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Grand Design Solitude 310GK

Fifth wheelbuilt 2017– (in production)Better build tierCommon on the used market
WHAT ONE COSTS
$157,200MSRP today

Still in production. A used 2023 would run roughly $92,700.

WHAT IT WEIGHS BEHIND YOUR TRUCK
~14,692 lbestimated as towed, for 2 people

dry weight 13,200 lb + fresh water (83 gal, full) 692 lb + propane + battery 200 lb + gear for 2 600 lb. Brochure dry weight omits water, propane, batteries and your gear; this estimate doesn't.

You want a tow rating around16,325 lb (10% margin)
GVWR (the sticker maximum)19,000 lb
Tongue weight, loaded~2,616 lb (18%)
WHICH TOW VEHICLES IT FITS: 19 OF 95

Judged the way the app judges: estimated loaded weight against each vehicle's rating less a 10% margin, per model year, because the 310GK's published weights changed mid-run. Fifth wheels also need a pickup bed and are held to the fifth-wheel rating where published.

VEHICLETOW RATINGVERDICT
Chevrolet Silverado / GMC Sierra 2500HD (Duramax, max tow) '24-2622,500 lbfits, loaded, with 10% margin
Chevrolet Silverado / GMC Sierra 2500HD (Duramax) '20-2318,510 lbfits, loaded, with 10% margin
Chevrolet Silverado / GMC Sierra 2500HD (Duramax) '11-1918,100 lbfits, loaded, with 10% margin
Chevrolet Silverado / GMC Sierra 3500HD (Duramax DRW, gooseneck) '20-2636,000 lbfits, loaded, with 10% margin
Chevrolet Silverado / GMC Sierra 3500HD (Duramax DRW, gooseneck) '11-1923,300 lbfits, loaded, with 10% margin
Ford F-250 Super Duty (6.7 diesel, gooseneck) '20-2222,800 lbfits, loaded, with 10% margin
Ford F-250 Super Duty (6.7 diesel, tow pkg) '17-1918,000 lbfits, loaded, with 10% margin
Ford F-250 Super Duty (6.7 diesel) '11-1616,600 lbfits, loaded, with 10% margin
Ford F-250 Super Duty (6.7 HO diesel, gooseneck) '23-2623,000 lbfits, loaded, with 10% margin
Ford F-350 Super Duty (6.7 diesel DRW, gooseneck) '17-1932,500 lbfits, loaded, with 10% margin
Ford F-350 Super Duty (6.7 diesel DRW, gooseneck) '20-2237,000 lbfits, loaded, with 10% margin
Ford F-350 Super Duty (6.7 diesel DRW, gooseneck) '11-1621,600 lbfits, loaded, with 10% margin
Ford F-350 Super Duty (6.7 HO diesel DRW, gooseneck) '23-2638,000 lbfits, loaded, with 10% margin
Ford F-450 Super Duty (6.7 HO diesel DRW, gooseneck) '23-2640,000 lbfits, loaded, with 10% margin
Ram 2500 (6.7 Cummins HO) '19-2620,000 lbfits, loaded, with 10% margin
Ram 2500 (6.7 Cummins) '11-1817,980 lbfits, loaded, with 10% margin
Ram 3500 (6.7 Cummins DRW, gooseneck) '13-1831,210 lbfits, loaded, with 10% margin
Ram 3500 (6.7 Cummins HO DRW, gooseneck) '25-2636,610 lbfits, loaded, with 10% margin
Ram 3500 (6.7 Cummins HO DRW, gooseneck) '19-2437,090 lbfits, loaded, with 10% margin
The 76it doesn't fit

These verdicts assume 2 people aboard with typical gear. See the margin for your truck and your crew →

THE SPECS
Length34.3 ft
Height (incl. A/C)13.4 ft
Width8.4 ft
GVWR19,000 lb
Dry weight13,200 lb
Dry tongue weight2,350 lb
Sleeps4
Slide-outs3
Axles2
Fresh water83 gal
Grey water106 gal
Black water53 gal
Air conditioning15,000 BTU
Solar (standard)330 W

A missing row means the maker never published that figure: unknown, not zero.

WHERE PEOPLE SLEEP
  • 1× Front queen bed with walk-in closet (king available)(Permanent)60×80
  • 1× Tri-fold hide-a-bed sofa in rear living(Convertible)—
HOW IT'S BUILT: 4/5
WallsLaminated fiberglass
FrameAluminum
RoofWalk-on
UnderbellyEnclosed

Grand Design (Better tier): Solitude is Grand Design's full-profile flagship: R-11 welded-aluminum laminated walls, 101" widebody chassis, MORryde independent suspension and 17.5" H-rated tires — genuine full-time-capable construction.

YEAR BY YEAR: WHAT CHANGED
YEARSGVWRDRYMSRP
2017–2415,000 lb12,100 lb$157,160
2025–2619,000 lb12,100 lb$141,620
  • 2017Introduced at 34' 11", 15,000 lb GVWR and 12,100 lb dry
  • 2024Length trimmed to 34' 4"
  • 2025GVWR raised from 15,000 to 19,000 lb — cargo capacity jumps from 2,900 to 6,900 lb; MSRP $139,400
  • 2026MSRP $141,620
  • 2027Dry up to 13,200 lb; MSRP $157,160
FINDING ONE

Common: usually several for sale within a day’s drive. Why: 10-year production run; still in production. Estimated from build volume and production span, not a count of live listings.

OUR TAKE

The smallest Solitude, and the one where the 2025 GVWR change matters most: a pre-2025 310GK legally carries less than half the cargo of a new one at the same dry weight.

OTHER SOLITUDE FLOORPLANS
2930RL · 15,000 lb · sleeps 2305RE · 16,000 lb · sleeps 43330RE · 16,800 lb · sleeps 6344GK · 16,800 lb · sleeps 6345GK · 16,800 lb · sleeps 43460FL · 16,800 lb · sleeps 63540GK · 16,800 lb · sleeps 43550BH · 16,800 lb · sleeps 8366DEN · 16,000 lb · sleeps 5370DV · 19,000 lb · sleeps 4372WB · 16,800 lb · sleeps 4373FB · 16,800 lb · sleeps 43740BH · 16,800 lb · sleeps 8374TH · 20,000 lb · sleeps 6the whole line →
Find one for sale

Live listings for the 310GK on the big marketplaces. Each search opens pre-filled with this exact floorplan:

RV Trader ↗Camping World ↗FB Marketplace ↗Google ↗

Inventory varies by site and day. Slim pickings? search the whole Solitude line ↗

Is the 310GK your #1, or just a spec sheet?

These are the facts. Whether it beats the other six thousand rigs for you depends on what you care about. Set your priorities as sliders, switch on your hard limits, and watch the whole market re-rank around them. Every exclusion explained, every margin shown.

See where it ranks for you →

Data compiled from manufacturer spec sheets, retrieved 2026-07.