Chevrolet Silverado 3500HD DTC Codes
Select your year and engine to view applicable diagnostic trouble codes. 🇲🇽 Mexico
14 Configurations
2026
6.6L V8 Duramax L5P
821 DTC codes
diesel2026
6.6L V8 L8T Gas
971 DTC codes
2025
6.6L V8 Duramax L5P
821 DTC codes
diesel2025
6.6L V8 L8T Gas
971 DTC codes
2024
6.6L V8 Duramax L5P
821 DTC codes
diesel2024
6.6L V8 L8T Gas
971 DTC codes
2023
6.6L V8 Duramax L5P
821 DTC codes
diesel2023
6.6L V8 L8T Gas
971 DTC codes
2022
6.6L V8 Duramax L5P
821 DTC codes
diesel2022
6.6L V8 L8T Gas
971 DTC codes
2021
6.6L V8 Duramax L5P
821 DTC codes
diesel2021
6.6L V8 L8T Gas
971 DTC codes
2020
6.6L V8 Duramax L5P
821 DTC codes
diesel2020
6.6L V8 L8T Gas
971 DTC codes
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