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Thanks for the tips, I will start sorting through them tomorrow. Nathan Z.

Also my mpg dropped from over 16mpg to around 13mpg since the code came up. Thanks, Nathan

Hello all, I have a 2000 "old body style" Z71 Chevy Tahoe. In Oct 2008 I had a new 5.7L long block, plug wires, dist cap, rotor and crank case sensor put in. Didn't change any O2 sensors. It ran fine, but they reused the old timing chain cover, it states right on it not to reuse so I...