New 2026 Jayco Seismic 399
+39
- Sale Price: $102,479
- MSRP: $141,197
- Save: $38,718
-
46ft long
-
14,950 lbs
-
Sleeps 9
-
3 slides
-
Bath and a HalfTwo Entry/Exit Doors
399 Floorplan
Specifications
| Sleeps | 9 | Slides | 3 |
| Length | 45 ft 11 in | Ext Width | 8 ft 6 in |
| Ext Height | 13 ft 2 in | Int Height | 8 ft 3 in |
| Exterior Color | Titanium, Metallic Red, Charcoal, Metallic Copper, Metallic Blue Full Body Paint Choices | Hitch Weight | 3370 lbs |
| GVWR | 20400 lbs | Dry Weight | 14950 lbs |
| Cargo Capacity | 5450 lbs | Fresh Water Capacity | 106 gals |
| Grey Water Capacity | 87 gals | Black Water Capacity | 87 gals |
| Tire Size | 17.5" | Furnace BTU | 35000 btu |
| Generator | Yamaha 6000 Watt | Fuel Capacity | 30 gals |
| Number Of Bunks | 1 | Available Beds | Queen |
| Refrigerator Type | 12 Volt | Refrigerator Size | 17 cu ft |
| Cooktop Burners | 3 | Number of Awnings | 3 |
| Garage Size | 13 ft 6 in | LP Tank Capacity | 30 lbs |
| Water Heater Capacity | 16 gal | Water Heater Type | Gas/Electric DSI |
| AC BTU | 30000 btu | TV Info | LR 4K Smart LED HDTV |
| Awning Info | 21' Electric w/LED Lights, 11' Electric, 10' Rear | Axle Count | 3 |
| Washer/Dryer Available | Yes | Number of LP Tanks | 2 |
| Shower Type | Walk-In Shower | Electrical Service | 50 amp |
| VIN | 1UJCGSCVXT18M0149 |
Description
Jayco Seismic toy hauler 399 highlights:
- Party Deck
- Queen Bed with Convertible Sofas
- Overhead Garage Loft with Storage
- Walk-in Shower
- 60" x 80" Queen Bed
- 4K Smart LED HDTV
Get ready for outdoor adventures in this spacious toy hauler. Your guests will have the 13' 6" garage with queen bed with convertible sofa and a loft for added sleeping space, plus there is overhead storage for your things and a side man door to come and go easily. The main living area includes dual opposing slides with an L-shaped tri-fold sofa along the roadside and your dinette and refrigerator plus pantry in the curbside slide. Head up the steps to your front private bedroom with the dual entry bath accessible from the hall and inside the master bedroom. Here you will all enjoy a walk-in shower, toilet, and vanity with a sink, plus overhead storage. The bedroom features a third slide out housing a queen bed for added floor space, plus a full front walk-in closet, a dresser, and washer/dryer prep!
One look at the Seismic toy haulers by Jayco, and you'll never go back! Each model features a custom automotive-grade vinyl exterior graphics package, a painted fiberglass front cap with built-in LED lighting, and 102" wide-body structural steel I-beam construction. You'll find the pass-through storage with Slam-Latch baggage doors will make unpacking easier than ever, and the rear ramp door/patio with anti-slip, non-skid flooring will allow you to unload your toys with no trouble at all. These toy haulers feature a three seasons garage wall/doors, a 30 gallon fuel tank with a timer, and exterior marine-grade speakers to keep the party going. The Climate Shield zero degree tested weather protection includes a 35,000 BTU furnace, PEX plumbing, and a fully enclosed and heated underbelly so you can enjoy your adventures year around. And we haven't even touched on the interior luxuries you'll find, like solid hardwood cabinet doors, residential vinyl flooring made in the USA, night shades, and more!
