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2002 GMC Yukon Denali 6.0L Misfire, MIL Lamp on
Posted to GM Driveability on 3/1/2011 16 Replies

Vehicle came in for a check engine light, found code p0300, scanned and found all cylinders had some misfiring. Checked spark plugs and they were due for replacement. Installed plugs with new wires. customer drove for a few daysw and returned with CEL back on....

FIX posted 4/13/2011

16 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
SymptomsMisfire, MIL Lamp On

Trouble Codes

P0171Fuel System Too Lean (Bank 1)
P0174Fuel System Too Lean (Bank 2)
P0200Electronic Throttle Control System - Position
P0300Multiple Misfire Detected