Momentum 388M | Grand Design

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Momentum 388M

Dealer Stock Only
Momentum 388M G1 Floorplan


14300 lbs
Hitch Weight1
2800 lbs
18500 lbs
41' 9"
13' 5"
Axle Rating
3 x 7000
Fresh Water Capacity4
117 / 157***
Grey Water Capacity
78 Gal
Waste Water Capacity
78 Gal
Water Heater
Fuel Capacity
60 Gal
LP Capacity
60 lbs
35000 BTU
5000 BTU
Frame Size
12" I-Beam
R-Value (Main Floor)3
R-Value (Garage Floor)3
R-Value (Walls)
R-Value (Roof)3
Aluminum Cage
Awning Length
18' (Opt 12')
Std. Bed Dimensions
60" X 80" Queen (Opt. King)



Sofa w/Headrest & Removable Swivel Tables (Includes Heat, Massage & LED Lighting Package(S)
Central Vacuum System w/ Tools and Dust Pan(S)
Super Sofa Upgrade - IPO Theatre Seats & Dinette (395MS, 397TH, 399TH only)(O)
Plywood Drawer Bottoms(S)
Interior Color Changing LED Accent Lighting(S)
Raised Panel Hardwood Cabinet Doors w/Hidden Hinges(S)


6-Point Hydraulic Leveling System (S)
Dual Pane Window Upgrade(O)
Back-Up Camera (Camera Prep Standard) (O)
Slide-Out Awning Toppers (O)
Keyed Alike™ Ramp Door Latches(S)
2nd Patio Awning w/ LED Lights (S)
3rd Awning w/ LED Lights (Main Slide - 395MS and 397TH)(M)
Front and Back Under Unit Blue LED Light Kit(M)
High-Gloss Gel Coat Exterior Sidewalls(S)
Full Body Paint (O)
Under Mount 17" Spare Tire(S)
Door Side Exterior Spray Port(S)


Microwave (S)
18 Cu. Ft. Refrigerator (S)
30" Stainless Steel Microwave w/ Ext. Vent(S)
Residential Kitchen Faucet(S)
Window Behind Range (349M, 351M, 381M, 398M, 397TH, 399TH)(S)
Kitchen Barstools w/ Extended Countertops (349M, 351M, 381M, 398M, 397TH, 399TH only)(S)


One-Piece Fiberglass Shower w/Glass Door(S)
Skylight Above Shower(S)
Porcelain Toilet(S)
Medicine Cabinet w/Mirrored Door(S)


MORryde® CRE3000 Suspension System(S)
Upgraded Axle Hangers(S)
Straight Frame Chassis (12")(S)


Residential Style Headboard(S)
Under Bed Storage Area (N/A 376THS)(S)
Individually Switched Reading Lights Over Bed(S)
Bedside 110-Volt Outlets(S)
60" X 80" Queen Bed(S)
King Bed Upgrade(O)


Rear Cargo Loading & Backup LED Lights(S)
Quick Set Ramp Door Patio System w/ Power Awning (N/A 376THS)(O)
3-Season Garage Wall (NA w/ Pull Down Garage Screen Wall) (N/A 376THS)(O)
Happi-Jac Electric Bunk System w/Folding Sofas (N/A 376THS)(O)
Patio Steps (N/A 376THS)(O)

Audio & Video

Rockford Fosgate Speaker Package w/12" Sub and 300W Amp(O)
No-Crank Digital TV Antenna w/Booster(S)
Satellite/Solar Roof Access Channel(S)
TV Prep in Garage (NA 376THS)(S)
Exterior Entertainment Center w/LED TV(O)


OneControl™ 7" Touchscreen Control Panel w/App Controls and Redundant Slide Switches(S)
Generator Prep(S)
Solar Prep (10 gauge wiring with universal MC4 connectors)(S)
Solitude Solar System (300w Solar Panel, Controller, 2000w Inverter)(O)

HVAC & Plumbing

Middle/Main A/C(S)
2nd A/C - Bedroom (M)
12v High Power Fan (Kitchen)(M)
12v High Power Fan - Garage (N/A with 3rd AC Option)(O)
12V Tank Heaters (All Tanks)(S)
35k BTU High Capacity Furnace(S)
Fireplace w/ 5,000 BTU Electric Heater(S)



  • Satellite TV Prep (All TV Locations)
  • Aluminum Quad Entry Steps - Garage Entry (N/A 376THS)
  • 7,000 lb. Axles w/Self Adjusting Brakes, Wet Bolts and Bronze Bushings
  • 17” Aluminum Wheels (120PSI Rated)
  • Cooper Tires® 17.5" All-Steel H-Rated Tires
  • Slam-Latch Baggage Doors
  • Frameless Tinted Windows
  • Aluminum Quad Entry Steps - Main Entry
  • Exterior Security Lights
  • Power Patio Awning w/LED Lighting
  • Folding Roof Ladder
  • White Gel Coat Fiberglass Front Cap
  • 12V Battery Disconnect
  • All-In-One Exterior Utility Center
  • 50 Amp Service
  • Converter
  • Enclosed Fuel Station w/ Dual Fuel Tank (Single Tank 376THS)
  • Partial Paint Gel Coat Fiberglass Front Cap
  • Solid Step Quad Entry Step - Main Entry

  • 32" Class LED TV in Garage (397TH and 399TH only)
  • Protective Diamond Plate on Garage Sidewalls
  • 2,500 lb. Rated Flush-Mount Tie-Downs
  • Ram-Air Garage Vents Both Sides(N/A 376THS)
  • Tuff-Ply Gas and Oil Resistant Garage Flooring
  • Fast Ramp Rear Ramp Door(N/A 376THS)
  • Triple Insulated Garage Floor (N/A 376THS)

  • 49" Class LED TV in Living Area
  • Stereo Entertainment System w/Bluetooth and App Based Controls in Living Area
  • Washer/Dryer Prep
  • 12 Gallon Gas/Electric Water Heater
  • Roller Shade Window Coverings (Main Living Area and Bedroom)
  • Recessed LED Puck Lighting
  • Solid Surface Countertops w/ Sink Covers
  • Stainless Steel Undermount Kitchen Sink
  • Chef Inspired Range & Oven w/ Cover
  • Kitchen Pantry w/ LED Light Strip
  • Garage Control Panel (N/A 376THS)

  • R-Value Equivalent (R-40 Roof / R-45 Floor / R-11 Sidewalls / R-40 Garage Floor / R-24 Slideroom Floor)
  • Fully Enclosed and Heated, Underbelly and Storage Area
  • Enclosed and Heated Low Point Drains
  • Engineered Underbelly Airflow Heat Paths
  • Stealth AC System w/ Insulated A/C Ducts
  • Attic Vent
  • Plumbing Line Insulation Barrier
  • Photo Gallery