2016 Jayco Seneca 37FS Super C — Freightliner/Cummins Diesel Bunkhouse — Meet Luna

If you’ve been looking for a Seneca 37FS, you already know why this floorplan is special. If you haven’t, Luna is the kind of motorhome that can ruin you for ordinary Class C’s.

Meet Luna, our 2016 Jayco Seneca 37FS Super C.

She combines a Freightliner Business Class M2 chassis, Cummins diesel power, Allison transmission, air suspension and air brakes with one of Jayco’s best family-friendly layouts: king bed, dedicated bunks, full cab-over bunk and two large slideouts.

But the real reason to look closely at this particular Seneca isn’t simply the equipment list.

It’s what has already been taken care of.

In June 2026, we took Luna to the Freightliner dealer for service and told them to take care of every repair they recommended. Nothing major was found, but we authorized everything they suggested and spent approximately $2,800 getting her ready for her next chapter.

During our ownership we have also replaced or addressed many of the items an RV buyer worries about inheriting:

• Tankless water heater

• Rear air conditioner

• Rear slide mechanism

• House batteries

• Slideout covers/toppers

• Tires

• Windshield

• Mud-flap frame

In other words, this is not a motorhome we stopped maintaining because we decided to sell it.

We maintained Luna for ourselves. Now someone else gets the benefit.

THE SUPER C PLATFORM

Luna is built on the Freightliner Business Class M2 chassis with a 28,000-lb GVWR and 33,000-lb GCWR.

Power comes from the proven Cummins ISB 6.7L diesel producing 340 HP, paired with an Allison 2500 MH automatic transmission.

The driving package includes:

• JRide Premium

• Rear air suspension

• Full air brakes

• Bilstein 60mm shocks

• Front sway bar

• Driver and passenger air-ride seats

• Engine exhaust brake

• Backup and side-view cameras with monitor

• Heated, remote-control side mirrors

• Cruise control

• Auxiliary start

• Alcoa aluminum wheels

• 74-gallon diesel fuel tank

• Factory 10,000-lb-rated hitch with 7-pin connector

We towed a 2004 GMC Yukon behind Luna. The separate towing setup we used may also be available if the buyer is interested.

THE 37FS BUNKHOUSE FLOORPLAN

This is where the 37FS really shines.

At approximately 40 feet with two slideouts, Luna gives you genuine living space without giving up the separate sleeping areas that make long trips with family or guests so much easier.

You get:

• Rear king-size bed

• Dedicated bunk beds

• Full cab-over bunk with a 750-lb rating

• Bunks rated at 300 lbs

• Dream Dinette

• Generous interior and under-bed storage

• Solid hardwood Honey Cherry cabinetry

• Solid-surface countertops

• Decorative backsplash

• Tile-style flooring

• LED interior lighting

• Padded vinyl ceiling

The layout works incredibly well for families, grandparents traveling with grandkids, groups of friends, or even a couple who simply wants extra sleeping and storage space without converting the main living area every night.

BUILT FOR REAL TRAVEL

Luna is equipped for much more than a weekend at a full-hookup campground.

She has an Onan 8,000-watt Quiet Diesel generator with automatic generator start, along with:

• 50-amp electrical service

• Electric power-cord reel

• 1,800-watt pure sine-wave inverter

• Two 15,000-BTU air conditioners with heat pumps

• 34,000-BTU furnace

• Tankless water heater

• Hydraulic automatic leveling jacks

• Four-house-battery slideout tray

• 56-lb propane tank

• Black-tank flush

• Outside shower

• Thetford Sani-Con Turbo macerator system

• LP quick-connect

• Electric patio awning with LED lighting

• Slideout awning toppers

Pull in, level up, put out the slides and awning, and make yourself at home.

KITCHEN & LIVING

The kitchen includes a 12-cubic-foot refrigerator with icemaker, convection microwave and two-burner induction cooktop, along with solid-surface countertops, water filtration and plenty of hardwood cabinetry.

Entertainment includes:

• Blu-ray system with HDMI connections to the televisions

• Bedroom LED HDTV

• Exterior entertainment center

• Exterior 39-inch TV

• Exterior speakers

• Winegard in-motion satellite dish

• Cable TV hookup

The exterior is finished in Jayco’s Sunset full-body paint with high-gloss Gelcoat construction, a one-piece fiberglass cap, Diamond Shield protection, dual-pane tinted safety-glass windows and frameless styling.

There is also keyless-entry touchpad locking, an electric entrance step and roof ladder.

WHY WE’RE SELLING

We bought Luna on July 9, 2021, and she has given us exactly what we hoped for.

Together we’ve traveled through Texas, New Mexico, Colorado, Nevada, Arizona, South Dakota, Wyoming, California, Oregon, Idaho and Washington.

We’ve loved the miles, the places we’ve seen and the memories we’ve made.

Now we’re moving on to a completely different dream: owning a sailboat in the San Juan Islands.

That is why Luna is for sale.

She isn’t being sold because we stopped enjoying her, and we didn’t quit maintaining her when we decided to move on. We serviced her, repaired what needed repairing and prepared her for somebody else to take the wheel.

Luna is ready for her next adventure.

If you’ve been searching for a Jayco Seneca 37FS bunkhouse Super C, come take a serious look at this one.

There are plenty of used RVs for sale.

There’s only one Luna.