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2016 Chevrolet Silverado 2500 HD High Country 6.6L Excessive Emissions, Misfire, MIL Lamp on
Posted to GM Driveability on 7/31/2026 7 Replies

This LML Duramax is smoking bad out of tailpipe and misfiring. It has the listed codes for cylinder 8. I replaced the cylinder 8 injector and fuel feed tube and fuel filters but it did not help. On my scanner the cylinder 8 balance rate is 17. All other cy...

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car Vehicle Data

2016 Chevrolet Silverado 2500 HD High Country

VIN 1GC1KXE81G
Engine6.6 L / 8 cyl / DIESEL
Trans6-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsExcessive Emissions, Misfire, MIL Lamp On
OccursAlways

Trouble Codes

P0284Cylinder 8 Balance System Malfunction
P0308Cylinder 8 Misfire Detected
Open Help Request

car Vehicle Data

2016 Chevrolet Silverado 2500 HD High Country

VIN 1GC1KXE81G
Engine6.6 L / 8 cyl / DIESEL
Trans6-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsExcessive Emissions, Misfire, MIL Lamp On
OccursAlways

Trouble Codes

P0284Cylinder 8 Balance System Malfunction
P0308Cylinder 8 Misfire Detected