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
Did not buy today, but I will be back! Shawn showed me what I asked to see and walked me through what might fit my needs. I am coming back when I'm ready to buy. Best prices on 2025 units. - Paul
Sale Price:
$72,980
Recreation USA
Location: South Myrtle Beach, SC
Stock# 15669
Location: South Myrtle Beach, SC
Stock# 15669
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 |
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