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Heartland Big Country 3900FLP

Fifth wheelbuilt 2015–16Mixed build tierFindable on the used market
WHAT ONE COSTS
$48,300est. used (2016, 10 yr old)

Sticker was $90,771 in 2016. Out of production since 2016, so the used market is the only way to buy one. Estimate assumes a 2016 unit.

WHAT IT WEIGHS BEHIND YOUR TRUCK
~15,190 lbestimated as towed, for 2 people

dry weight 13,764 lb + fresh water (75 gal, full) 626 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 around16,880 lb (10% margin)
GVWR (the sticker maximum)16,000 lb
Tongue weight, loaded~2,836 lb (19%)
Cargo capacity2,236 lb
WHICH TOW VEHICLES IT FITS: 18 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 3900FLP'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 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 77it doesn't fit

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

THE SPECS
Length42.0 ft
Height (incl. A/C)13.3 ft
Width8.0 ft
GVWR16,000 lb
Dry weight13,764 lb
Dry tongue weight2,570 lb
Cargo capacity2,236 lb
Sleeps4
Slide-outs6
Axles2
Fresh water75 gal
Grey water90 gal
Black water45 gal
Air conditioning30,000 BTU
Awning18 ft

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

WHERE PEOPLE SLEEP
  • 1× front king bed(Permanent)—
  • 1× dinette converts to a bed(Convertible)—
  • 1× hide-a-bed sofa(Convertible)—
HOW IT'S BUILT: 5/5
WallsAzdel composite
FrameAluminum
RoofWalk-on
UnderbellyEnclosed

Heartland (Mixed tier): Heartland's near-luxury fifth wheel - Azdel laminated walls, a 12 in. powder-coated steel I-beam frame and dual 15,000 BTU A/C - built from 2007 through model year 2024.

YEAR BY YEAR: WHAT CHANGED
YEARSGVWRDRYMSRP
201516,000 lb14,355 lb$90,771
201616,000 lb13,764 lb$90,771
  • 2015Introduced
  • 2016Slide count increased to six
FINDING ONE

Findable: a few listed nationwide most weeks. Why: Heartland is a volume manufacturer; only 2 model years; 10 years out of production. Estimated from build volume and production span, not a count of live listings.

OUR TAKE

Six slide rooms - the most Heartland ever put on a Big Country.

OTHER BIG COUNTRY FLOORPLANS
3070RE · 15,500 lb · sleeps 43150RL · 15,500 lb · sleeps 43155RLK · 16,000 lb · sleeps 43200RLK · 16,000 lb · sleeps 43450TS · 15,500 lb · sleeps 43460GK · 16,500 lb · sleeps 43500SS · 16,500 lb · sleeps 43502RKI · 16,500 lb · sleeps 43560SS · 16,000 lb · sleeps 63650RL · 15,500 lb · sleeps 43700FL · 16,000 lb · sleeps 43702FB · 16,250 lb · sleeps 43703RK · 16,500 lb · sleeps 63705FB · 16,500 lb · sleeps 4the whole line →
Find one for sale

Live listings for the 3900FLP 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 Big Country line ↗

Is the 3900FLP 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.