| Year | 2025 |
| Manufacturer | FOREST RIVER |
| Brand | SIERRA |
| Model | 3990FL |
| Type | Fifth Wheel |
| Class | |
| Fuel Type | |
| Status | New |
| Stock # | 25FR002 |
| Financing Available | |
| Warranty Available | |
| Odometer | |
| VIN | |
| Chassis | |
| Engine | |
| Transmission | |
| Suspension | N/A |
| Leveling | N/A |
| Exterior Length | 43.5 ft. |
| Dry Weight | 12439 lbs. |
| Sleeping Capacity | 8 person(s) |
| Interior Colour | N/A |
| Exterior Colour | Fiberglass |
| Slideouts | 5 |
Disclaimer: Product information, pricing and photos are as accurate as possible and are subject to change without notice.
Introducing the 2025 Forest River Sierra 3990FL — a luxury fifth-wheel that redefines what it means to travel in comfort and style. With its expansive size and exceptional design, this model is perfect for families, couples, or anyone looking to enjoy the freedom of the open road without sacrific...