This informational bulletin advises the technician of possible coolant entering the areas of the engine,...
Chevrolet technical service bulletin 20NA166 for 2014, 2017-2022 Chevrolet Silverado 1500, 2015-2022 Chevrolet Tahoe and 2014, 2019-2022 GMC Sierra 1500 and others.
- Bulletin number
- 20NA166
- Component
- Engine and engine cooling: cooling system: hoses/lines/piping/fittings
- Summary
- This informational 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.
Owners of these vehicles have filed 5,497 complaints in the engine category.
Vehicles covered
- Chevrolet Silverado 1500 2014, 2017-2022 2014201720182019202020212022
- Chevrolet Tahoe 2015-2022 20152016201720182019202020212022
- GMC Sierra 1500 2014, 2019-2022 20142019202020212022
- Chevrolet Suburban 2015-2022 20152016201720182019202020212022
- Chevrolet Corvette 2016-2019 2016201720182019
- GMC Yukon 2015-2022 20152016201720182019202020212022
- Chevrolet Silverado 2500 2015-2019 20152016201720182019
- Chevrolet Camaro 2016-2022 2016201720182019202020212022
- GMC Yukon XL 2015-2022 20152016201720182019202020212022
- Cadillac CTS 2016-2019 2016201720182019
- GMC Sierra 2500 2015-2018 2015201620172018
- Cadillac Escalade 2015-2020, 2022 2015201620172018201920202022
- Cadillac Escalade ESV 2015-2022 20152016201720182019202020212022
- GMC Sierra Denali 2015-2019 20152016201720182019
- Cadillac Escalade Na 2021 2021
- Chevrolet Silverado 4500 2019 2019
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