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Speaker 1: Today on our 2018 GMC Acadia, we're going to be installing SMI's stay and play duo supplemental braking system. Part number SM99251.This proportional braking system is going to apply the brakes in your vehicle as you're going down the road whenever you hit the brakes in your RV. Once your control unit detects a brake signal from your RV, it will check the internal inertia… see more >
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