With over 45 years as a family run business we carry great new products from brands like Jayco, Forest River, Venture RV and DRV, and Crossroads and Thor Motor Coach. Southern RV also features certified pre-owned RV's from companies like Keystone, Brinkley, Heartland, Airstream and Alliance,Tiffin and Winnebago. Come into our Cumming or Mcdonough locations and take advantage of the exceptional customer experience and marvelous pricing that has positioned Southern RV as one of the most awarded RV Dealers in the America with two RV Business Top 50 Dealer awards, three Inc. 5000 awards, as well as a Top Ten Venture RV Dealer for four years in a row.
Features
Standard Features (2026)
PLEASE NOTE: Features and options separated by type below
------------------------------------------------------------
FIFTH WHEELS
Exterior Equipment
- 102 in. wide-body structural steel I-beam construction
- Stronghold VBL™ aluminum-framed and vacuum-bond laminated gel-coated fiberglass exterior walls and slide room end walls
- Magnum Truss™ XL6™ Roof System (strongest tested roof in the industry) with Alpha roof membrane system (limited lifetime warranty)
- Painted fiberglass front cap with clear coat and built-in specialty LED lighting
- Custom automotive-grade vinyl exterior graphics package
- Climate Shield™ zero-degree tested weather protection includes:
- 35K BTU output furnace
- Double-layer fiberglass batt insulation in ceiling and floor
- Double-sided radiant barrier insulation (roof and floor)
- Fully enclosed and heated underbelly (ducted)
- NPS – Powered by Yamaha® 6,000-watt generator with built-in pure sine inverter (gas/C.A.R.B. certified)
- 6-point hydraulic auto-leveling system
- Battery disconnect switch
- Detachable shore power cord
- Dual 30 lb. propane bottles with auto regulator
- Water heater bypass
- LP quick-connect
- Exterior marine-grade speakers
- Digital TV antenna
- Folding roof ladder
- LED exterior lighting package
- JaySMART™ (Safety Markers and Reverse Travel) LED lighting (patented)
- HELIX Cooling System™ (industry exclusive) includes:
- Three exterior-mounted 13,500 BTU soft-start, high-efficiency, ducted A/Cs (living room and bedroom)
- Directional and closeable A/C vents
- Insulated dual-duct design
- Pass-through storage with Slam-latch™ baggage doors
- Under-mounted spare tire
- Fully enclosed, LED-lighted universal docking center with:
- Black tank flush
- Winterization and sanitation hookups
- Quick-connect outside shower
- Satellite prep
Interior Equipment
- Olympic king bed (359 & 413)
- Residential quilted bedspread
- Gas-strutted under-bed storage
- Washer/dryer prep
- 12V charging station
- Bathroom skylight
- Central command center with built-in tank monitoring
- Custom interior design (Dune Gray)
- LED interior lighting throughout
- LED fireplace with electric space heater (select models)
- No in-floor heat registers throughout the coach
- Vinyl flooring in slideouts (no carpet)
- Residential vinyl flooring (made in the USA)
- Hardwood safety handrail on hallway steps
- Carbon monoxide and LP detector
- 5/8 in. tongue-and-groove joined plywood main floor decking and 3/8 in. tongue-and-groove plywood roof decking
- Handcrafted and glazed doors, drawers, and trim
- Solid hardwood cabinet doors
- Residential finished dovetail-jointed drawers throughout
- Heavy-duty, 75 lb., full-extension, steel ball-bearing drawer guides
- SuperSofa™ or theater seats with heat, massage, and LED lighting (select models)
- Stain-protected fabric on all furniture
- Residential “Do it all” sink with pull-out kitchen faucet, glass rinse, and vegetable rinse
- Porcelain foot-flush toilet
- Inverter pre-wire
Customer Value Package (Mandatory)
- On-demand tankless hot water heater
- 50-amp service
- Overlander II Solar Package: 30-amp solar controller with (2) roof-mounted 200W solar panels and a 1,800W inverter
- 17 cu. ft. 12V refrigerator
- 30 in. space-saver microwave
- Residential 21 in. oven with three burners
- 4K Smart LED HDTV with fully digital HDMI® output
