TSB: BUICK 3500, 4500HD, 5500HD, ACADIA, ATS, AVEO, BOLT EV, CAMARO, CANYON, CAPRICE, CAPTIVA, CASCADA, CHEYENNE, CITY EXPRESS, COLORADO, CORVETTE, CRUZE, CT6, CTS, ELR, ENCLAVE, ENCORE, ENVISION, EQUINOX, ESCALADE, ESCALADE ESV, EXPRESS, IMPALA, LACROSSE, MALIBU, N300, N300 MAX, ORLANDO, REGAL, S10, SAVANA, SIERRA 2500, SIERRA DENALI, SILVERADO 1500, SILVERADO 2500, SILVERADO 3500, SONIC, SPARK, SPARK EV, SRX, SS, SUBURBAN, TAHOE, TERRAIN, TRAILBLAZER, TRAVERSE, TRAX, VERANO, VOLT, XT5, XTS, YUKON, YUKON XL (2015–2018)

Bulletin PIP5621B — May 27, 2021

Bulletin Details

Bulletin IDPIP5621B
ManufacturerBUICK
Models3500, 4500HD, 5500HD, ACADIA, ATS, AVEO, BOLT EV, CAMARO, CANYON, CAPRICE, CAPTIVA, CASCADA, CHEYENNE, CITY EXPRESS, COLORADO, CORVETTE, CRUZE, CT6, CTS, ELR, ENCLAVE, ENCORE, ENVISION, EQUINOX, ESCALADE, ESCALADE ESV, EXPRESS, IMPALA, LACROSSE, MALIBU, N300, N300 MAX, ORLANDO, REGAL, S10, SAVANA, SIERRA 2500, SIERRA DENALI, SILVERADO 1500, SILVERADO 2500, SILVERADO 3500, SONIC, SPARK, SPARK EV, SRX, SS, SUBURBAN, TAHOE, TERRAIN, TRAILBLAZER, TRAVERSE, TRAX, VERANO, VOLT, XT5, XTS, YUKON, YUKON XL
Model Years2015–2018
Date IssuedMay 27, 2021
Date Added to NHTSAJune 14, 2021
ComponentPOWER TRAIN
Vehicles Affected192 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 Preliminary information communicates to the dealer technician that TAC recommends the utilization of the GDS2 software to aid in diagnosing automatic transmission concerns. TAC is requesting the GDS2 session logs be sent in before the

