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Richard Hallman

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  1. Richard Hallman
    My 2021 Sierra 1500 AT4 with 24000 miles, today the service ESC and parking brake screen came on. Cab started shaking if I drove above 45 mph. Steering screen on truck said to be careful. I was pulling a trailer at the time. Was wondering if the light hook up from trailer to truck might have messed with trucks computer system.
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