New 2026 Forest River RV Sierra 3990FL Fifth Wheel

FREIGHT, PREP, DETAIL AND WALK-THROUGH INCLUDED! ALSO, NATIONAL SHIPPING AVAILABLE!
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2026 3990FL Features and Options

New 2026 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

 

 

What Our Customers Are Saying

Friendly Staff!

A lot of fun and friendly people work at this dealership and they took the stress out of the purchasing process. Our sales person was Kasey and my wife and I both loved her. She answered all our questions and was very straightforward about everything. I was also impressed with the candor of the two technicians they provided during the delivery process. They explained the camper to us and gave us a - Daniel
Sale Price: $72,980
Recreation USA
Location: South Myrtle Beach, SC
Stock# 15669
Location: South Myrtle Beach, SC
Stock# 15669
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2026 3990FL Specifications
Sleeps 8
Slides 5
Length 43 ft 6 in
Ext Width 8 ft
Ext Height 13 ft 4 in
Hitch Weight 2825 lbs
GVWR 15375 lbs
Dry Weight 12439 lbs
Cargo Capacity 2936 lbs
Fresh Water Capacity 50 gals
Grey Water Capacity 80 gals
Black Water Capacity 50 gals
Tire Size 16"
Furnace BTU 40000 btu
Available Beds King
Refrigerator Type 12V
Refrigerator Size 17 cu ft
Cooktop Burners 3
Number of Awnings 1
LP Tank Capacity 30 lbs
Water Heater Capacity 60000 gal
Water Heater Type On Demand Tankless
AC BTU 30000 btu
TV Info LR 50" Flat Screen TV
Awning Info 20' Electric w/LED Light Strip
Axle Count 2
Washer/Dryer Available Yes
Number of LP Tanks 2
Shower Type Shower w/Seat
Electrical Service 50 amp
VIN 4X4FSES25TJ054936
Fifth Wheel Inspection Checklist - Click to Learn More
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