- Touch-screen Bluetooth® stereo with four speakers
- Electric patio awning with integrated RGB LED lights (multi-color with remote control)
- MORryde® strut-assisted fold-away entrance steps (main entrance)
- Custom black, machined aluminum rims
- Keyed-Alike™ lock system
- Bathroom power vent
- Night roller shades
- Hidden hinges and magnet door catches on cabinet doors
5 Star Handling Package (Mandatory)
- 17.5 in., 16-ply “H” rated Cooper® tires
- Dexter® axles with ABS and Tow Assist – includes Nev-R-Adjust® brakes and E-Z Lube® hubs
- MORryde® CRE-3000™ Suspension System
- Rota-Flex® king pin
- Wet bolt fasteners, bronze bushings, and 4K lb. leaf springs
- 2nd electric patio awning with integrated RGB LED lights (multi-color with remote control)
Ramp and Cargo Equipment
- 30 gal. fuel tank with timer
- Garage D-rings mounted to steel frame
- HappiJac® electric-lift queen beds/convertible sofas with folding armrests and cup holders
- Three-season removable garage wall/doors
- Tuff-ply™ rubberized garage floor liner
- Rear ramp door and patio with anti-slip, non-skid flooring
- Ramp patio kit with exterior steps
- Rear electric patio awning
- LED high-intensity ramp lights
- Ram air vents and power roof vent
Options
- Frameless, dual-pane, tinted safety-glass windows
- Outside HALO™ griddle for outside kitchens or JayPort® system (includes LP quick-connect) (select models)
- Queen residential foam-top mattress (395 & 399)
- Retractable half-bath wall in garage (395 & 399)
---------------------------------------------------------------
TRAVEL TRAILERS
Exterior Equipment
- 102 in. wide-body structural steel I-beam construction
- Magnum Truss™ XL6™ Roof System (strongest tested roof in the industry)
- Stronghold VBL™ aluminum-framed and vacuum-bonded, laminated gel coated, fiberglass exterior walls and slideroom end walls
- Painted fiberglass front cap with clear coat and built-in specialty LED lighting
- Climate Shield™ zero-degree tested weather protection:
- 35K BTU output furnace
- Double layer fiberglass batt insulation in ceiling and floor
- Double sided radiant barrier insulation (roof and floor)
- Fully enclosed and heated underbelly (ducted)
- Custom automotive-grade vinyl exterior graphics package
- Lippert Solid Step®
- Backup camera prep
- Power tongue jack
- 50-amp service
- Detachable shore power cord
- Digital TV antenna
- Satellite prep
- Black tank flush, winterization and sanitation
- Quick-connect outside shower
- Water heater bypass
- LP quick-connect
- HELIX Cooling System™ (industry exclusive):
- Jayco exclusive insulated dual duct design
- Directional and closeable A/C vents
- Slam-latch™ baggage doors
- LED exterior lighting package
Interior Equipment
- 5/8 in. tongue-and-groove joined plywood main floor decking and 3/8 in. tongue-and-groove plywood in the roof
- PEX plumbing
- Carbon monoxide and LP detector
- Central command center with built-in tank monitoring
- Inverter pre-wire
- LED fireplace with electric space heater (select models)
- LED interior lighting throughout
- Custom interior design
- Solid hardwood cabinet doors
- Handcrafted and glazed doors, drawers and trim
- Residential finished dovetail-jointed drawers throughout
- Heavy-duty, 75 lb., full-extension, steel ball-bearing drawer guides
- No in-floor heat registers throughout the coach
- Bathroom skylight
- Porcelain foot flush toilet
- Medicine cabinet with custom framed mirror
- High Rise Kitchen Faucet
- King bed
- Residential quilted bedspread
- Stain protected fabric on all furniture
- Vinyl flooring in slide outs (no carpet)
- Residential vinyl flooring (made in the USA)
- Roll down garage screen (*unless 3 season door is selected)
Customer Value Package (Mandatory)
- 60K BTU On-demand tankless hot water heater
- 12V refrigerator
- Space-saver microwave
- 13.5K BTU A/C
- 17 in. oven with 3 burners
- 4K Smart LED HDTV
- Bluetooth® stereo with 4 speakers
- Roller-shades
- Soft close hidden hinges and magnet door catches on cabinet doors
