TSB: BUICK ACADIA, BLAZER, ENCORE GX, ENVISION, EQUINOX, MALIBU, REGAL, TERRAIN, TRAILBLAZER, XT4, XT5, XT6 (2020–2024)

Bulletin 21-NA-169 — April 7, 2022

Bulletin Details

Bulletin ID21-NA-169
ManufacturerBUICK
ModelsACADIA, BLAZER, ENCORE GX, ENVISION, EQUINOX, MALIBU, REGAL, TERRAIN, TRAILBLAZER, XT4, XT5, XT6
Model Years2020–2024
Date IssuedApril 7, 2022
Date Added to NHTSASeptember 5, 2023
ComponentPOWER TRAIN
Vehicles Affected135 combinations

What is a TSB?

A Technical Service Bulletin is a document issued by the vehicle manufacturer to inform dealership technicians about a known issue and the recommended repair procedure. TSBs are not mandatory recalls — they serve as repair guidance for common problems.

If your vehicle has this issue, bring this bulletin ID to your dealer. If under warranty, the repair should be covered at no cost.

Summary

This service bulletin provides diagnostic information/procedures to aid the service technician in diagnosing 9T45/50/60 automatic transmissions with low mileage and DTCs current or history related to the control solenoids and valves.

Affected Vehicles

MakeModelYearComponent
CHEVROLET BLAZER 2024 100000 POWER TRAIN
CHEVROLET BLAZER 2024 103000 POWER TRAIN:AUTOMATIC TRANSMISSION
BUICK ENCORE GX 2024 100000 POWER TRAIN
BUICK ENCORE GX 2024 103000 POWER TRAIN:AUTOMATIC TRANSMISSION
BUICK ENVISION 2024 100000 POWER TRAIN
BUICK ENVISION 2024 103000 POWER TRAIN:AUTOMATIC TRANSMISSION
GMC TERRAIN 2024 100000 POWER TRAIN
GMC TERRAIN 2024 103000 POWER TRAIN:AUTOMATIC TRANSMISSION
CHEVROLET TRAILBLAZER 2024 100000 POWER TRAIN
CHEVROLET TRAILBLAZER 2024 103000 POWER TRAIN:AUTOMATIC TRANSMISSION
CADILLAC XT4 2024 100000 POWER TRAIN
CADILLAC XT4 2024 103000 POWER TRAIN:AUTOMATIC TRANSMISSION
CADILLAC XT5 2024 100000 POWER TRAIN
CADILLAC XT5 2024 103000 POWER TRAIN:AUTOMATIC TRANSMISSION
CADILLAC XT6 2024 100000 POWER TRAIN
CADILLAC XT6 2024 103000 POWER TRAIN:AUTOMATIC TRANSMISSION
GMC ACADIA 2023 100000 POWER TRAIN
GMC ACADIA 2023 100000 POWER TRAIN
GMC ACADIA 2023 103000 POWER TRAIN:AUTOMATIC TRANSMISSION
CHEVROLET BLAZER 2023 100000 POWER TRAIN
CHEVROLET BLAZER 2023 100000 POWER TRAIN
CHEVROLET BLAZER 2023 103000 POWER TRAIN:AUTOMATIC TRANSMISSION
BUICK ENVISION 2023 100000 POWER TRAIN
BUICK ENVISION 2023 103000 POWER TRAIN:AUTOMATIC TRANSMISSION
CHEVROLET MALIBU 2023 100000 POWER TRAIN
CHEVROLET MALIBU 2023 103000 POWER TRAIN:AUTOMATIC TRANSMISSION
GMC TERRAIN 2023 100000 POWER TRAIN
GMC TERRAIN 2023 103000 POWER TRAIN:AUTOMATIC TRANSMISSION
CHEVROLET TRAILBLAZER 2023 100000 POWER TRAIN
CHEVROLET TRAILBLAZER 2023 103000 POWER TRAIN:AUTOMATIC TRANSMISSION
CADILLAC XT4 2023 100000 POWER TRAIN
CADILLAC XT4 2023 103000 POWER TRAIN:AUTOMATIC TRANSMISSION
CADILLAC XT5 2023 100000 POWER TRAIN
CADILLAC XT5 2023 100000 POWER TRAIN
CADILLAC XT5 2023 103000 POWER TRAIN:AUTOMATIC TRANSMISSION
CADILLAC XT6 2023 100000 POWER TRAIN
CADILLAC XT6 2023 100000 POWER TRAIN
CADILLAC XT6 2023 103000 POWER TRAIN:AUTOMATIC TRANSMISSION
GMC ACADIA 2022 100000 POWER TRAIN
GMC ACADIA 2022 100000 POWER TRAIN
GMC ACADIA 2022 100000 POWER TRAIN
GMC ACADIA 2022 103000 POWER TRAIN:AUTOMATIC TRANSMISSION
CHEVROLET BLAZER 2022 100000 POWER TRAIN
CHEVROLET BLAZER 2022 100000 POWER TRAIN
CHEVROLET BLAZER 2022 100000 POWER TRAIN
CHEVROLET BLAZER 2022 103000 POWER TRAIN:AUTOMATIC TRANSMISSION
BUICK ENCORE GX 2022 100000 POWER TRAIN
