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  1. GM Powertrain
    howdy folks, the tired 4.8 and 4l60 in my 03 sierra is looking mighty fine for a drivetrain swap, what does it realistically take to do a gen 4 swap with a 6l80/6l90 and to be able to have someone who doesn't know anything about the truck feel like its a regular truck? I'm so sick and tired of...
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