I don't know weather the newer GM trucks need one or not, but my 2014 needed a special electrical device (HBA-CAM) installed so the truck would recognize the electric over hydraulic brakes. I believe some fords need this also.
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2018 Chevy 3500 LTZ Dually Diesel 4x4 CCLB
2011 Montana 3455 SA. 6 point level up. Disc brakes. Curt Q24 Hitch. 5 step glow steps
Progressive EMS. Valterra tank valves. Sailun G637 tires. ARP fridge control. All led lighting. Mor Ryde IS
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