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2020 GMC 2500 Denali 6.6 Duramax with a Demco 21K auto slide. 10 to 12 on flat ground at 60 mph no wind. 8 with a headwind....
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Tony & Donna
2022 Montana HC, 295RL, Solar Flex 400, Onan 3600 LPG, 2K inverter, 200AH Lithium. 2020 GMC Denali 2500 6.6 Duramax, Demco 21K Auto Slide
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