Question about 2005 GMC Yukon Xl Denali

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What sparkplugs is the best for a 2005 Denali Yukon xl with a 6.0 motor? Also what could I do to get the maxium gas milage and add horse power? This is a non-diesel engin. Also I notice that the gas filter is located inside the gas tank. Does it need to be changed?

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1 Answer

You use the spark plugs recommended in your owners manual

Any brand but same OEM electrode configuration


You can not add horse power to any vehicle without
modifications,common sense.


Change front O2 Sensors at 100,00 miles
Clean MAF Sensor

Forget the fuel filter if in the tank

Posted on May 23, 2011

  • bangin_on_wa May 23, 2011

    Okay, so what modifications could I use that will give me more horse power and encreas my mpg?

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