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TSB: BUICK ACADIA, ATS, BLAZER, CT6, CTS, ENCLAVE, ENVISION, ESCALADE, ESCALADE ESV, MALIBU, TRAVERSE, VOLT, XT4, XT5, XT6, XTS (2017–2021)

Bulletin 21NA035 — March 15, 2021

Bulletin Details

Bulletin ID21NA035
ManufacturerBUICK
ModelsACADIA, ATS, BLAZER, CT6, CTS, ENCLAVE, ENVISION, ESCALADE, ESCALADE ESV, MALIBU, TRAVERSE, VOLT, XT4, XT5, XT6, XTS
Model Years2017–2021
Date IssuedMarch 15, 2021
Date Added to NHTSAMay 3, 2021
ComponentEQUIPMENT ADAPTIVE/MOBILITY:VEHICLE CONTROLS:SPEED CONTROL
Vehicles Affected35 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 information for dealers/technicians on Vehicles that Will Not Hold Set Cruise Control Speed in Enhanced Cruise Control Mode.

Affected Vehicles

MakeModelYearComponent
GMC ACADIA 2021 356210 EQUIPMENT ADAPTIVE/MOBILITY:VEHICLE CONTROLS:SPEED CONTROL
CHEVROLET BLAZER 2021 356210 EQUIPMENT ADAPTIVE/MOBILITY:VEHICLE CONTROLS:SPEED CONTROL
BUICK ENCLAVE 2021 356210 EQUIPMENT ADAPTIVE/MOBILITY:VEHICLE CONTROLS:SPEED CONTROL
CHEVROLET MALIBU 2021 356210 EQUIPMENT ADAPTIVE/MOBILITY:VEHICLE CONTROLS:SPEED CONTROL
GMC ACADIA 2020 356210 EQUIPMENT ADAPTIVE/MOBILITY:VEHICLE CONTROLS:SPEED CONTROL
CHEVROLET BLAZER 2020 356210 EQUIPMENT ADAPTIVE/MOBILITY:VEHICLE CONTROLS:SPEED CONTROL
CADILLAC CT6 2020 356210 EQUIPMENT ADAPTIVE/MOBILITY:VEHICLE CONTROLS:SPEED CONTROL
BUICK ENCLAVE 2020 356210 EQUIPMENT ADAPTIVE/MOBILITY:VEHICLE CONTROLS:SPEED CONTROL
CADILLAC XT4 2020 356210 EQUIPMENT ADAPTIVE/MOBILITY:VEHICLE CONTROLS:SPEED CONTROL
CADILLAC XT5 2020 356210 EQUIPMENT ADAPTIVE/MOBILITY:VEHICLE CONTROLS:SPEED CONTROL
CADILLAC XT6 2020 356210 EQUIPMENT ADAPTIVE/MOBILITY:VEHICLE CONTROLS:SPEED CONTROL
GMC ACADIA 2019 356210 EQUIPMENT ADAPTIVE/MOBILITY:VEHICLE CONTROLS:SPEED CONTROL
CADILLAC ATS 2019 356210 EQUIPMENT ADAPTIVE/MOBILITY:VEHICLE CONTROLS:SPEED CONTROL
CHEVROLET BLAZER 2019 356210 EQUIPMENT ADAPTIVE/MOBILITY:VEHICLE CONTROLS:SPEED CONTROL
CADILLAC CT6 2019 356210 EQUIPMENT ADAPTIVE/MOBILITY:VEHICLE CONTROLS:SPEED CONTROL
BUICK ENCLAVE 2019 356210 EQUIPMENT ADAPTIVE/MOBILITY:VEHICLE CONTROLS:SPEED CONTROL
BUICK ENVISION 2019 356210 EQUIPMENT ADAPTIVE/MOBILITY:VEHICLE CONTROLS:SPEED CONTROL
CADILLAC ESCALADE 2019 356210 EQUIPMENT ADAPTIVE/MOBILITY:VEHICLE CONTROLS:SPEED CONTROL
CADILLAC ESCALADE ESV 2019 356210 EQUIPMENT ADAPTIVE/MOBILITY:VEHICLE CONTROLS:SPEED CONTROL
CHEVROLET MALIBU 2019 356210 EQUIPMENT ADAPTIVE/MOBILITY:VEHICLE CONTROLS:SPEED CONTROL
CHEVROLET TRAVERSE 2019 356210 EQUIPMENT ADAPTIVE/MOBILITY:VEHICLE CONTROLS:SPEED CONTROL
CHEVROLET VOLT 2019 356210 EQUIPMENT ADAPTIVE/MOBILITY:VEHICLE CONTROLS:SPEED CONTROL
CADILLAC XT4 2019 356210 EQUIPMENT ADAPTIVE/MOBILITY:VEHICLE CONTROLS:SPEED CONTROL
CADILLAC XT5 2019 356210 EQUIPMENT ADAPTIVE/MOBILITY:VEHICLE CONTROLS:SPEED CONTROL
GMC ACADIA 2018 356210 EQUIPMENT ADAPTIVE/MOBILITY:VEHICLE CONTROLS:SPEED CONTROL
CADILLAC ATS 2018 356210 EQUIPMENT ADAPTIVE/MOBILITY:VEHICLE CONTROLS:SPEED CONTROL
CADILLAC CT6 2018 356210 EQUIPMENT ADAPTIVE/MOBILITY:VEHICLE CONTROLS:SPEED CONTROL
CADILLAC CTS 2018 356210 EQUIPMENT ADAPTIVE/MOBILITY:VEHICLE CONTROLS:SPEED CONTROL
BUICK ENCLAVE 2018 356210 EQUIPMENT ADAPTIVE/MOBILITY:VEHICLE CONTROLS:SPEED CONTROL
CADILLAC ESCALADE 2018 356210 EQUIPMENT ADAPTIVE/MOBILITY:VEHICLE CONTROLS:SPEED CONTROL
CADILLAC ESCALADE ESV 2018 356210 EQUIPMENT ADAPTIVE/MOBILITY:VEHICLE CONTROLS:SPEED CONTROL
CHEVROLET TRAVERSE 2018 356210 EQUIPMENT ADAPTIVE/MOBILITY:VEHICLE CONTROLS:SPEED CONTROL
CADILLAC XT5 2018 356210 EQUIPMENT ADAPTIVE/MOBILITY:VEHICLE CONTROLS:SPEED CONTROL
CADILLAC XTS 2018 356210 EQUIPMENT ADAPTIVE/MOBILITY:VEHICLE CONTROLS:SPEED CONTROL
CADILLAC CTS 2017 356210 EQUIPMENT ADAPTIVE/MOBILITY:VEHICLE CONTROLS:SPEED CONTROL

Related BUICK Recalls

CampaignModelYearComponentSummary
REGAL 2013 SUSPENSION:REAR General Motors, LLC (GM) is recalling certain 2012–2013 Buick Regal Turbo and...
REGAL 2012 SUSPENSION:REAR General Motors, LLC (GM) is recalling certain 2012–2013 Buick Regal Turbo and...
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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 (21NA035) 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.

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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.

Back to All TSBs