2025 Forest River Sierra 4003MB

The 2025 Forest River Sierra 4003MB is a Towable designed for full-time living, giving traveling households a spacious retreat with a center-bedroom floorplan, loft, bunk bed, king-size bed, and sleeping capacity for 9. Forest River Sierra offers 4 slideouts, 2 recliners, 2 sofas, and a full-size refrigerator for comfortable extended stays. Its 513-inch length, 15,500-pound GVWR, 50-gallon fresh water tank, aluminum wheels, fiberglass sidewalls, JBL Bluetooth® audio, and power retractable awning support confident travel and relaxing campsite living. View the Forest River Sierra at Giant RV.