This technical bulletin provides repair information to correct a customer concern of Clean Exhaust Filter,...
Chevrolet technical service bulletin 21NA012 for 2020-2021 Chevrolet Silverado 2500 and 2020-2021 GMC Sierra 2500.
- Bulletin number
- 21NA012
- Component
- Equipment
- Summary
- This technical bulletin provides repair information to correct a customer concern of Clean Exhaust Filter, Perform Manual Regen, and Loss of Digital Speedometer DIC Displays.
Vehicles covered
- Chevrolet Silverado 2500 2020-2021 20202021
- GMC Sierra 2500 2020-2021 20202021
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