TSB: BUICK CRUZE, ENCORE, ENCORE GX, ENVISTA, SONIC, SPARK, TRAILBLAZER, TRAX (2011–2024)

Bulletin 20-NA-024 — January 30, 2024

Bulletin Details

Bulletin ID20-NA-024
ManufacturerBUICK
ModelsCRUZE, ENCORE, ENCORE GX, ENVISTA, SONIC, SPARK, TRAILBLAZER, TRAX
Model Years2011–2024
Date IssuedJanuary 30, 2024
Date Added to NHTSAFebruary 13, 2024
ComponentENGINE AND ENGINE COOLING
Vehicles Affected118 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 information and diagnostic steps/tips for vehicles that are slow to heat up in cold temperatures.

Affected Vehicles

MakeModelYearComponent
BUICK ENCORE GX 2024 060000 ENGINE AND ENGINE COOLING
BUICK ENCORE GX 2024 350000 EQUIPMENT
BUICK ENVISTA 2024 060000 ENGINE AND ENGINE COOLING
BUICK ENVISTA 2024 350000 EQUIPMENT
CHEVROLET TRAILBLAZER 2024 060000 ENGINE AND ENGINE COOLING
CHEVROLET TRAILBLAZER 2024 350000 EQUIPMENT
CHEVROLET TRAX 2024 060000 ENGINE AND ENGINE COOLING
CHEVROLET TRAX 2024 350000 EQUIPMENT
BUICK ENCORE GX 2023 060000 ENGINE AND ENGINE COOLING
BUICK ENCORE GX 2023 350000 EQUIPMENT
CHEVROLET TRAILBLAZER 2023 060000 ENGINE AND ENGINE COOLING
CHEVROLET TRAILBLAZER 2023 350000 EQUIPMENT
CHEVROLET TRAX 2023 060000 ENGINE AND ENGINE COOLING
CHEVROLET TRAX 2023 350000 EQUIPMENT
BUICK ENCORE 2022 060000 ENGINE AND ENGINE COOLING
BUICK ENCORE 2022 350000 EQUIPMENT
BUICK ENCORE GX 2022 060000 ENGINE AND ENGINE COOLING
BUICK ENCORE GX 2022 350000 EQUIPMENT
CHEVROLET TRAILBLAZER 2022 060000 ENGINE AND ENGINE COOLING
CHEVROLET TRAILBLAZER 2022 350000 EQUIPMENT
CHEVROLET TRAX 2022 060000 ENGINE AND ENGINE COOLING
CHEVROLET TRAX 2022 350000 EQUIPMENT
BUICK ENCORE 2021 060000 ENGINE AND ENGINE COOLING
BUICK ENCORE 2021 350000 EQUIPMENT
BUICK ENCORE GX 2021 060000 ENGINE AND ENGINE COOLING
BUICK ENCORE GX 2021 350000 EQUIPMENT
CHEVROLET TRAILBLAZER 2021 060000 ENGINE AND ENGINE COOLING
CHEVROLET TRAILBLAZER 2021 350000 EQUIPMENT
CHEVROLET TRAX 2021 060000 ENGINE AND ENGINE COOLING
CHEVROLET TRAX 2021 350000 EQUIPMENT
BUICK ENCORE 2020 060000 ENGINE AND ENGINE COOLING
BUICK ENCORE 2020 350000 EQUIPMENT
BUICK ENCORE GX 2020 060000 ENGINE AND ENGINE COOLING
BUICK ENCORE GX 2020 350000 EQUIPMENT
CHEVROLET SONIC 2020 060000 ENGINE AND ENGINE COOLING
CHEVROLET SONIC 2020 350000 EQUIPMENT
CHEVROLET SPARK 2020 060000 ENGINE AND ENGINE COOLING
CHEVROLET SPARK 2020 350000 EQUIPMENT
CHEVROLET TRAX 2020 060000 ENGINE AND ENGINE COOLING
CHEVROLET TRAX 2020 350000 EQUIPMENT
CHEVROLET CRUZE 2019 060000 ENGINE AND ENGINE COOLING
CHEVROLET CRUZE 2019 350000 EQUIPMENT
BUICK ENCORE 2019 060000 ENGINE AND ENGINE COOLING
BUICK ENCORE 2019 350000 EQUIPMENT
CHEVROLET SONIC 2019 060000 ENGINE AND ENGINE COOLING
CHEVROLET SONIC 2019 350000 EQUIPMENT
CHEVROLET SPARK 2019 060000 ENGINE AND ENGINE COOLING
CHEVROLET SPARK 2019 350000 EQUIPMENT
CHEVROLET TRAX 2019 060000 ENGINE AND ENGINE COOLING
CHEVROLET TRAX 2019 350000 EQUIPMENT
CHEVROLET CRUZE 2018 060000 ENGINE AND ENGINE COOLING
CHEVROLET CRUZE 2018 350000 EQUIPMENT
BUICK ENCORE 2018 060000 ENGINE AND ENGINE COOLING