Affected Vehicles

MakeModelYearComponent
CHEVROLET 4500HD 2018 100000 POWER TRAIN
CHEVROLET 5500HD 2018 100000 POWER TRAIN
GMC ACADIA 2018 100000 POWER TRAIN
CADILLAC ATS 2018 100000 POWER TRAIN
CHEVROLET AVEO 2018 100000 POWER TRAIN
CHEVROLET BOLT EV 2018 100000 POWER TRAIN
CHEVROLET CAMARO 2018 100000 POWER TRAIN
GMC CANYON 2018 100000 POWER TRAIN
CHEVROLET CAPTIVA 2018 100000 POWER TRAIN
BUICK CASCADA 2018 100000 POWER TRAIN
CHEVROLET COLORADO 2018 100000 POWER TRAIN
CHEVROLET CORVETTE 2018 100000 POWER TRAIN
CHEVROLET CRUZE 2018 100000 POWER TRAIN
CADILLAC CT6 2018 100000 POWER TRAIN
CADILLAC CTS 2018 100000 POWER TRAIN
BUICK ENCLAVE 2018 100000 POWER TRAIN
BUICK ENCORE 2018 100000 POWER TRAIN
BUICK ENVISION 2018 100000 POWER TRAIN
CHEVROLET EQUINOX 2018 100000 POWER TRAIN
CADILLAC ESCALADE 2018 100000 POWER TRAIN
CADILLAC ESCALADE ESV 2018 100000 POWER TRAIN
CHEVROLET EXPRESS 2018 100000 POWER TRAIN
CHEVROLET IMPALA 2018 100000 POWER TRAIN
BUICK LACROSSE 2018 100000 POWER TRAIN
CHEVROLET MALIBU 2018 100000 POWER TRAIN
CHEVROLET N300 2018 100000 POWER TRAIN
BUICK REGAL 2018 100000 POWER TRAIN
CHEVROLET S10 2018 100000 POWER TRAIN
GMC SAVANA 2018 100000 POWER TRAIN
GMC SIERRA 2500 2018 100000 POWER TRAIN
GMC SIERRA DENALI 2018 100000 POWER TRAIN
CHEVROLET SILVERADO 1500 2018 100000 POWER TRAIN
CHEVROLET SILVERADO 2500 2018 100000 POWER TRAIN
CHEVROLET SONIC 2018 100000 POWER TRAIN
CHEVROLET SPARK 2018 100000 POWER TRAIN
CHEVROLET SUBURBAN 2018 100000 POWER TRAIN
CHEVROLET TAHOE 2018 100000 POWER TRAIN
GMC TERRAIN 2018 100000 POWER TRAIN
CHEVROLET TRAILBLAZER 2018 100000 POWER TRAIN
CHEVROLET TRAVERSE 2018 100000 POWER TRAIN
CHEVROLET TRAX 2018 100000 POWER TRAIN
CHEVROLET VOLT 2018 100000 POWER TRAIN
CADILLAC XT5 2018 100000 POWER TRAIN
CADILLAC XTS 2018 100000 POWER TRAIN
GMC YUKON 2018 100000 POWER TRAIN
GMC YUKON XL 2018 100000 POWER TRAIN
CHEVROLET 4500HD 2017 100000 POWER TRAIN
CHEVROLET 5500HD 2017 100000 POWER TRAIN
GMC ACADIA 2017 100000 POWER TRAIN
CADILLAC ATS 2017 100000 POWER TRAIN
CHEVROLET AVEO 2017 100000 POWER TRAIN
CHEVROLET BOLT EV 2017 100000 POWER TRAIN
CHEVROLET CAMARO 2017 100000 POWER TRAIN
GMC CANYON 2017 100000 POWER TRAIN
CHEVROLET CAPRICE 2017 100000 POWER TRAIN
CHEVROLET CAPTIVA 2017 100000 POWER TRAIN
BUICK CASCADA 2017 100000 POWER TRAIN
CHEVROLET CHEYENNE 2017 100000 POWER TRAIN
CHEVROLET CITY EXPRESS 2017 100000 POWER TRAIN
CHEVROLET COLORADO 2017 100000 POWER TRAIN
CHEVROLET CORVETTE 2017 100000 POWER TRAIN
CHEVROLET CRUZE 2017 100000 POWER TRAIN
CADILLAC CT6 2017 100000 POWER TRAIN
CADILLAC CTS 2017 100000 POWER TRAIN
CADILLAC ELR 2017 100000 POWER TRAIN
BUICK ENCLAVE 2017 100000 POWER TRAIN
BUICK ENCORE 2017 100000 POWER TRAIN
BUICK ENVISION 2017 100000 POWER TRAIN
CHEVROLET EQUINOX 2017 100000 POWER TRAIN
