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Speaker 1: Today on our 2017 GMC Acadia we're going to be taking a look at and showing you how to install the SMI Stay-IN-Play DUO Supplemental Proportional Braking System, part number SM99251. Our SMI Stay-IN-Play Supplemental Braking System is going to provide a proportional braking force. As I apply the brakes, it will apply the same amount of braking force in our towed vehicle.Now… see more >
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