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big 3 upgrade

  1. Audio, Video, and Electronics
    (2007 impala 3.5)I'm adding another battery in the trunk and also upgrading the alternator for the amp I'm putting in,,,,,,, is the car gonna like me doing the "big 3 upgrade" or will it set off a few sensors and stuff. I think someone said that there is a lil sensor thing that the wires from...