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1999 GMC Yukon Denali 5.7L Poor Idle Quality, Misfire
Posted to GM Driveability on 6/21/2011 13 Replies

Ok, i have beat my head off the wall long enough, here goes. I have a 99 Yukon with Vin R 5.7L. It came in with intake gaskets leaking into crankcase; replaced with steel fel-pro set and set cam retard to 0 degrees, trucj ran like a champ. That was on thursday...

FIX posted 6/22/2011

13 Replies Received (View Replies)

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car Vehicle Data

1999 GMC Yukon Denali

Engine5.7 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Misfire
OccursUnder Load, Idle

Trouble Codes

P0300Multiple Misfire Detected