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1999 GMC C1500 Suburban 5.7L Misfire
Posted to GM Driveability on 4/3/2013 22 Replies

thanks in advance,, truck came to us after all the listed parts were replaced, fuel press, is in spec, short fuel trim is at 130 all the time at idle is this normal or high ,both banks, have checked for vac, leak dont find one, tried new air flow meter and map...

22 Replies Received (View Replies)

  Related Documents & Media  1999 GMC C1500 Suburban

 
Message Closed w/Summary

car Vehicle Data

1999 GMC C1500 Suburban

VIN 3GKEC16R1X
Engine5.7 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsMisfire
OccursCruise

Trouble Codes

P0300Multiple Misfire Detected
Message Closed w/Summary

car Vehicle Data

1999 GMC C1500 Suburban

VIN 3GKEC16R1X
Engine5.7 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsMisfire
OccursCruise

Trouble Codes

P0300Multiple Misfire Detected