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Thread: New GMC 3500 Dually
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05-31-2023, 02:40 PM #11
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Have a 2022 GMC 3500 towing a 337RLS under 12,000 lbs loaded. mileage so far average 8.9 mpg truck only has 11,000 miles. Might add if you can keep 65mph or under it will do better.
Last edited by Heading out; 05-31-2023 at 02:45 PM.
Mike & Karen
2021 337 RLS
2022 GMC 3500 DRW Duramax
Anderson Ultimate Hitch
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05-31-2023, 03:20 PM #12
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Two L5P’s now pulling a 310 over maybe 30,000 miles and I can say I get right at 10 mpg. I drive at 63 typically and mostly mountainous terrain. Speed will be the biggest factor. If you run at 70 be ready to pay for it. Id guess from experience there is around 3 mpg delta between 55 and 70.
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05-31-2023, 04:21 PM #13
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I am thinking you to be mighty kind with your 55-70 delta.
I would think more of a 5+ mpg delta.2018 RAM 3500 MC, CTD 6.7, 68RFE
(2nd RAM MC w/CTD 85K Hitch Miles)
2019 Imagine 2250RK, replaced hail destroyed BH (Brand X) in 2019.
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05-31-2023, 06:05 PM #14
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I have a 2020 GMC3500HD dually, crew cab, long bed, towing 2021 310GK. Weight is about 15,500. Avg 10-10.5 mpg when towing. Have a 50 gallon Titan aux tank in bed so never have to fuel up when hauling.
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05-31-2023, 06:28 PM #15
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I have a 2022 GMC Sierra 3500 CC SRW AT4 long bed with the D-Max and love it. I pull the mountains of CO every time we leave the house. Mileage varies based on all types of factors so I don't worry about it nor really track it. Speed limits are higher in the west so I pull between 75-85 MPH. You will love the truck. My neighbor friend just got a 2023 Silverado dually to pull his race trailer and loves the power as well. Good luck!
40+ Year Camping Enthusiast--Living in CO
2022 GMC Sierra 3500 AT4 CC-LB D-Max Payload 3865#--- 5000 Air Springs w/Wireless Comp
2022 GD Reflection 303RLS-- 565 watts of solar/560aH of LIPO4 batteries, 2000w inverter,
DC Starllink- Comfort Ride Shock System and Lippert Air Pin Box
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05-31-2023, 06:44 PM #16
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I know it's not a GMC but my 2017 Ford F-350 Dually with a Powerstroke 6.7 towing a 17,500+ pound Cedar Creek 5th wheel (Yes I have a Solitude 376RD on order) for 306 miles from Virginia to Myrtle Beach, SC I averaged exactly 9.5 MPG. I was cruising about 65-70 on 95 south. That is pretty typical for my rig. I have seen between high 8's to 10 depending on many factors.
Michael Dilday - Suffolk, Va.
2024 Solitude 376RD - Body paint, 3rd A/C, slide toppers, solar upgrade, 8k axle upgrade
2023 Chevrolet Silverado 3500 HD Duramax Crew Dually, B&W Companion hitch
35+ years camping
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06-08-2023, 09:23 AM #17
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Does your 303 have the stock tires with a load range E ? I know my E tires have a speed rating of 81MPH. Is that one of the "lots of upgrades" in your signature?
2019 29rs
2007 Ram diesel, 4x4 long bed
CDL with tanker, hazmat, emergency vehicle, and bus endorsements
310GK Bounce When Towing
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