Cadillac Ats 2018–2023 — technical service bulletin

Bulletin 20-NA-187 · NHTSA communication 10230609 · issued Jan 12, 2023

Technical service bulletin

communication type

Power Train

component

2018–2023

model years

vehicle entries

Official 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.

Vehicles covered

2018 Cadillac Ats
2019 Cadillac Ats
2018 Cadillac Ats-V
2021 Cadillac CT4
2022 Cadillac CT4
2023 Cadillac CT4
2018 Cadillac CT6
2019 Cadillac CT6
2018 Cadillac CTS
2019 Cadillac CTS
2018 Cadillac CTS-V
2018 Chevrolet Camaro
2019 Chevrolet Camaro
2020 Chevrolet Camaro
2021 Chevrolet Camaro
2022 Chevrolet Camaro
2023 Chevrolet Camaro
2018 Chevrolet Colorado
2019 Chevrolet Colorado
2020 Chevrolet Colorado
2021 Chevrolet Colorado
2022 Chevrolet Colorado
2018 Chevrolet Corvette
2019 Chevrolet Corvette
2018 Chevrolet Express
2019 Chevrolet Express
2020 Chevrolet Express
2021 Chevrolet Express
2022 Chevrolet Express
2023 Chevrolet Express 2500
2023 Chevrolet Express 3500
2018 Chevrolet Silverado 1500
2019 Chevrolet Silverado 1500
2020 Chevrolet Silverado 1500
2021 Chevrolet Silverado 1500
2022 Chevrolet Silverado 1500
2023 Chevrolet Silverado 1500
2018 GMC Canyon
2019 GMC Canyon
2020 GMC Canyon
2021 GMC Canyon
2022 GMC Canyon
2018 GMC Savana
2019 GMC Savana
2020 GMC Savana
2021 GMC Savana
2022 GMC Savana
2023 GMC Savana
2018 GMC Savana 2500
2018 GMC Savana 3500
2018 GMC Sierra 1500
2019 GMC Sierra 1500
2020 GMC Sierra 1500
2021 GMC Sierra 1500
2022 GMC Sierra 1500
2023 GMC Sierra 1500

What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.