Question about 2007 GMC Yukon
Seems like an air or fuel problem
Knock Sensors under the intake manifold. There are 2. Replace both, it takes 3 or four hours to pull apart the manifold and re-install. All fuel lines have to be disconnected and needs a special tool. While you have the intake off, spray 3 or 4 cans of throttle body cleaner thru the plastic manifold. The parts only take ten minutes to replace, once you get to them. Make sure you use good 100% silicone on the new ones so it does not happen again. Once you get it back together, it will run like a champ. Hope this helps
Posted on Jul 06, 2009
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Posted on Jan 02, 2017
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