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  1. Weird transmission problem, please help

    I4/I5 Engine & Drivetrain
    I really hope someone can help me. I drive an automatic 2006 z85 colorado i-5 3.5l. Yesterday I was driving around 50 mph and randomly noticed that it was reving much to high to be cruising at 50. so i stopped, turned the vehicle off, and restarted it. I then accelerated like i normally would...
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