Front bedroom, rear living area, bunk beds, mid bunk
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2021 Grand Design Solitude 378MBS
UsedStock #354715
Listing price
2021 Solitude 378MBS
Other floor plans with a similar body style, feature mix, and price range, prioritizing other manufacturers and brands.
What makes the 378MBS interesting is its layout logic: the living room lives in the rear slide, giving it a true room-like feel, while the east/west bed up front stays well away from the noise. The mid-bunk section is legitimately versatile. Owners have used it as an office, guest space, or actual bunk room depending on the trip. Grand Design builds the Solitude line with thicker walls and more insulation than most competitors, and the 378MBS adds CRE 3000 suspension and auto-leveling to help manage what is a substantial rig to tow. A kitchen island, desk, fireplace, and washer/dryer prep mean this one is set up for extended stays, not just weekends.
Length
40 ft
Dry weight
14,344 lbs
GVWR
16,800 lbs
Sleeps
7
Many factors play into a unit's listing price and what you should pay. This guide provides a ballpark estimate, but it does not factor in your exact scenario or how different listings are equipped.
$38,995 – $85,399
This unit is ranked 1 of 17 by asking price in this group.
The listing price on this unit has changed 2 times.
See the complete price timeline and the rest of this unit's pricing insights.
General RV
Fort Pierce, FL
Sells faster than 89% of US RV dealers
Compared with 1,115 dealers nationwide
Experience luxury on the road with the 2021 Grand Design Solitude 378MBS. This remarkable fifth wheel combines comfort and functionality, offering a spacious retreat with its 40-foot length and four slide-outs. The rear living area is a haven for relaxation, featuring theater seating and a tri-fold sofa, perfect for unwinding after a day of adventure. The entertainment center, complete with a telescoping TV and fireplace, adds a touch of homey warmth, making it an ideal spot for family movie nights.
The center kitchen is a chef's delight, equipped with a full-size refrigerator and a 24-inch residential oven. Whether you're whipping up a quick snack or preparing a gourmet meal, you'll find everything you need at your fingertips. The mid-bunk room provides additional sleeping space with a fold-down bunk and tri-fold sofa, making it perfect for families or guests. The master suite offers a restful escape with a queen bed, and there's even an option for a king bed if you desire more space. Enjoy the convenience of washer/dryer prep, ensuring you're always ready for the next adventure.
With a generous 31-foot powered retractable awning, you can extend your living space outdoors, creating the perfect setting for alfresco dining or simply enjoying the scenery. The Solitude 378MBS is designed to make every journey memorable, offering ample storage, modern amenities, and a welcoming atmosphere. For more details or to see this beauty in person, visit your nearest General RV dealership location.
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