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2012 GMC Sierra 1500 SLT 5.3L Misfire, MIL Lamp on
Posted to GM Driveability on 9/4/2018 28 Replies

Hello GMC fans and tech's, we have a miss on 4 that sets a code and light flashes, we swapped spark plugs, and then the coil, made sure both coil and injector were getting a signal from the ECM, swapped injector, did a compression test, also a engine runni...

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  Related Documents & Media  2012 GMC Sierra 1500 SLT

 
Message Closed w/Summary

car Vehicle Data

2012 GMC Sierra 1500 SLT

VIN 3GTP2WE78C
Engine5.3 L / 8 cyl / FLEX
Trans6-speed Automatic (Electronic)
DeliveryFuel Injection / MFI
EmissionsOBD-II Compliant
SymptomsMisfire, MIL Lamp On
OccursAlways

Trouble Codes

P0300Multiple Misfire Detected
Message Closed w/Summary

car Vehicle Data

2012 GMC Sierra 1500 SLT

VIN 3GTP2WE78C
Engine5.3 L / 8 cyl / FLEX
Trans6-speed Automatic (Electronic)
DeliveryFuel Injection / MFI
EmissionsOBD-II Compliant
SymptomsMisfire, MIL Lamp On
OccursAlways

Trouble Codes

P0300Multiple Misfire Detected