GMC Sierra
P0300-P0306
The GMC Sierra T1XX (2019-Present) is experiencing engine misfire issues, which may lead to poor performance and increased emissions.
2 SolutionsP-CodePowertrain
P
Error Code Type
Powertrain
Components
1 affected
Engine
Symptoms
10 common
- •Check engine light illuminated
- •Rough idle or stalling
- •Loss of power during acceleration
- +7 more
Most Affected Generations
1 generation
T1XX
2
Top Affected Components
1 component
Engine
2
Severity Levels
1 level
high
2
Quick Facts
2
Total Solutions
1
Affected Components
10
Common Symptoms
1
Generations
All Solutions
Showing 2 of 2 solutions for error code P0300-P0306 across all generations.