CADILLAC ESCALADE 2017 100000 POWER TRAIN
CADILLAC ESCALADE ESV 2017 100000 POWER TRAIN
CHEVROLET EXPRESS 2017 100000 POWER TRAIN
CHEVROLET IMPALA 2017 100000 POWER TRAIN
BUICK LACROSSE 2017 100000 POWER TRAIN
CHEVROLET MALIBU 2017 100000 POWER TRAIN
CHEVROLET N300 MAX 2017 100000 POWER TRAIN
CHEVROLET ORLANDO 2017 100000 POWER TRAIN
BUICK REGAL 2017 100000 POWER TRAIN
CHEVROLET S10 2017 100000 POWER TRAIN
GMC SAVANA 2017 100000 POWER TRAIN
GMC SIERRA 2500 2017 100000 POWER TRAIN
GMC SIERRA DENALI 2017 100000 POWER TRAIN
CHEVROLET SILVERADO 1500 2017 100000 POWER TRAIN
CHEVROLET SILVERADO 2500 2017 100000 POWER TRAIN
CHEVROLET SILVERADO 3500 2017 100000 POWER TRAIN
CHEVROLET SONIC 2017 100000 POWER TRAIN
CHEVROLET SPARK 2017 100000 POWER TRAIN
CHEVROLET SPARK EV 2017 100000 POWER TRAIN
CHEVROLET SS 2017 100000 POWER TRAIN
CHEVROLET SUBURBAN 2017 100000 POWER TRAIN
CHEVROLET TAHOE 2017 100000 POWER TRAIN
GMC TERRAIN 2017 100000 POWER TRAIN
CHEVROLET TRAILBLAZER 2017 100000 POWER TRAIN
CHEVROLET TRAVERSE 2017 100000 POWER TRAIN
CHEVROLET TRAX 2017 100000 POWER TRAIN
BUICK VERANO 2017 100000 POWER TRAIN
CHEVROLET VOLT 2017 100000 POWER TRAIN
CADILLAC XT5 2017 100000 POWER TRAIN
CADILLAC XTS 2017 100000 POWER TRAIN
GMC YUKON 2017 100000 POWER TRAIN
GMC YUKON XL 2017 100000 POWER TRAIN
CHEVROLET 3500 2016 100000 POWER TRAIN
GMC ACADIA 2016 100000 POWER TRAIN
CADILLAC ATS 2016 100000 POWER TRAIN
CHEVROLET AVEO 2016 100000 POWER TRAIN
CHEVROLET CAMARO 2016 100000 POWER TRAIN
GMC CANYON 2016 100000 POWER TRAIN
CHEVROLET CAPRICE 2016 100000 POWER TRAIN
CHEVROLET CAPTIVA 2016 100000 POWER TRAIN
BUICK CASCADA 2016 100000 POWER TRAIN
CHEVROLET CITY EXPRESS 2016 100000 POWER TRAIN
CHEVROLET COLORADO 2016 100000 POWER TRAIN
CHEVROLET CORVETTE 2016 100000 POWER TRAIN
CHEVROLET CRUZE 2016 100000 POWER TRAIN
CADILLAC CT6 2016 100000 POWER TRAIN
CADILLAC CTS 2016 100000 POWER TRAIN
CADILLAC ELR 2016 100000 POWER TRAIN
BUICK ENCLAVE 2016 100000 POWER TRAIN
BUICK ENCORE 2016 100000 POWER TRAIN
BUICK ENVISION 2016 100000 POWER TRAIN
CHEVROLET EQUINOX 2016 100000 POWER TRAIN
CADILLAC ESCALADE 2016 100000 POWER TRAIN
CADILLAC ESCALADE ESV 2016 100000 POWER TRAIN
CHEVROLET EXPRESS 2016 100000 POWER TRAIN
CHEVROLET IMPALA 2016 100000 POWER TRAIN
BUICK LACROSSE 2016 100000 POWER TRAIN
CHEVROLET MALIBU 2016 100000 POWER TRAIN
CHEVROLET N300 2016 100000 POWER TRAIN
BUICK REGAL 2016 100000 POWER TRAIN
CHEVROLET S10 2016 100000 POWER TRAIN
GMC SAVANA 2016 100000 POWER TRAIN
GMC SIERRA 2500 2016 100000 POWER TRAIN
GMC SIERRA DENALI 2016 100000 POWER TRAIN
CHEVROLET SILVERADO 2500 2016 100000 POWER TRAIN
CHEVROLET SONIC 2016 100000 POWER TRAIN
CHEVROLET SPARK 2016 100000 POWER TRAIN
CHEVROLET SPARK EV 2016 100000 POWER TRAIN
CADILLAC SRX 2016 100000 POWER TRAIN