BUICK ENCORE GX 2022 100000 POWER TRAIN
BUICK ENVISION 2022 100000 POWER TRAIN
BUICK ENVISION 2022 100000 POWER TRAIN
BUICK ENVISION 2022 100000 POWER TRAIN
BUICK ENVISION 2022 103000 POWER TRAIN:AUTOMATIC TRANSMISSION
CHEVROLET MALIBU 2022 100000 POWER TRAIN
CHEVROLET MALIBU 2022 100000 POWER TRAIN
CHEVROLET MALIBU 2022 100000 POWER TRAIN
CHEVROLET MALIBU 2022 103000 POWER TRAIN:AUTOMATIC TRANSMISSION
GMC TERRAIN 2022 100000 POWER TRAIN
GMC TERRAIN 2022 100000 POWER TRAIN
GMC TERRAIN 2022 100000 POWER TRAIN
GMC TERRAIN 2022 103000 POWER TRAIN:AUTOMATIC TRANSMISSION
CHEVROLET TRAILBLAZER 2022 100000 POWER TRAIN
CHEVROLET TRAILBLAZER 2022 100000 POWER TRAIN
CHEVROLET TRAILBLAZER 2022 100000 POWER TRAIN
CHEVROLET TRAILBLAZER 2022 103000 POWER TRAIN:AUTOMATIC TRANSMISSION
CADILLAC XT4 2022 100000 POWER TRAIN
CADILLAC XT4 2022 100000 POWER TRAIN
CADILLAC XT4 2022 100000 POWER TRAIN
CADILLAC XT4 2022 103000 POWER TRAIN:AUTOMATIC TRANSMISSION
CADILLAC XT5 2022 100000 POWER TRAIN
CADILLAC XT5 2022 100000 POWER TRAIN
CADILLAC XT5 2022 100000 POWER TRAIN
CADILLAC XT5 2022 103000 POWER TRAIN:AUTOMATIC TRANSMISSION
CADILLAC XT6 2022 100000 POWER TRAIN
CADILLAC XT6 2022 100000 POWER TRAIN
CADILLAC XT6 2022 100000 POWER TRAIN
CADILLAC XT6 2022 103000 POWER TRAIN:AUTOMATIC TRANSMISSION
GMC ACADIA 2021 100000 POWER TRAIN
GMC ACADIA 2021 100000 POWER TRAIN
GMC ACADIA 2021 100000 POWER TRAIN
GMC ACADIA 2021 103000 POWER TRAIN:AUTOMATIC TRANSMISSION
CHEVROLET BLAZER 2021 100000 POWER TRAIN
CHEVROLET BLAZER 2021 100000 POWER TRAIN
CHEVROLET BLAZER 2021 100000 POWER TRAIN
CHEVROLET BLAZER 2021 103000 POWER TRAIN:AUTOMATIC TRANSMISSION
BUICK ENCORE GX 2021 100000 POWER TRAIN
BUICK ENCORE GX 2021 100000 POWER TRAIN
BUICK ENVISION 2021 100000 POWER TRAIN
BUICK ENVISION 2021 100000 POWER TRAIN
BUICK ENVISION 2021 100000 POWER TRAIN
BUICK ENVISION 2021 103000 POWER TRAIN:AUTOMATIC TRANSMISSION
CHEVROLET MALIBU 2021 100000 POWER TRAIN
CHEVROLET MALIBU 2021 100000 POWER TRAIN
CHEVROLET MALIBU 2021 100000 POWER TRAIN
CHEVROLET MALIBU 2021 103000 POWER TRAIN:AUTOMATIC TRANSMISSION
GMC TERRAIN 2021 100000 POWER TRAIN
GMC TERRAIN 2021 100000 POWER TRAIN
GMC TERRAIN 2021 100000 POWER TRAIN
GMC TERRAIN 2021 103000 POWER TRAIN:AUTOMATIC TRANSMISSION
CHEVROLET TRAILBLAZER 2021 100000 POWER TRAIN
CHEVROLET TRAILBLAZER 2021 100000 POWER TRAIN
CHEVROLET TRAILBLAZER 2021 100000 POWER TRAIN
CHEVROLET TRAILBLAZER 2021 103000 POWER TRAIN:AUTOMATIC TRANSMISSION
CADILLAC XT4 2021 100000 POWER TRAIN
CADILLAC XT4 2021 100000 POWER TRAIN
CADILLAC XT4 2021 100000 POWER TRAIN
CADILLAC XT4 2021 103000 POWER TRAIN:AUTOMATIC TRANSMISSION
CADILLAC XT5 2021 100000 POWER TRAIN
CADILLAC XT5 2021 100000 POWER TRAIN
CADILLAC XT5 2021 100000 POWER TRAIN
CADILLAC XT5 2021 103000 POWER TRAIN:AUTOMATIC TRANSMISSION
CADILLAC XT6 2021 100000 POWER TRAIN
CADILLAC XT6 2021 100000 POWER TRAIN
CADILLAC XT6 2021 100000 POWER TRAIN
CADILLAC XT6 2021 103000 POWER TRAIN:AUTOMATIC TRANSMISSION
GMC ACADIA 2020 100000 POWER TRAIN
CHEVROLET BLAZER 2020 100000 POWER TRAIN
BUICK ENCORE GX 2020 100000 POWER TRAIN
BUICK ENVISION 2020 100000 POWER TRAIN
CHEVROLET EQUINOX 2020 100000 POWER TRAIN
CHEVROLET MALIBU 2020 100000 POWER TRAIN
BUICK REGAL 2020 100000 POWER TRAIN
GMC TERRAIN 2020 100000 POWER TRAIN
CADILLAC XT4 2020 100000 POWER TRAIN
CADILLAC XT5 2020 100000 POWER TRAIN
CADILLAC XT6 2020 100000 POWER TRAIN

