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2003 GMC Sierra 1500 HD SLE 6.0L Misfire
Posted to GM Driveability on 6/11/2007 17 Replies

Thank you in advance. I must be overlooking something. Truck came in with intermitant flashing mil, code p0300 random missfire. On road test at highway speed cylinders 1,5,6 & 8 rack up missfire data and missfire can be felt. No missfire at idle but it is not ...

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  Related Documents & Media  2003 GMC Sierra 1500 HD SLE

 
Message Closed w/Summary

car Vehicle Data

2003 GMC Sierra 1500 HD SLE

VIN 1GTGK13U03
Engine6.0 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsMisfire

Trouble Codes

P0300Multiple Misfire Detected
Message Closed w/Summary

car Vehicle Data

2003 GMC Sierra 1500 HD SLE

VIN 1GTGK13U03
Engine6.0 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsMisfire

Trouble Codes

P0300Multiple Misfire Detected