OK, I just measured diagonal "A" measurement and it went from 70.5" to 71"
Additionally, the top of the pinbox is about 3/16" from the bottom of the plastic under belly and pushes up to press on the underbelly when lifted.
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2011 2955RL Gen-Y Executive Kingpin
2022 GMC 2500HD Duramax/Alison
4X4 Crew Cab/Standard bed.
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