Question about 2004 Chevrolet Tahoe
The most common cause for these codes is a vacuum leak and the most common cause for the vacuum leak is the plenum gaskets. With the vehicle cold you should be able to spray carb spray around the area where the plenum bolts to the heads and hear the RPM's change when you hit the leak. If this is the case the plenum gaskets are a fairly easy do it yourself repair.
Posted on Nov 08, 2010
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Posted on Jan 02, 2017
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