - 2013 to 2016 CADILLAC XT5 - 2017 to 2025 CADILLAC XT5 - 2020 to 2025 CADILLAC XT6 - 2013 to 2019 CADILLAC XTS - 2020 CADILLAC XTS - 2014 to 2015 CHEVROLET 3500 - 2016 CHEVROLET 3500 - 2016 CHEVROLET 4500 - 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 2011 CHEVROLET AVEO - 2007 to 2009 CHEVROLET BLAZER - 2019 to 2025 CHEVROLET BLAZER - 2024 to 2025 CHEVROLET BLAZER EV - 2022 to 2023 CHEVROLET BOLT EUV - 2017 to 2023 CHEVROLET BOLT EV - 2024 CHEVROLET BOLT EV - 2008 to 2010 CHEVROLET C4500 - 2008 CHEVROLET C4500 NA - 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 - 2008 to 2010 CHEVROLET COBALT SS - 2007 to 2012 CHEVROLET COLORADO - 2013 to 2014 CHEVROLET COLORADO - 2015 to 2025 CHEVROLET COLORADO - 2007 to 2025 CHEVROLET CORVETTE - 2024 CHEVROLET CORVETTE E\-RAY - 2007 to 2008 CHEVROLET CORVETTE Z06 - 2009 to 2011 CHEVROLET CORVETTE ZR1 - 2010 to 2019 CHEVROLET CRUZE - 2007 to 2025 CHEVROLET EQUINOX - 2024 to 2025 CHEVROLET EQUINOX EV - 2007 to 2021 CHEVROLET EXPRESS - 2007 to 2014 CHEVROLET EXPRESS 1500 - 2007 to 2019 CHEVROLET EXPRESS 2500 - 2023 to 2024 CHEVROLET EXPRESS 2500 - 2007 to 2024 CHEVROLET EXPRESS 3500 - 2009 CHEVROLET EXPRESS 4500 - 2012 CHEVROLET EXPRESS 4500 - 2014 CHEVROLET EXPRESS 4500 - 2016 CHEVROLET EXPRESS 4500 - 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 - 2007 CHEVROLET OPTRA - 2007 CHEVROLET S10 - 2007 to 2025 CHEVROLET SILVERADO 1500 - 2007 to 2025 CHEVROLET SILVERADO 2500 - 2007 to 2024 CHEVROLET SILVERADO 3500 - 2019 to 2024 CHEVROLET SILVERADO 4500 - 2019 to 2021 CHEVROLET SILVERADO 5500 - 2023 to 2024 CHEVROLET SILVERADO 5500 - 2019 CHEVROLET SILVERADO 6500 - 2021 to 2023 CHEVROLET SILVERADO 6500 - 2025 CHEVROLET SILVERADO 6500 - 2024 to 2025 CHEVROLET SILVERADO EV - 2018 CHEVROLET SILVERADO LT - 2011 CHEVROLET SONIC - 2012 to 2020 CHEVROLET SONIC - 2013 to 2022 CHEVROLET SPARK - 2014 to 2017 CHEVROLET SPARK EV - 2007 CHEVROLET SSR - 2007 to 2022 CHEVROLET SUBURBAN - 2024 CHEVROLET SUBURBAN - 2007 to 2011 CHEVROLET SUBURBAN 1500 - 2021 to 2025 CHEVROLET SUBURBAN 1500 - 2008 to 2011 CHEVROLET SUBURBAN 2500 - 2007 to 2025 CHEVROLET TAHOE - 2008 to 2013 CHEVROLET TAHOE HYBRID - 2010 to 2016 CHEVROLET TAHOE POLICE PURSUIT - 2007 to 2009 CHEVROLET TRAILBLAZER - 2013 to 2015 CHEVROLET TRAILBLAZER - 2017 to 2020 CHEVROLET TRAILBLAZER - 2021 to 2025 CHEVROLET TRAILBLAZER - 2007 to 2009 CHEVROLET TRAILBLAZER 360 - 2008 CHEVROLET TRAVERSE - 2009 to 2025 CHEVROLET TRAVERSE - 2013 to 2025 CHEVROLET TRAX - 2007 to 2009 CHEVROLET UPLANDER - 2011 to 2019 CHEVROLET VOLT - 2019 CHEVROLET duplicate SILVERADO 5500 - 2024 GMC 3500HD - 2007 to 2025 GMC ACADIA - 2007 to 2009 GMC C4500 - 2007 to 2013 GMC CANYON - 2015 to 2025 GMC CANYON - 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 - 2022 to 2025 GMC HUMMER EV PICKUP - 2010 GMC SANANA - 2007 to 2022 GMC SAVANA - 2024 GMC SAVANA - 2007 to 2017 GMC SAVANA 1500 - 2007 to 2018 GMC SAVANA 2500 - 2023 GMC SAVANA 2500 - 2007 to 2018 GMC SAVANA 3500 - 2023 GMC SAVANA 3500 - 2013 to 2021 GMC SAVANA CUTAWAY VAN - 2007 to 2025 GMC SIERRA 1500 - 2007 to 2024 GMC SIERRA 2500 - 2007 to 2024 GMC SIERRA 3500 - 2007 to 2020 GMC SIERRA DENALI - 2024 to 2025 GMC SIERRA EV - 2009 to 2025 GMC TERRAIN - 2007 to 2025 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 2025 GMC YUKON XL - 2007 to 2011 GMC YUKON XL 1500 - 2012 GMC YUKON XL 1500 - 2023 GMC YUKON XL 1500 - 2007 to 2011 GMC YUKON XL 2500 ## 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. - [N252517790](/bulletins/11024270.md), 2025-10-14, Service campaign: POWER TRAIN. Certain vehicles, equipped with 8L80 or 8L90 Transmissions, may have a condition in which the reaction carrier cracks. Dealers are to replace the reaction carrier. - [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. JSON: [/v1/bulletins/11009088](/v1/bulletins/11009088) [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%2008-07-30-026I&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F11009088&vehicle=Service%20bulletin%2008-07-30-026I)