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Home/DTC Codes/GMC/Sierra 3500HD

GMC Sierra 3500HD DTC Codes

Select your year and engine to view applicable diagnostic trouble codes.

3 Configurations

2020-2024

6.6L V8 L8T

971 DTC codes

2017-2024

6.6L V8 Duramax Diesel

821 DTC codes

diesel

2007-2016

6.6L V8 Duramax Diesel

821 DTC codes

diesel

View GMC Sierra 3500HD Labor Times | View Torque Specs | View Fluid Specs