2025  Forest River  Sierra Fifth Wheels 3990FL  - 053645

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!

Standard Features (2025)

Exterior Features

• Automatic Electric Level-Up System
• 2" Towing and Accessory Hitch (Where Available)
• 7,000lb axles with Anti-lock Braking System
• Goodyear Radial Tires w/ anti-lock brakes
• Lippert auto adjust brakes
• GoPower 200W roof mounted solar panel with controller and battery
• Quad MORryde® step above with strut (Where Available)
• Color matched high gloss gel coated colored exterior fiberglass
• Painted two tone aerodynamic fiberglass front cap with improved turning radius
• Underbelly Armor
• TST Tire Pressure Monitoring System
• Enclosed and heated dump valves
• 16" Spare tire kit
• Large tinted windows with 80/20 UV prohibitor
• Electric awning with LED light strip
• Prepped for Lippert On-The-Go Ladder
• Power front jacks with spring loaded pins
• Automotive-style fender skirts
• Hitch light
• Porch light with interior switch
• 30 lb. double LP tanks with auto change over
• Rain gutters with extra long drip spouts (Prevents black streaking)
• Insulated heavy duty slam lock baggage doors
• Exterior foldable grab handle
• Unobstructed pass through storage area
• Upgraded aluminum rims
• Oversized friction hinge entry door
• Exterior LP Quick Connect with Grill/Griddle Cooktop

Interior Features

• Solid Surface Kitchen Counter tops
• Fiberglass one-piece shower with folding teak seat
• Washer and Dryer Prep
• 6' 4" slide-out height
• Stainless steel kitchen package
• Beachside sundance linoleum
• Hidden hinged, soft close drawers and cabinets
• Full extension ball bearing drawer guides
• Stainless steel under mounted kitchen sink
• Trash receptacle in kitchen
• Decorative backsplash
• Two color coordinated interiors
• LED lighting throughout
• Recessed residential lighting
• Accent lighting over dinette
• Extra large, panoramic picture windows throughout
• Vented side windows in slide-outs
• TV antenna with booster
• Solid wood drawer fronts with birch sides
• Solid wood, square inset cabinet doors, painted or wood grain
• Bedroom slide-out fascia
• Memory foam mattress
• Teddy Bear® bunk mats
• 50" flatscreen smart TV
• JBL Aura Cube FM/Bluetooth media center
• Designer window treatment
• Ceiling fan
• Tri-fold hide-a-bed sofa
• Quilted bedspread

Appliances/Systems

• Dual ducted 15k BTU Air Conditioners, prepped for 3rd 15k BTU A/C
• 17 cu. ft. 12V refrigerator
• 60,000BTU On Demand Tankless Water Heater
• 40,000BTU furnace
• Heated Holding Tanks (12V)
• Floor ducted 40,000BTU furnace
• 30" OTR stainless steel microwave
• Chef collection 3 burner / 24" oven with drawers
• Interior monitor panel for holding tanks
• Satellite and cable hookup with RG-6 cable for high quality picture
• Porcelain foot flush toilet(s)
• 65 Amp converter
• Power fan in Kitchen and Bathroom(s)
• Full coach water filtration system

Construction

• Welded aluminum-framed, vacuum bonded laminated superstructure
• 5/8" tongue and groove plywood floor decking
• 2 x 3 floor joists, 12" on center
• Laminated sidewalls
• 3/8" roof decking (Full walk-on roof)
• Cambered powder coated frame with rust prohibitor
• Underbelly armor
• 5" truss roof rafters
• R-10, 2" sidewall construction
• Laminated slide-out walls

For Your Safety

• Smoke alarm
• Fire extinguisher
• Breakaway switch (Battery hook-up required)
• Dead-bolt lock on entry door
• LP/CO2 gas detector
• Fire escape windows

Popular Options

• Free Standing Dinette in place of Booth (3550BH only)
• Two chairs in place of ottoman bench
• Central vacuum
• Slide room awnings (N/A dinette slides)
• Washer and Dryer

Polar Tech Package (Optional)

• Dual pane windows
• 3rd AC power saver direct dump system w/ wall thermostat

Summit Package

• Electric Auto Leveling System
• Goodyear Tires with 7,000 lb axles
• 2" Rear Receiver Hitch and 4-Pin Connector (Where Available) (NA 4002FB and 3990FL)
• Two 15,000BTU Air Conditioners
• Power fan in Kitchen and Bathroom(s)
• Anti-lock Braking System
• Tire Pressure Monitoring System
• 60,000BTU On Demand Tankless Water Heater
• BoonDocker Solar System-200W Panel with controller & battery
• MORryde Steps with Strut (Where Available)
• Heated and Enclosed Holding Tanks (12V pads)
• Washer and Dryer Prep
• King Wi-Fi Extender System and Olympus Antenna
• Underbelly Armor
• Soft Close Residential Drawers & Cabinets Throughout
• 50" Flat Screen smart TV
• 4 Camera Security Prep with Back-Up Camera prep
• Full Coach Water Filter System
• Enclosed, One-Piece Docking Station
• Color Matched Gel coated Fiberglass Exterior
• Aerodynamic Two Tone Fiberglass Painted Front Cap with Lights
• High Efficiency Radiant Foil (Roof and Floor)
• Spare Tire

Chef's Kitchen Package

• 16 cu. ft. Stainless Refrigerator (12V)
• Stainless Range with Cast Iron Grates
• Solid Surface Countertops
• Stainless Apron Sink with Strainer
• Commercial Style Kitchen Faucet
• 30" Over-the-Range Stainless Microwave
• Countertop Extension
• Designer Backsplash

Please see us for a complete list of features and available options!

All standard features and specifications are subject to change.

All warranty info is typically reserved for new units and is subject to specific terms and conditions. See us for more details.

Due to the current environment, our features and options are subject to change due to material availability.