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Keystone Fuzion 337

Fifth wheelbuilt 2024– (in production)Mixed build tierFindable on the used market
WHAT ONE COSTS
$107,800MSRP today

Still in production. A used 2023 would run roughly $63,600.

WHAT IT WEIGHS BEHIND YOUR TRUCK
~14,864 lbestimated as towed, for 2 people

dry weight 13,280 lb + fresh water (94 gal, full) 784 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 around16,520 lb (10% margin)
GVWR (the sticker maximum)16,900 lb
Tongue weight, loaded~3,285 lb (22%)
Cargo capacity3,620 lb
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 337'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
Length37.6 ft
Height (incl. A/C)13.3 ft
Width8.3 ft
GVWR16,900 lb
Dry weight13,280 lb
Dry tongue weight2,935 lb
Cargo capacity3,620 lb
Sleeps8
Slide-outs3
Axles2
Fresh water94 gal
Grey water88 gal
Black water88 gal

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

WHERE PEOPLE SLEEP
  • 1× Front king bed suite(Permanent)—
  • 2× Garage electric beds(Stow-away)—
  • 2× Garage flip-down sofas(Convertible)—
HOW IT'S BUILT: 4/5
WallsLaminated fiberglass
FrameAluminum
RoofWalk-on
UnderbellyEnclosed

Keystone (Mixed tier): Keystone RV

YEAR BY YEAR: WHAT CHANGED
YEARSGVWRDRYMSRP
202416,890 lb12,840 lb$107,772
2025–16,900 lb13,280 lb$107,772
  • 2024Introduced in the Impact Edition lineup at 36'7" / 12,840 lb
  • 2027Grew to 37'7" and 13,280 lb, black tank up from 74 to 88 gal
FINDING ONE

Findable: a few listed nationwide most weeks. Why: Keystone is a volume manufacturer; still in production. Estimated from build volume and production span, not a count of live listings.

OUR TAKE

Fuzion Impact Edition - the entry three-slide fifth wheel with an 11-foot garage on 7,000 lb tandem axles.

OTHER FUZION FLOORPLANS
3120 · 16,670 lb · sleeps 83423 · 16,745 lb · sleeps 8343 · 16,900 lb · sleeps 8359 · 16,880 lb · sleeps 8361LT · 15,800 lb · sleeps 8367 · 16,615 lb · sleeps 8369 · 17,000 lb · sleeps 8373 · 19,745 lb · sleeps 8379 · 17,000 lb · sleeps 8415 · 19,000 lb · sleeps 8418 · 18,362 lb · sleeps 8419 · 21,000 lb · sleeps 8421 · 20,000 lb · sleeps 8422 · 20,000 lb · sleeps 8the whole line →
Find one for sale

Live listings for the 337 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 Fuzion line ↗

Is the 337 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.