This technical bulletin provides repair information to correct a customer concern of MIL Illuminated- ECM...
GMC technical service bulletin 21NA128 for 2021 GMC Sierra 1500, 2021 Chevrolet Silverado 2500 and 2021 GMC Sierra 2500 and others.
- Bulletin number
- 21NA128
- Component
- Engine and engine cooling
- Summary
- This technical bulletin provides repair information to correct a customer concern of MIL Illuminated- ECM Update for P026C, P20EE, or P11D5.
Owners of these vehicles have filed 391 complaints in the engine category.
Vehicles covered
- GMC Sierra 1500 2021 2021
- Chevrolet Silverado 2500 2021 2021
- GMC Sierra 2500 2021 2021
- Chevrolet Silverado 3500 2021 2021
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