GMC Sierra
P0300
The P0300 code indicates a random/multiple cylinder misfire detected in a 2019-present GMC Sierra T1XX. This code suggests that the engine's computer has detected misfires occurring in various cylinders, which can lead to rough engine performance and potential damage over time.
42 SolutionsP-CodePowertrain
P
Error Code Type
Powertrain
Components
1 affected
Engine
Symptoms
10 common
- •Check engine light illuminated
- •Rough idle
- •Loss of power during acceleration
- +7 more
Most Affected Generations
1 generation
T1XX
42
Top Affected Components
1 component
Engine
42
Severity Levels
1 level
high
42
Quick Facts
42
Total Solutions
1
Affected Components
10
Common Symptoms
1
Generations
All Solutions
Showing 42 of 42 solutions for error code P0300 across all generations.