2026 Forest River Sierra 3990FL
New Fifth Wheel in Mesa, Arizona, 85213
$79,999.00
Unit Specs
- Stock #348072
- Year2026
- ManufacturerForest River
- Make Forest River
- ModelSierra
- Floorplan3990FL
- Type Fifth Wheel
- ConditionNew
- Length43' 0"
- Width8' 0"
- Height13' 0"
- VIN4X4FSES22TJ055395
- MSRP $114,792.00
- Sale Price $79,999.00
- Need to know your payment? Use our RV Loan Calculator!
- Sleeps8
- Slideouts5
Looking to buy a 2026 Forest River Sierra Fifth Wheel RV?
**Forest River Sierra fifth wheel 3990FL highlights:** - King Bed - Front Living Area - Two Tri-Fold Hide-A-Beds - Theater Seating The perfect fifth wheel for a larger family! This unit sleeps eight people the loft above the rear master bedroom and bathroom. In the 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 one-piece fiberglass shower for comfort. 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 cambered powder coated frame with rust prohibitor construction allows for more duration of the fifth wheel. Each model also comes with a TV antenna with booster, 60,000BTU on demand tankless water heater, Goodyear Radial tires with 7,000 lb. axles, and the list goes on. The interior is just as impressive with Beachside Sundance Congoleum linoleum, recessed residential lighting, a memory foam mattress, and hidden hinged, soft close drawers and cabinets!
2026 Forest River Sierra 3990FL Features
2026 Forest River Sierra 3990FL Specifications
Dimensions
Height
13' 4"
Length
43' 6"
Width
8' 0"
Weights
Dry Weight
12,439 lbs
GVWR
15,375 lbs
Hitch Weight
2,825 lbs
Payload Capacity
2,936 lbs
Capacities
Refrigerator Capacity
16 cu ft
Sleep Capacity
10
Water Capacity - Black
50 gal
Water Capacity - Fresh
50 gal
Water Capacity - Grey
80 gal
Exterior
# Awnings
1
# Axles
2
# Doors
1
# Slides
5
Hitch
Fifth Wheel
Electrical
# A/C
2
A/C Spec
Dual ducted 15k BTU Air Conditioners, prepped for 3rd 15k BTU A/C
2026 Forest River Sierra 3990FL Literature
Call:
480-956-8358
Stock #: 348072
Unit Specs
- Stock #348072
- Year2026
- ManufacturerForest River
- Make Forest River
- ModelSierra
- Floorplan3990FL
- Type Fifth Wheel
- ConditionNew
- Length43' 0"
- Width8' 0"
- Height13' 0"
- VIN4X4FSES22TJ055395
- MSRP $114,792.00
- Sale Price $79,999.00
- Need to know your payment? Use our RV Loan Calculator!
- Sleeps8
- Slideouts5
Looking to buy a 2026 Forest River Sierra Fifth Wheel RV?
Estimated Payment-
Interest Rate
% *(W.A.C.)
Term
Years
Down Payment $
*W.A.C. = With approved credit
Email Dealer
Request More Info on this 2026 Forest River Sierra 3990FL Offered for sale by General RV Center
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