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  1. S

    Acc/fcw, electronic stability control, antilock brake system all need service at once

    I have a 2020 3500 Larmie long bed. Love the truck! i am cruising down the highway with a 6000 lb trailer under tow. all of a sudden i get a series of messages flashing at me: (1) acc/fcw unavailable service required, (2) service electronic stability control, (3) service antilock brake system...