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  1. 06 Silverado/ pac os-2x

    Member Garages
    New here so patience please and thank you in advance. 06' Silverado, no swc, Bose or on-star. Installing a pioneer avh-120bt bought the pac os-2x. Fairly simple to hookup. The head unit turning off and on which I think is a firmware update in the pac, but I also have poor sound quality. All my...