This informational bulletin provides a test procedure, for a possible faulty DEF Heater.
Chevrolet technical service bulletin 21NA002 for 2020-2021 Chevrolet Silverado 1500, 2020-2021 GMC Sierra 1500 and 2021 Chevrolet Suburban and others.
- Bulletin number
- 21NA002
- Component
- Engine and engine cooling
- Summary
- This informational bulletin provides a test procedure, for a possible faulty DEF Heater.
Owners of these vehicles have filed 1,956 complaints in the engine category.
Vehicles covered
- Chevrolet Silverado 1500 2020-2021 20202021
- GMC Sierra 1500 2020-2021 20202021
- Chevrolet Suburban 2021 2021
- GMC Yukon 2021 2021
- Chevrolet Silverado 2500 2020-2021 20202021
- GMC Yukon XL 2021 2021
- GMC Sierra 2500 2020-2021 20202021
- Cadillac Escalade ESV 2021 2021
- Cadillac Escalade Na 2021 2021
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