GMC Sierra
P0304
The vehicle, a GMC Sierra T1XX (2019-Present), is experiencing a diagnostic trouble code (DTC) P0304, which indicates a misfire detected in cylinder 4.
1 SolutionP-CodePowertrain
P
Error Code Type
Powertrain
Components
1 affected
Engine
Symptoms
5 common
- •Check engine light illuminated
- •Rough idle or engine vibration
- •Decreased engine power
- +2 more
Most Affected Generations
1 generation
T1XX
1
Top Affected Components
1 component
Engine
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 P0304 across all generations.