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engine serial number

  1. What year is my engine?

    I4/I5 Engine & Drivetrain
    I have a 2007 GMC Canyon. When I bought it, the inner front fender splash shields were missing and some really weird stuff under the hood was not connected or loose. So, I thought the engine was changed at some point. Now I am working on it and ordered some parts and changed them. Serpentine...