| 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.
Step into the world of refined RV travel with the 2025 Forest River Sierra 3990FL—a luxury fifth-wheel that combines elegance, comfort, and functionality for an unparalleled on-the-road experience. Whether you're a couple see...