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What Should You Do?

If your vehicle is affected by this TSB, contact your authorized BUICK dealer. Bring this bulletin ID (21-NA-169) when you visit. If under warranty, the repair should be free. If your warranty has expired, ask about goodwill coverage — manufacturers sometimes cover TSB-related repairs beyond the warranty period.

Frequently Asked Questions

A recall is a mandatory safety fix — the manufacturer must repair every affected vehicle for free. A TSB is an advisory document that describes a known issue and the recommended fix, but repairs are not required. However, some TSBs eventually lead to recalls if the issue poses a safety risk. TSBs are generally issued for quality or performance problems, while recalls address safety defects.

If your vehicle is still under the manufacturer's warranty, TSB-related repairs are typically covered at no cost. If your warranty has expired, you can ask the dealer about goodwill or customer assistance programs. Many manufacturers will cover or partially cover repairs for well-known issues, especially if the TSB was issued recently or affects a large number of vehicles.

Check the make, model, and model year listed above against your vehicle. If they match, this bulletin likely applies. However, TSBs may only affect vehicles with specific production dates, VIN ranges, or configurations. Your dealer can confirm by entering your VIN into their service system, which will show all applicable TSBs and recalls.

This data comes from the National Highway Traffic Safety Administration (NHTSA). Manufacturers are required to submit copies of all communications (including TSBs) sent to their dealers to NHTSA. The agency makes this data publicly available as part of its vehicle safety monitoring program.