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  1. Engines/Performance/Tech Questions
    In 2004, I drove a brand new black [email protected]#extended cab Colorado z71 off the lot. [email protected]#It's been my daily driver ever since and now has close to 160,000 miles. I've taken good care of it, but at 117,000 miles, much like everyone else's 3.5, it started running a little rougher and threw the code for...
  2. I4/I5 Engine & Drivetrain
    So heres the deal, i took my '06 truck into my mechanics last weekend cause i noticed that it was idling rough. They determined that the seals on my heads were bad and i had them look up the description of the cylinder head service bulletin and they said that is what the problem was. My truck...
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