Cadillac CTS 2014–2024 — technical service bulletin

Bulletin 20-NA-166 · NHTSA communication 10252125 · issued Mar 21, 2024

Technical service bulletin

communication type

Engine and Engine Cooling

component

2014–2024

model years

vehicle entries

Official summary

This service bulletin advises the technician of possible coolant entering the areas of the engine, either through failed parts or defects in the castings, that may be the cause of the concerns related to the MIL or the engine running rough.

Vehicles covered

2016 Cadillac CTS
2017 Cadillac CTS
2018 Cadillac CTS
2019 Cadillac CTS
2015 Cadillac Escalade
2016 Cadillac Escalade
2017 Cadillac Escalade
2018 Cadillac Escalade
2019 Cadillac Escalade
2020 Cadillac Escalade
2021 Cadillac Escalade
2022 Cadillac Escalade
2023 Cadillac Escalade
2024 Cadillac Escalade
2015 Cadillac Escalade Esv
2016 Cadillac Escalade Esv
2017 Cadillac Escalade Esv
2018 Cadillac Escalade Esv
2019 Cadillac Escalade Esv
2020 Cadillac Escalade Esv
2021 Cadillac Escalade Esv
2022 Cadillac Escalade Esv
2023 Cadillac Escalade Esv
2021 Cadillac Escalade NA
2016 Chevrolet Camaro
2017 Chevrolet Camaro
2018 Chevrolet Camaro
2019 Chevrolet Camaro
2020 Chevrolet Camaro
2021 Chevrolet Camaro
2022 Chevrolet Camaro
2023 Chevrolet Camaro
2024 Chevrolet Camaro
2016 Chevrolet Corvette
2017 Chevrolet Corvette
2018 Chevrolet Corvette
2019 Chevrolet Corvette
2014 Chevrolet Silverado 1500
2015 Chevrolet Silverado 1500
2016 Chevrolet Silverado 1500
2017 Chevrolet Silverado 1500
2018 Chevrolet Silverado 1500
2019 Chevrolet Silverado 1500
2020 Chevrolet Silverado 1500
2021 Chevrolet Silverado 1500
2022 Chevrolet Silverado 1500
2023 Chevrolet Silverado 1500
2024 Chevrolet Silverado 1500
2015 Chevrolet Suburban
2016 Chevrolet Suburban
2017 Chevrolet Suburban
2018 Chevrolet Suburban
2019 Chevrolet Suburban
2020 Chevrolet Suburban
2021 Chevrolet Suburban
2022 Chevrolet Suburban
2023 Chevrolet Suburban
2024 Chevrolet Suburban
2021 Chevrolet Suburban 1500
2022 Chevrolet Suburban 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.