GMC Sierra
B0020
The diagnostic trouble code (DTC) B0020 for a GMC Sierra T1XX (2019-Present) indicates a problem with the driver's side airbag deployment circuit, specifically related to the airbag module.
1 SolutionB-CodeBody
B
Error Code Type
Body
Components
1 affected
Electrical
Symptoms
5 common
- •Airbag warning light illuminated on the dashboard
- •Possible loss of airbag functionality in a collision
- •Seatbelt pretensioner malfunction
- +2 more
Most Affected Generations
1 generation
T1XX
1
Top Affected Components
1 component
Electrical
1
Severity Levels
1 level
high
1
Quick Facts
1
Total Solutions
1
Affected Components
5
Common Symptoms
1
Generations
All Solutions
Showing 1 of 1 solution for error code B0020 across all generations.