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2002 GMC Sierra 2500 HD 6.0L Misfire
Posted to GM Driveability on 7/1/2008 10 Replies

high milage work/service truck. when first started cold or after sitting hot for a few minutes, engine runs fine at idle. run engine speed up to 3000 rpm-idle and then lose cylinders #1/2/4. induced fuel and verified ignition good, no change. engine vaccum dro...

10 Replies Received (View Replies)

  Related Documents & Media  2002 GMC Sierra 2500 HD

 
Message Closed w/FIX

car Vehicle Data

2002 GMC Sierra 2500 HD

VIN U72E240745
Engine6.0 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI / MPFI
EmissionsNot OBD-II Compliant
SymptomsMisfire
OccursAfter RPM Has Been Increased Off Idle
Misc.Cals All Current

Trouble Codes

P0300Multiple Misfire Detected
Message Closed w/FIX

car Vehicle Data

2002 GMC Sierra 2500 HD

VIN U72E240745
Engine6.0 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI / MPFI
EmissionsNot OBD-II Compliant
SymptomsMisfire
OccursAfter RPM Has Been Increased Off Idle
Misc.Cals All Current

Trouble Codes

P0300Multiple Misfire Detected