2026 FOREST RIVER SIERRA 3990FL
Description
New 2026 Forest River RV Sierra 3990FL
Details: Forest River Sierra fifth wheel 3990FL highlights: Full and Half Lofts King Bed Walk-In Shower Front Living Area Two Tri-Fold Hide-A-Beds Theater Seating The perfect fifth wheel for a larger family! This unit sleeps eight or more with the full and half lofts above the rear master bedroom and bathroom. In the full loft area there are two 44" x 74" bunk mats for comfort as well as wardrobe/storage at the head of each. The master bedroom features a king size bed that slides out to create more space by the bed. A spacious bath features a walk-in shower for comfort and includes a seat so you can relax while you shower. A spacious kitchen features two slides, a free standing dinette in one, and the 12V refrigerator and stove in the other. There is also a center island with large sink for added food prep space. Head up the steps in front to a dual slide front living area with 50" TV and fireplace beneath the window. There is also theater seating opposite the TV, and a tri-fold hide-a-bed in each slide allowing added sleeping space when needed. Each one of these Forest River Sierra fifth wheels are equipped with everything you need to make the most of each adventure! The underbelly armor will protect your unit's vitals from road debris and the painted two tone aerodynamic fiberglass front cap has an improved turning radius to make them easier to navigate. With an electric leveling system, you can set your unit up quick and easy then get to having fun faster than ever. The welded aluminum framed, vacuum bonded laminated superstructure will hold up through every adventure and the cambered powder coated frame comes with rust prohibitor to last longer. Each model also includes the Summit Package that comes with a king Wi-Fi extender system and Olympus antenna, a full coach water filter system, Goodyear tires with 7,000 lb. axles, and the list goes on. The interior is just as impressive with rustic wood plank linoleum, recessed residential lighting, a memory foam mattress, and mocha accent crown molding over the kitchen cabinets!
SleeperSize: King
WeightDry: 12439Specifications
Stock Number82216
VIN4X4FSES28TJ054851
Year2026
CategoryFifth Wheel
ManufacturerFOREST RIVER
ModelSIERRA 3990FL
LocationGreencastle, Pennsylvania 17225
ConditionNew
Fresh Water Tank Capacity50 gal
Gray Water Tank Capacity80 gal
Black Water Tank Capacity50 gal
Sleeps8
Number of Slide Outs5
Washer / DryerYes
Number of AxlesTandem
Gross Vehicle Weight15,375 lb
Hitch Weight2,825 lb
Exterior Length43 ft 6 in
Exterior Width8 ft
Exterior Height13 ft 4 in
Interior ColorSWITCHBACK
Furnace BTUs40000
Stock Number82216|
VIN4X4FSES28TJ054851|
Year2026|
CategoryFifth Wheel|
ManufacturerFOREST RIVER|
ModelSIERRA 3990FL|
LocationGreencastle, Pennsylvania 17225|
ConditionNew|
Fresh Water Tank Capacity50 gal|
Gray Water Tank Capacity80 gal|
Black Water Tank Capacity50 gal|
Sleeps8|
Number of Slide Outs5|
Washer / DryerYes|
Number of AxlesTandem|
Gross Vehicle Weight15,375 lb|
Hitch Weight2,825 lb|
Exterior Length43 ft 6 in|
Exterior Width8 ft|
Exterior Height13 ft 4 in|
Interior ColorSWITCHBACK|
Furnace BTUs40000|
