This service bulletin provides diagnostic strategy information to aid in diagnosing a Ticking, Tap or...
Chevrolet technical service bulletin 21NA278 for 2019-2021 Chevrolet Blazer, 2017-2019, 2021-2022 GMC Acadia and 2017-2022 Chevrolet Colorado and others.
- Bulletin number
- 21NA278
- Component
- Electrical system
- Summary
- This service bulletin provides diagnostic strategy information to aid in diagnosing a Ticking, Tap or Rattle Noise from Engine with Possible Misfire, Malfunction Indicator Lamp (MIL) Illuminated.
Owners of these vehicles have filed 1,074 complaints in the electrical category.
Vehicles covered
- Chevrolet Blazer 2019-2021 201920202021
- GMC Acadia 2017-2019, 2021-2022 20172018201920212022
- Chevrolet Colorado 2017-2022 201720182019202020212022
- Buick Regal 2018-2020 201820192020
- Chevrolet Camaro 2016-2022 2016201720182019202020212022
- Cadillac CTS 2016-2019 2016201720182019
- Buick Lacrosse 2017-2019 201720182019
- GMC Canyon 2017-2022 201720182019202020212022
- Cadillac Ats 2016-2019 2016201720182019
- Cadillac XT5 2017-2019, 2021-2022 20172018201920212022
- Cadillac CT5 2020-2022 202020212022
- Cadillac XT6 2020-2022 202020212022
- Cadillac CT6 2016-2020 20162017201820192020
VIN decoder
See the problems and recalls for an exact car
Buying a used Chevrolet Blazer?
Check the exact car before you pay: accidents, salvage or flood titles, odometer readings and previous owners.
Check its history