# Service bulletin 16\-NA\-109 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: 11014577 - Published by NHTSA: 2025\-02\-28 - Manufacturer's number: 16\-NA\-109 - Manufacturer's date: 2025\-02\-18 - NHTSA component: STEERING ## NHTSA's summary This service bulletin provides a procedure inspecting for excess grease or Sealant on the Exterior of the steering gear due to seeing grease or sealant on certain locations on the gear. ## The document - [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2025/MC-11014577-0001.pdf) - [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2025/MC-11014577-9999.pdf) The document is the manufacturer's. This site does not hold it. ## Components Steering ## Vehicles listed - 2022 BRIGHTDROP EV600 - 2024 BRIGHTDROP ZEVO 400 - 2023 to 2024 BRIGHTDROP ZEVO 600 - 2016 to 2019 BUICK CASCADA - 2013 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 - 2013 to 2019 BUICK LACROSSE - 2020 BUICK LACROSSE - 2013 BUICK LESABRE - 2013 to 2020 BUICK REGAL - 2018 BUICK REGAL TOURX - 2020 BUICK REGAL TOURX - 2013 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 - 2013 to 2019 CADILLAC CTS - 2014 to 2016 CADILLAC CTS\-V - 2018 CADILLAC CTS\-V - 2014 to 2017 CADILLAC ELR - 2013 to 2025 CADILLAC ESCALADE - 2013 to 2016 CADILLAC ESCALADE ESV - 2017 to 2025 CADILLAC ESCALADE ESV - 2013 to 2014 CADILLAC ESCALADE EXT - 2013 to 2014 CADILLAC ESCALADE HYBRID - 2025 CADILLAC ESCALADE IQ - 2023 to 2025 CADILLAC LYRIQ - 2025 CADILLAC OPTIQ - 2013 to 2016 CADILLAC SRX - 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 - 2017 to 2019 CHEVROLET 3500 - 2020 CHEVROLET 3500 - 2021 CHEVROLET 3500 - 2022 CHEVROLET 3500 - 2024 CHEVROLET 3500HD - 2016 CHEVROLET 4500 - 2017 to 2019 CHEVROLET 4500 - 2020 CHEVROLET 4500 - 2022 CHEVROLET 4500 - 2017 to 2023 CHEVROLET 4500HD - 2017 to 2022 CHEVROLET 4500XD - 2017 to 2023 CHEVROLET 5500HD - 2018 to 2022 CHEVROLET 5500XD - 2019 CHEVROLET 6500 - 2019 to 2023 CHEVROLET 6500HD - 2013 CHEVROLET AVALANCHE - 2014 CHEVROLET AVALANCHE - 2013 CHEVROLET AVALANCHE 1500 - 2013 CHEVROLET AVALANCHE 2500 - 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 - 2025 CHEVROLET BRIGHTDROP 400 - 2025 CHEVROLET BRIGHTDROP 600 - 2018 CHEVROLET C3500 - 2013 to 2024 CHEVROLET CAMARO - 2013 to 2018 CHEVROLET CAPRICE - 2013 to 2017 CHEVROLET CAPRICE POLICE PURSUIT - 2013 to 2018 CHEVROLET CAPTIVA - 2013 to 2014 CHEVROLET CAPTIVA SPORT - 2014 to 2017 CHEVROLET CHEVEROLET SS - 2015 to 2016 CHEVROLET CITY EXPRESS - 2018 CHEVROLET CITY EXPRESS - 2013 to 2014 CHEVROLET COLORADO - 2015 to 2025 CHEVROLET COLORADO - 2013 to 2025 CHEVROLET CORVETTE - 2024 CHEVROLET CORVETTE E\-RAY - 2013 to 2019 CHEVROLET CRUZE - 2013 to 2025 CHEVROLET EQUINOX - 2024 to 2025 CHEVROLET EQUINOX EV - 2013 to 2021 CHEVROLET EXPRESS - 2023 to 2025 CHEVROLET EXPRESS - 2013 to 2014 CHEVROLET EXPRESS 1500 - 2013 to 2019 CHEVROLET EXPRESS 2500 - 2023 to 2024 CHEVROLET EXPRESS 2500 - 2013 to 2024 CHEVROLET EXPRESS 3500 - 2014 CHEVROLET EXPRESS 4500 - 2016 CHEVROLET EXPRESS 4500 - 2013 to 2024 CHEVROLET EXPRESS CUTAWAY VAN - 2018 CHEVROLET G4500 - 2013 to 2020 CHEVROLET IMPALA - 2016 to 2019 CHEVROLET LOW CAB FORWARD 3500 - 2016 to 2017 CHEVROLET LOW CAB FORWARD 4500 - 2016 to 2017 CHEVROLET LOW CAB FORWARD 5500 - 2018 CHEVROLET LOW CAB FORWARD 6500 - 2025 CHEVROLET LOW CAB FORWARD N SERIES - 2014 CHEVROLET LUMINA - 2013 to 2025 CHEVROLET MALIBU - 2013 to 2014 CHEVROLET MALIBU ECO - 2016 to 2019 CHEVROLET MALIBU HYBRID - 2013 to 2025 CHEVROLET SILVERADO 1500 - 2013 to 2025 CHEVROLET SILVERADO 2500 - 2013 to 2025 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 - 2013 to 2020 CHEVROLET SONIC - 2013 to 2022 CHEVROLET SPARK - 2014 to 2017 CHEVROLET SPARK EV - 2013 to 2024 CHEVROLET SUBURBAN - 2021 to 2025 CHEVROLET SUBURBAN 1500 - 2013 to 2025 CHEVROLET TAHOE - 2013 CHEVROLET TAHOE HYBRID - 2013 to 2016 CHEVROLET TAHOE POLICE PURSUIT - 2013 to 2015 CHEVROLET TRAILBLAZER - 2017 to 2020 CHEVROLET TRAILBLAZER - 2021 to 2025 CHEVROLET TRAILBLAZER - 2013 to 2025 CHEVROLET TRAVERSE - 2013 to 2025 CHEVROLET TRAX - 2013 to 2019 CHEVROLET VOLT - 2019 CHEVROLET duplicate SILVERADO 5500 - 2024 GMC 3500HD - 2013 to 2025 GMC ACADIA - 2013 GMC CANYON - 2015 to 2025 GMC CANYON - 