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very pleased with our '18 2500 CC shorty, 20-21 not towing this trip running 70-80mph.
Towing 12ish at reasonable speeds, set cruise and tow haul activate exhaust brake and the electronics operate perfectly to maintain speed up or down hill.
I installed a PullRite superslide 18k, and 22k superrail base kit.
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2020 AT4 3500 SRW Duramax SB
2018 Denali Duramax crew (traded)
2018.5 Montana 3811MS Legacy
Lippert AirRide pinbox / PullRite SuperLight hitch
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