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2002 GMC Yukon Denali 6.0L Poor Idle Quality, Misfire, MIL Lamp on
Posted to GM Driveability on 4/15/2010 6 Replies

what i noticed though is only when the car is idling at 560 rpm it starts to mis and as soon as you step on the gas a little the mis disappears and the idle goes to 6xx rpm, and stays there for about a solid min or so, then back down to 560 and the mis retuns....

FIX posted 4/30/2010

6 Replies Received (View Replies)

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car Vehicle Data

2002 GMC Yukon Denali

Engine6.0 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Misfire, MIL Lamp On
OccursAlways, Idle

Trouble Codes

P0300Multiple Misfire Detected