p0300
Moderate
Chevrolet · Trucks
Random/Multiple Cylinder Misfire Detected
Quick Answer
Error code P0300 on your Chevrolet Trucks means: Random/Multiple Cylinder Misfire Detected. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
CK15706Colorado LT 2024Colorado Trail Boss 2024Colorado WT 2024Colorado Z71 2024Colorado ZR2 2024Silverado 1500 Custom 2024Silverado 1500 High Country 2024Silverado 1500 LT 2024Silverado 1500 LT Trail Boss 2024Silverado 1500 LTZ 2024Silverado 1500 RST 2024Silverado 1500 WT 2024Silverado 1500 ZR2 2024Silverado 2500HD High Country 2024Silverado 2500HD LT 2024Silverado 2500HD LTZ 2024Silverado 2500HD WT 2024CL14543CS10403CK10743CK10543CK20943CK30943CK10906
Likely Causes
How to Fix It
1
Read freeze frame data and check for companion codes identifying specific cylinders
2
Remove and inspect spark plugs for wear, fouling, or incorrect gap
3
Test ignition coil packs individually by swapping between cylinders
4
Perform a fuel injector balance test to identify weak injectors
5
Check for vacuum leaks using a smoke machine or propane enrichment test
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Spark plugs (full set)
Ignition coil packs
Spark plug wires (if applicable)
Fuel injectors
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