BUICK ENCORE 2018 350000 EQUIPMENT
CHEVROLET SONIC 2018 060000 ENGINE AND ENGINE COOLING
CHEVROLET SONIC 2018 350000 EQUIPMENT
CHEVROLET SPARK 2018 060000 ENGINE AND ENGINE COOLING
CHEVROLET SPARK 2018 350000 EQUIPMENT
CHEVROLET TRAX 2018 060000 ENGINE AND ENGINE COOLING
CHEVROLET TRAX 2018 350000 EQUIPMENT
CHEVROLET CRUZE 2017 060000 ENGINE AND ENGINE COOLING
CHEVROLET CRUZE 2017 350000 EQUIPMENT
BUICK ENCORE 2017 060000 ENGINE AND ENGINE COOLING
BUICK ENCORE 2017 350000 EQUIPMENT
CHEVROLET SONIC 2017 060000 ENGINE AND ENGINE COOLING
CHEVROLET SONIC 2017 350000 EQUIPMENT
CHEVROLET SPARK 2017 060000 ENGINE AND ENGINE COOLING
CHEVROLET SPARK 2017 350000 EQUIPMENT
CHEVROLET TRAX 2017 060000 ENGINE AND ENGINE COOLING
CHEVROLET TRAX 2017 350000 EQUIPMENT
CHEVROLET CRUZE 2016 060000 ENGINE AND ENGINE COOLING
CHEVROLET CRUZE 2016 350000 EQUIPMENT
BUICK ENCORE 2016 060000 ENGINE AND ENGINE COOLING
BUICK ENCORE 2016 350000 EQUIPMENT
CHEVROLET SONIC 2016 060000 ENGINE AND ENGINE COOLING
CHEVROLET SONIC 2016 350000 EQUIPMENT
CHEVROLET SPARK 2016 060000 ENGINE AND ENGINE COOLING
CHEVROLET SPARK 2016 350000 EQUIPMENT
CHEVROLET TRAX 2016 060000 ENGINE AND ENGINE COOLING
CHEVROLET TRAX 2016 350000 EQUIPMENT
CHEVROLET CRUZE 2015 060000 ENGINE AND ENGINE COOLING
CHEVROLET CRUZE 2015 350000 EQUIPMENT
BUICK ENCORE 2015 060000 ENGINE AND ENGINE COOLING
BUICK ENCORE 2015 350000 EQUIPMENT
CHEVROLET SONIC 2015 060000 ENGINE AND ENGINE COOLING
CHEVROLET SONIC 2015 350000 EQUIPMENT
CHEVROLET SPARK 2015 060000 ENGINE AND ENGINE COOLING
CHEVROLET SPARK 2015 350000 EQUIPMENT
CHEVROLET TRAX 2015 060000 ENGINE AND ENGINE COOLING
CHEVROLET TRAX 2015 350000 EQUIPMENT
CHEVROLET CRUZE 2014 060000 ENGINE AND ENGINE COOLING
CHEVROLET CRUZE 2014 350000 EQUIPMENT
BUICK ENCORE 2014 060000 ENGINE AND ENGINE COOLING
BUICK ENCORE 2014 350000 EQUIPMENT
CHEVROLET SONIC 2014 060000 ENGINE AND ENGINE COOLING
CHEVROLET SONIC 2014 350000 EQUIPMENT
CHEVROLET SPARK 2014 060000 ENGINE AND ENGINE COOLING
CHEVROLET SPARK 2014 350000 EQUIPMENT
CHEVROLET TRAX 2014 060000 ENGINE AND ENGINE COOLING
CHEVROLET TRAX 2014 350000 EQUIPMENT
CHEVROLET CRUZE 2013 060000 ENGINE AND ENGINE COOLING
CHEVROLET CRUZE 2013 350000 EQUIPMENT
BUICK ENCORE 2013 060000 ENGINE AND ENGINE COOLING
BUICK ENCORE 2013 350000 EQUIPMENT
CHEVROLET SONIC 2013 060000 ENGINE AND ENGINE COOLING
CHEVROLET SONIC 2013 350000 EQUIPMENT
CHEVROLET SPARK 2013 060000 ENGINE AND ENGINE COOLING
CHEVROLET SPARK 2013 350000 EQUIPMENT
CHEVROLET TRAX 2013 060000 ENGINE AND ENGINE COOLING
CHEVROLET TRAX 2013 350000 EQUIPMENT
CHEVROLET CRUZE 2012 060000 ENGINE AND ENGINE COOLING
CHEVROLET CRUZE 2012 350000 EQUIPMENT
CHEVROLET SONIC 2012 060000 ENGINE AND ENGINE COOLING
CHEVROLET SONIC 2012 350000 EQUIPMENT
CHEVROLET CRUZE 2011 060000 ENGINE AND ENGINE COOLING
CHEVROLET CRUZE 2011 350000 EQUIPMENT

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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 (20-NA-024) 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.