This informational bulletin explains how to identify possible DEF contamination.
Chevrolet technical service bulletin 19NA237 for 2010-2022 Chevrolet Silverado 1500, 2018-2019 Chevrolet Equinox and 2010-2022 GMC Sierra 1500 and others.
- Bulletin number
- 19NA237
- Component
- Engine and engine cooling: exhaust system
- Summary
- This informational bulletin explains how to identify possible DEF contamination.
Owners of these vehicles have filed 5,346 complaints in the engine category.
Vehicles covered
- Chevrolet Silverado 1500 2010-2022 20152016201720182019202020212022
- Chevrolet Equinox 2018-2019 20182019
- GMC Sierra 1500 2010-2022 20152016201720182019202020212022
- Chevrolet Silverado 2500 2010-2022 20152016201720182019202020212022
- Chevrolet Cruze 2014-2019 201420152016201720182019
- Chevrolet Colorado 2016-2021 201620172018201920202021
- GMC Terrain 2018-2020 201820192020
- GMC Sierra 2500 2010-2022 20152016201720182019202020212022
- GMC Canyon 2016-2021 201620172018201920202021
- Chevrolet Silverado 3500 2010-2022 20152016201720182019202020212022
- Chevrolet Express 2010-2018, 2020-2021 20132014201520162017201820202021
- GMC Sierra 3500 2010-2021 20142015201620172018201920202021
- GMC Savana 2010-2018, 2020-2021 20132014201520162017201820202021
- GMC Sierra Denali 2010-2013, 2015-2019 20112012201320152016201720182019
- Chevrolet Silverado 5500 2019-2021 201920202021
- Chevrolet Silverado 4500 2019-2022 2019202020212022
- Chevrolet Silverado 6500 2019, 2021-2022 201920212022
- Chevrolet 6500 2019 2019
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