CHEVROLET SS 2016 100000 POWER TRAIN
CHEVROLET SUBURBAN 2016 100000 POWER TRAIN
CHEVROLET TAHOE 2016 100000 POWER TRAIN
GMC TERRAIN 2016 100000 POWER TRAIN
CHEVROLET TRAVERSE 2016 100000 POWER TRAIN
CHEVROLET TRAX 2016 100000 POWER TRAIN
BUICK VERANO 2016 100000 POWER TRAIN
CHEVROLET VOLT 2016 100000 POWER TRAIN
CADILLAC XTS 2016 100000 POWER TRAIN
GMC YUKON 2016 100000 POWER TRAIN
GMC YUKON XL 2016 100000 POWER TRAIN
GMC ACADIA 2015 100000 POWER TRAIN
CADILLAC ATS 2015 100000 POWER TRAIN
CHEVROLET AVEO 2015 100000 POWER TRAIN
CHEVROLET CAMARO 2015 100000 POWER TRAIN
GMC CANYON 2015 100000 POWER TRAIN
CHEVROLET CAPRICE 2015 100000 POWER TRAIN
CHEVROLET CAPTIVA 2015 100000 POWER TRAIN
CHEVROLET CITY EXPRESS 2015 100000 POWER TRAIN
CHEVROLET COLORADO 2015 100000 POWER TRAIN
CHEVROLET CORVETTE 2015 100000 POWER TRAIN
CHEVROLET CRUZE 2015 100000 POWER TRAIN
CADILLAC CTS 2015 100000 POWER TRAIN
CADILLAC ELR 2015 100000 POWER TRAIN
BUICK ENCLAVE 2015 100000 POWER TRAIN
BUICK ENCORE 2015 100000 POWER TRAIN
CHEVROLET EQUINOX 2015 100000 POWER TRAIN
CADILLAC ESCALADE 2015 100000 POWER TRAIN
CADILLAC ESCALADE ESV 2015 100000 POWER TRAIN
CHEVROLET EXPRESS 2015 100000 POWER TRAIN
CHEVROLET IMPALA 2015 100000 POWER TRAIN
BUICK LACROSSE 2015 100000 POWER TRAIN
CHEVROLET MALIBU 2015 100000 POWER TRAIN
CHEVROLET N300 2015 100000 POWER TRAIN
BUICK REGAL 2015 100000 POWER TRAIN
GMC SAVANA 2015 100000 POWER TRAIN
GMC SIERRA 2500 2015 100000 POWER TRAIN
GMC SIERRA DENALI 2015 100000 POWER TRAIN
CHEVROLET SILVERADO 2500 2015 100000 POWER TRAIN
CHEVROLET SONIC 2015 100000 POWER TRAIN
CHEVROLET SPARK 2015 100000 POWER TRAIN
CHEVROLET SPARK EV 2015 100000 POWER TRAIN
CADILLAC SRX 2015 100000 POWER TRAIN
CHEVROLET SS 2015 100000 POWER TRAIN
CHEVROLET SUBURBAN 2015 100000 POWER TRAIN
CHEVROLET TAHOE 2015 100000 POWER TRAIN
GMC TERRAIN 2015 100000 POWER TRAIN
CHEVROLET TRAVERSE 2015 100000 POWER TRAIN
CHEVROLET TRAX 2015 100000 POWER TRAIN
BUICK VERANO 2015 100000 POWER TRAIN
CHEVROLET VOLT 2015 100000 POWER TRAIN
CADILLAC XTS 2015 100000 POWER TRAIN
GMC YUKON 2015 100000 POWER TRAIN
GMC YUKON XL 2015 100000 POWER TRAIN

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...
ENCLAVE 2026 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER ... General Motors has decided that certain 2027 Chevrolet Bolt EV, 2025-2026 Cad...
ENVISION 2026 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER ... General Motors has decided that certain 2027 Chevrolet Bolt EV, 2025-2026 Cad...
VERANO 2014 AIR BAGS:SIDE/WINDOW General Motors, LLC (GM) is recalling certain 2014 Buick Verano and Chevrolet...

What Should You Do?

If your vehicle is affected by this TSB, contact your authorized BUICK dealer. Bring this bulletin ID (PIP5621B) 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.