2013 GMC ENVOY - 2017 to 2018 GMC G3500 - 2022 to 2025 GMC HUMMER EV PICKUP - 2013 to 2025 GMC SAVANA - 2013 to 2017 GMC SAVANA 1500 - 2013 to 2018 GMC SAVANA 2500 - 2023 GMC SAVANA 2500 - 2013 to 2018 GMC SAVANA 3500 - 2023 GMC SAVANA 3500 - 2025 GMC SAVANA 3500 - 2013 to 2024 GMC SAVANA CUTAWAY VAN - 2013 to 2025 GMC SIERRA 1500 - 2013 to 2025 GMC SIERRA 2500 - 2013 to 2025 GMC SIERRA 3500 - 2013 to 2020 GMC SIERRA DENALI - 2024 to 2025 GMC SIERRA EV - 2013 to 2025 GMC TERRAIN - 2013 to 2025 GMC YUKON - 2013 GMC YUKON DENALI - 2015 to 2019 GMC YUKON DENALI - 2013 to 2018 GMC YUKON DENALI XL - 2013 GMC YUKON HYBRID - 2013 to 2014 GMC YUKON XL - 2015 to 2025 GMC YUKON XL - 2023 GMC YUKON XL 1500 - 2013 GMC YUKON XL 2500 ## Recalls for the same vehicles and component - [2026307](/recalls/tc/2026307.md), 2026-06-23: Steering - [26V399000](/recalls/nhtsa/26V399000.md), 2026-06-23: STEERING - [2025144](/recalls/tc/2025144.md), 2025-03-20: Steering - [25V175000](/recalls/nhtsa/25V175000.md), 2025-03-20: STEERING:ELECTRIC POWER ASSIST SYSTEM - [23V549000](/recalls/nhtsa/23V549000.md), 2023-08-03: STEERING - [2021380](/recalls/tc/2021380.md), 2021-06-17: Steering - [21V455000](/recalls/nhtsa/21V455000.md), 2021-06-17: STEERING:STEERING CONTROL MODULE - [2020291](/recalls/tc/2020291.md), 2020-06-25: Steering - [2019056](/recalls/tc/2019056.md), 2019-02-08: Steering - [19V086000](/recalls/nhtsa/19V086000.md), 2019-02-07: STEERING:ELECTRIC POWER ASSIST SYSTEM ## Other bulletins for the same vehicles and component - [N252528020](/bulletins/11025604.md), 2025-11-18, Service campaign: STEERING. Certain vehicles may have a condition in which the Upper Intermediate Steering Shaft Bolt is below torque specification. Dealers will torque the Upper Intermediate Steering Shaft Bolt to specification. - [23\-NA\-201](/bulletins/11024378.md), 2025-10-21, Service bulletin: SERVICE BRAKES; ELECTRICAL SYSTEM; STEERING. This service bulletin advises the technician of a possible loose ground that may be causing customer concerns of Loss of Steering Assist and/or Loss of Brake Assist and Malfunction Indicator Lamp \(MIL\) Illuminated. - [25\-NA\-116](/bulletins/11022874.md), 2025-09-06, Service bulletin: STEERING; ELECTRICAL SYSTEM. This service bulletin provides information and the condition correction on the "Service Steering Column Lock" message and/or those who are unable to move the steering wheel after starting the vehicle. - [N252512260](/bulletins/11020720.md), 2025-07-17, Service campaign: STEERING. Certain vehicles listed above may have a condition in which the fastener for the intermediate steering shaft to steering gear assembly may have suspect torque results. Dealers will replace and torque fastener. - [25\-NA\-096](/bulletins/11019718.md), 2025-06-25, Service bulletin: STEERING; ELECTRICAL SYSTEM. This technical service bulletin provides information on the correction of the Steering Column Lock with the "Service Steering Column Lock" message or the inability to move the steering wheel after starting the vehicle. - [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. - [24\-NA\-176](/bulletins/11019459.md), 2025-06-11, Service bulletin: STEERING; ELECTRICAL SYSTEM. This technical bulletin provides repair information to correct a customer concern of Turn Signal Over Cancelling. - [21\-NA\-166](/bulletins/11019325.md), 2025-06-06, Service bulletin: EXTERIOR LIGHTING; STEERING. This informational bulletin provides information on the turn signal stalk not cancelling and/or mis cancelling. - [13\-02\-32\-001H](/bulletins/11017868.md), 2025-05-06, Service bulletin: STEERING. This service bulletin provides a procedure to flush and bleed power steering system to correct a power steering noise or fluid leak concern that is caused during extremely low temperatures. - [23\-NA\-074](/bulletins/11017508.md), 2025-05-02, Service bulletin: ELECTRICAL SYSTEM; SERVICE BRAKES; ENGINE; STEERING. This service bulletin provides a procedure to add deadener to the batter tray bracket to correct customer concerns of a Service Engine Soon \(SES\), Reduced Power, Service Brake, Reduced Steering and/or Stabilitrak Message Illuminated on DIC, multiple DTCs. 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