TSB: CADILLAC ATS, ATS-V, CAMARO, CANYON, COLORADO, CORVETTE, CT4, CT6, CTS, CTS-V, EXPRESS, EXPRESS 2500, EXPRESS 3500, SAVANA, SAVANA 2500, SAVANA 3500, SIERRA 1500, SILVERADO 1500 (2018–2023)

Bulletin 20-NA-187 — January 12, 2023

Bulletin Details

Bulletin ID20-NA-187
ManufacturerCADILLAC
ModelsATS, ATS-V, CAMARO, CANYON, COLORADO, CORVETTE, CT4, CT6, CTS, CTS-V, EXPRESS, EXPRESS 2500, EXPRESS 3500, SAVANA, SAVANA 2500, SAVANA 3500, SIERRA 1500, SILVERADO 1500
Model Years2018–2023
Date IssuedJanuary 12, 2023
Date Added to NHTSAJanuary 24, 2023
ComponentPOWER TRAIN
Vehicles Affected56 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 a repair procedure to correct a customer concern of Delayed and/or Harsh Engagement of Transmission Shift After Vehicle Sitting with Engine Off.

Affected Vehicles

MakeModelYearComponent
CHEVROLET CAMARO 2023 100000 POWER TRAIN
CADILLAC CT4 2023 100000 POWER TRAIN
CHEVROLET EXPRESS 2500 2023 100000 POWER TRAIN
CHEVROLET EXPRESS 3500 2023 100000 POWER TRAIN
GMC SAVANA 2023 100000 POWER TRAIN
GMC SIERRA 1500 2023 100000 POWER TRAIN
CHEVROLET SILVERADO 1500 2023 100000 POWER TRAIN
CHEVROLET CAMARO 2022 100000 POWER TRAIN
GMC CANYON 2022 100000 POWER TRAIN
CHEVROLET COLORADO 2022 100000 POWER TRAIN
CADILLAC CT4 2022 100000 POWER TRAIN
CHEVROLET EXPRESS 2022 100000 POWER TRAIN
GMC SAVANA 2022 100000 POWER TRAIN
GMC SIERRA 1500 2022 100000 POWER TRAIN
CHEVROLET SILVERADO 1500 2022 100000 POWER TRAIN
CHEVROLET CAMARO 2021 100000 POWER TRAIN
GMC CANYON 2021 100000 POWER TRAIN
CHEVROLET COLORADO 2021 100000 POWER TRAIN
CADILLAC CT4 2021 100000 POWER TRAIN
CHEVROLET EXPRESS 2021 100000 POWER TRAIN
GMC SAVANA 2021 100000 POWER TRAIN
GMC SIERRA 1500 2021 100000 POWER TRAIN
CHEVROLET SILVERADO 1500 2021 100000 POWER TRAIN
CHEVROLET CAMARO 2020 100000 POWER TRAIN
GMC CANYON 2020 100000 POWER TRAIN
CHEVROLET COLORADO 2020 100000 POWER TRAIN
CHEVROLET EXPRESS 2020 100000 POWER TRAIN
GMC SAVANA 2020 100000 POWER TRAIN
GMC SIERRA 1500 2020 100000 POWER TRAIN
CHEVROLET SILVERADO 1500 2020 100000 POWER TRAIN
CADILLAC ATS 2019 100000 POWER TRAIN
CHEVROLET CAMARO 2019 100000 POWER TRAIN
GMC CANYON 2019 100000 POWER TRAIN
CHEVROLET COLORADO 2019 100000 POWER TRAIN
CHEVROLET CORVETTE 2019 100000 POWER TRAIN
CADILLAC CT6 2019 100000 POWER TRAIN
CADILLAC CTS 2019 100000 POWER TRAIN
CHEVROLET EXPRESS 2019 100000 POWER TRAIN
GMC SAVANA 2019 100000 POWER TRAIN
GMC SIERRA 1500 2019 100000 POWER TRAIN
CHEVROLET SILVERADO 1500 2019 100000 POWER TRAIN
CADILLAC ATS 2018 100000 POWER TRAIN
CADILLAC ATS-V 2018 100000 POWER TRAIN
CHEVROLET CAMARO 2018 100000 POWER TRAIN
GMC CANYON 2018 100000 POWER TRAIN
CHEVROLET COLORADO 2018 100000 POWER TRAIN
CHEVROLET CORVETTE 2018 100000 POWER TRAIN
CADILLAC CT6 2018 100000 POWER TRAIN
CADILLAC CTS 2018 100000 POWER TRAIN
CADILLAC CTS-V 2018 100000 POWER TRAIN
CHEVROLET EXPRESS 2018 100000 POWER TRAIN
GMC SAVANA 2018 100000 POWER TRAIN
GMC SAVANA 2500 2018 100000 POWER TRAIN
GMC SAVANA 3500 2018 100000 POWER TRAIN
GMC SIERRA 1500 2018 100000 POWER TRAIN
CHEVROLET SILVERADO 1500 2018 100000 POWER TRAIN

Related CADILLAC Recalls

CampaignModelYearComponentSummary
CTS 2016 AIR BAGS:FRONTAL:DRIVER SIDE:INFLATOR... General Motors, LLC (GM) is recalling certain 2015 Cadillac Escalade, Escalad...
ATS 2015 AIR BAGS:FRONTAL:DRIVER SIDE:INFLATOR... General Motors, LLC (GM) is recalling certain 2015 Cadillac Escalade, Escalad...
ESCALADE 2015 AIR BAGS:FRONTAL:DRIVER SIDE:INFLATOR... General Motors, LLC (GM) is recalling certain 2015 Cadillac Escalade, Escalad...
SRX 2015 AIR BAGS:FRONTAL:DRIVER SIDE:INFLATOR... General Motors, LLC (GM) is recalling certain 2015 Cadillac Escalade, Escalad...
SRX 2016 AIR BAGS:FRONTAL:DRIVER SIDE:INFLATOR... General Motors, LLC (GM) is recalling certain 2015 Cadillac Escalade, Escalad...

What Should You Do?

If your vehicle is affected by this TSB, contact your authorized CADILLAC dealer. Bring this bulletin ID (20-NA-187) 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.