- Drop-down knife rack
- Integrated cup washer at sink
- Bathroom power vent
- Roll-away shower door
- Electric awning
- Roof ladder prep
- JayPort® 2 in. mount (for outside accessories)
- Keyed-Alike™ lock system
- (2) 20 lb. LP gas bottles with auto-regulator, ABS cover, & fill gauge
- 106 gal. fresh water capacity
- Overlander 1 Solar Package: 200W panel and 30-amp solar controller)
Ramp And Cargo Equipment (Mandatory)
- 30 gal. fuel tank with locking, enclosed pump and timer
- 5,000 lbs. Garage D-rings mounted to the steel frame
- HappiJac® electric-lift queen beds with convertible sofas
- LED high-intensity ramp lights
- Ram air vents and power roof vent
- Tuff-ply, rubberized garage floor liner
- Weather resistant rear ramp door and patio with anti-slip, non-skid flooring
5 Star Handling Package (Mandatory)
- Dexter® axles with Nev-R-Adjust® brakes and E-Z Lube® hubs
- Wet bolt fasteners, bronze bushings, and 4,000 lb. leaf springs
- CRE-3000 suspension
- 16 in. aluminum rims
- Under-mounted spare tire
Options
- 6,000W NPS inverter generator with remote start
- Second A/C
- 3-season removable garage wall
- Rear patio awning
- Slideout awning
- Overlander 2 Solar Package: (2) 200W panels, MPPT 30-amp solar controller and 1800W inverter
- Queen bed in place of king
Please see us for a complete list of features and available options!
All standard features and specifications are subject to change.
All warranty info is typically reserved for new units and is subject to specific terms and conditions. See us for more details.
Due to the current environment, our features and options are subject to change due to material availability.
Save your favorite Rvs as you browse. Begin with this one!
-
AnonymousMike Paris helped us get the perfect camper
Mike Paris was our salesmans and helped us get the perfect camper for our family! He answered our questions and helped us get pricing worked out! Great experience at southern RV! Highly recommend -
DudleyChristiana in service and Jessica with the extended warranty
Christiana in service and Jessica with the extended warranty have always went above and beyond to take care of service problems. Hunter which is a technician and just put us a new roof on has always done good work and been real friendly. When we bought it in 2017 Hunter did our walk through and presentation. -
AnonymousMark Harper is the most knowledgeable sales person
Mark Harper is the most knowledgeable sales person we've ever had the pleasure of doing business with. Ten stars!!
Loading
At Southern RV, we’re committed to giving you a clear, upfront understanding of your out-the-door cost. The listed Sale Price includes all of our cash discounts and may also includes a Finance Concession for using one of the approved lenders through our Finance Department. In addition to the above price, we have a Documentation Fee of $897 for all RV types, as well as a Dealer Prep Fee of $498 for travel trailers, $698 for fifth wheels, or $798 for motorhomes. New motorhomes are subject to a $3 Lemon Law Fee per the State of Georgia. Taxes are collected based on the location of registration. That's it! No additional freight charges to our dealership, no customer orientation charge, and none of those "ready-to-camp" add-ons like you’ll often find at chain stores!
Southern RV is not responsible for any misprints, typos, or errors found in our website pages. Any price listed excludes sales tax, registration tags, and delivery fees. Manufacturer pictures, specifications, and features may be used in place of actual units on our lot. Please contact us @770-477-0552 for availability as our inventory changes rapidly. All calculated payments are an estimate only and do not constitute a commitment that financing or a specific interest rate or term is available.
Manufacturer and/or stock photographs may be used and may not be representative of the particular unit being viewed. Where an image has a stock image indicator, please confirm specific unit details with your dealer representative.
