NHTSA ID Number: 10219391
Manufacturer Communication Number: 21-NA-181
Summary
This service bulletin provides 9th gear operation information to respond to customers that may comment on transmission shift operation.
Condition
Some customers may comment that the transmission doesn’t shift into 9th gear or
maintain 9th gear operation to customer expectations.
Information
The GM 9-speed transmission does use all 9 gears when most efficient to do so. The vehicle’s control system senses the operating conditions and chooses the correct gear to deliver optimum performance and fuel economy. The control calibration is also tailored for each vehicle application and engine type. On the highway for example, optimal fuel economy may actually be achieved in 8th gear rather than 9th gear depending on a number of factors including vehicle speed, engine load, and throttle input. 9th gear is engaged when appropriate.
Note: Replacing transmission components or complete assemblies will not change the condition. To ensure 9th gear is operating, verify 9th gear is not being commanded on a test drive. Then with GDS2, manually command 9th gear. If achieved, the vehicle system is operating correctly.
32 Affected Products
Vehicles
| MAKE | MODEL | YEAR |
| BUICK | ENCORE GX | 2020-2022 |
| BUICK | ENVISION | 2021-2022 |
| CADILLAC | XT4 | 2019-2022 |
| CADILLAC | XT5 | 2020-2023 |
| CADILLAC | XT6 | 2020-2023 |
| CHEVROLET | BLAZER | 2020-2023 |
| CHEVROLET | TRAILBLAZER | 2021-2022 |
| GMC | ACADIA | 2020-2023 |
| GMC | TERRAIN | 2018-2022 |
1 Associated Document
Manufacturer Communications
Bulletin No.: 21-NA-181
Date: September, 2022
https://www.nhtsa.gov/recalls?nhtsaId=10219391
MC-10219391-0001
- Helps enhance transmission cooling function
- Designed to protect metal surfaces from wea
- Formulated to condition gaskets
- Some ACDelco GM Original Equipment parts may have formerly appeared as GM Genuine Parts (OE) or ACDelco Professional
- ACDelco GM Original Equipment parts are designed, engineered and tested to rigorous standards, and are backed by General Motors.
- Formulated with premium synthetic base oils to achieve low viscosity and minimize deposits
- Provides excellent thermal and oxidation performance
- Durable friction modifiers help prevent shudder
- Advanced anti-wear technology to better prevent gear wear
- SUPERIOR PERFORMANCE: Cuisinart’s 5-1 griddler is a contact grill, panini press, full grill, full griddle and half grill/half griddle
- EASY TO USE: The griddler plates (11-inch x 9-inch) are removable, reversible and are dishwasher safe nonstick cooking plates, the plates also act as a drain for the grease for cooking more healthy. The integrated drip tray collects grease and is easy to store
- ALSO INCLUDED: Red/green indicator lights for easy operation, dishwasher-safe scraping tool for easy clean up and an instruction manual with gourmet recipes for you to enjoy
- CUSTOM CONTROL: Sturdy panini-style handle with hinged floating cover adjusts to thickness of food, selector knob choose grill or griddle function and the adjustable temperature controls for grill or griddle
- LIMITED 3-YEAR WARRANTY: Refer to user manual for troubleshooting steps and questions surrounding warranty policies – this product is BPA free
- Anti-wear protection for clutches, gears and pumps
- Smoother and quieter shifting
- Rust and corrosion protection
- Proper friction control for long life performance and smooth lock ups
- WIDEST SPECIFICATION RANGE - Compatible with FORD XL-12 Case Fluid, BMW LT 71141, Allison TES 295, TES 389, MERCON V, Dexron VI, JEEP ATF 3, ATF 4, HONDA DW1, KIA SP-III/ IV, Mazda ATF MIII/ MV, Nissan Matic D/J/K/S/W - See complete spec pictures of spec sheet.
- FILL FOR LIFE in passenger cars, SUVs and light duty trucks. High shear and thermal stability make this fluid extremely long lasting. When used in non heavy duty service, it should not need to be changed for at least 150,000 miles.
- HEAVY DUTY DURABILITY – high load carrying capacity, high film strength and transmission protection, make this product ideal for heavy duty applications such as diesel trucks, towing, hauling and general high torque applications
- OEM GRADE – Meets or exceeds the specification and performance requirements when compared with OEM fluids from most manufacturers.
- KEY PERFORMANCE METRICS – Highly efficient torque transfer | Lower transmission operating temperature | Superb protection for key transmission parts | Excellent seal maintenance | Smooth rapid and precise shifting without slipping.
- Material code - 98KH08
- Helps improve and extend transmission efficiency, smooth shifting performance and fuel economy
- Keeps transmissions clean to extend life and performance even under some of the harshest driving conditions
- Significant wear reduction and long transmission life
- Provides prompt and reliable lubrication at sub-zero ambient temperatures down to -54 degrees Celsius
- Not for use in applications where MERCON V, MERCON SP, Continuously Variable Chain Type Transmission Fluid, Motorcraft Premium Automatic Transmission Fluid, FNR5 Automatic Transmission Fluid or Type F Automatic Transmission Fluid is recommended
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Copyright 2022 General Motors LLC. All Rights Reserved. Service Bulletin Bulletin No.: 21-NA-181 Date: September, 2022 INFORMATION Subject: Information on 9TH Gear Operation Brand: Model: Model Year: VIN: Engine: Transmission: (9-Speed from to from to Automatic) Buick Encore GX 2020 2023 — — L3T M3F Envision 2021 LSY M3G, M3H Cadillac XT4 2019 LSY M3H XT5 2020 LSY M3G XT6 Chevrolet Blazer 2020 LSY M3T Trailblazer 2021 L3T M3F GMC Acadia 2020 LSY M3G Terrain 2018 LYX M3U Involved Region or Country North America, Europe, Middle East, Israel, Cadillac Korea (South Korea), China Condition Some customers may comment that the transmission doesn’t shift into 9th gear or maintain 9th gear operation to customer expectations. Information The GM 9-speed transmission does use all 9 gears when most efficient to do so. The vehicle’s control system senses the operating conditions and chooses the correct gear to deliver optimum performance and fuel economy. The control calibration is also tailored for each vehicle application and engine type. On the highway for example, optimal fuel economy may actually be achieved in 8th gear rather than 9th gear depending on a number of factors including vehicle speed, engine load, and throttle input. 9th gear is engaged when appropriate. Note: Replacing transmission components or complete assemblies will not change the condition. To ensure 9th gear is operating, verify 9th gear is not being commanded on a test drive. Then with GDS2, manually command 9th gear. If achieved, the vehicle system is operating correctly. Parts Information No parts are required for this repair. Warranty Information For vehicles repaired under the Powertrain coverage, use the following labor operation. Reference the Applicable Warranties section of Investigate Vehicle History (IVH) for coverage information. Labor Operation Description Labor Time 8486038* Confirm 9TH Gear Operation 0.3 hr *This is a unique Labor Operation for bulletin use only. Page 2 September, 2022 Bulletin No.: 21-NA-181 Version 4 Modified Released August 12, 2021 Revised December 21, 2021 – Added RPO M3H to Envision. Revised April 08, 2022 – Add 2022 Model Year to Terrain. Revised August 29, 2022 – Add 2023 Model Year. GM bulletins are intended for use by professional technicians, NOT a “do-it-yourselfer”. They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information. WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION
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