2025 Jayco Seismic 399

Used Fifth Wheel in Montclair, California, 91763

$97,999.00

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Used 2025 Jayco Seismic 399 available in Montclair, California

2025 Jayco Seismic 399 - Used Fifth Wheel For Sale by Giant RV in Montclair, California

2025 Seismic 399 by Jayco from Giant RV in Montclair, California

Unit Specs

Stock #AVA145A
Year2025
ManufacturerJayco
Make Jayco
ModelSeismic
Floorplan399
Type Fifth Wheel
ConditionUsed
Length45' 11"
VIN1UJCGSCV6S18M0180
MSRP $114,996.00
Price $97,999.00
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Water Capacity (Fresh)106 gal
Water Capacity (Black)87 gal
Water Capacity (Grey)87 gal
Slideouts3

Looking to buy a 2025 Jayco Seismic Fifth Wheel RV?

2025 Jayco Seismic 399

Unleash your inner thrill-seeker with the 2025 Jayco Seismic 399, a robust fifth wheel toy hauler built for adventure. Available at Giant RV, this Seismic 399 features a 102" wide-body steel I-beam frame, three slide-outs, and a 14,950 lb. dry weight with a 3,750 lb. payload. With a 13'6" garage and luxury amenities, it’s perfect for RV camping.

Queen Bed Slide: Front bedroom with a 60" x 80" queen bed, wardrobe, and dresser, sleeping up to 9 with convertible sofas and a loft.
Spacious Garage: 13'6" toy hauler with a party deck, convertible sofas, queen bed, and half bath for versatile use.
Modern Kitchen: Features a 16 cu. ft. 12V refrigerator, 21" oven, 30" microwave, and residential sink for gourmet meals.
Off-Grid Ready: Equipped with a 400W solar package, 6,000W Yamaha generator, and 20' power awning for camping.

Visit Giant RV to explore the 2025 Jayco Seismic 399 and kickstart your next adventure with unmatched style and versatility!

View a video of this 2025 Jayco Seismic 399 RV on YouTube!

2025 Jayco Seismic 399 Features

2025 Jayco Seismic 399 Specifications

General

MSRP

$104,655

Dimensions

Height

13' 2"

Height (interior)

8' 3"

Length

45' 11"

Width

8' 6"

Weights

Dry Weight

14,950 lbs

GVWR

20,400 lbs

Payload Capacity

5,450 lbs

Capacities

Refrigerator Capacity

17 cu ft

Sleep Capacity

Water Capacity - Black

87 gal

Water Capacity - Fresh

106 gal

Water Capacity - Grey

87 gal

Exterior

# Awnings

# Axles

# Doors

# Slides

Hitch

Fifth Wheel

Rear Opening

Ramp

Electrical

# A/C

A/C Spec

Two exterior-mounted 15,000 BTU ducted A/Cs (living room and bedroom)

*MFG Specs are for base unit. Certain options may change specifications listed. Please consult dealer for more details. Data is provided by a 3rd party. RVUSA.com cannot guarantee the accuracy of the data presented.