Valley RV Center
Valley RV Center

2005 - GULFSTREAM CONQUEST ENDURA M6378

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Specifications

ONLY -37,832 MILES W AN 8.1 V8 ENGINE
The 2005 Gulf Stream Conquest Endura 6378 is a WORK HORSE heavy-duty "Super C" motorhome. Built on a commercial medium-duty truck chassis, it bridges the gap between a traditional Class C and a massive Class A diesel pusher, offering incredible towing capacities and a highly spacious triple-slide interior layout. 
Chassis & Mechanical Options
The 2005 Endura 6378 was built primarily on the Chevrolet/GMC Kodiak C5500 commercial chassis, offering exceptional road stability and high weight tolerances: 
  • Standard Engine: 8.1L Vortec V8 Gasoline Engine (325 HP / 460 lb-ft torque).
  • Optional Engine: 6.6L Duramax V8 Turbo Diesel (300 HP).
  • Transmission: Premium Allison 5-speed automatic transmission.
  • Towing Capacity: Up to 10,000 lbs (with a 26,000 lbs Gross Combined Weight Rating).
  • GVWR: Heavy-duty 19,500 lbs Gross Vehicle Weight Rating. 
Dimensions & Capacities
  • Exterior Length: 36 feet 6 inches.
  • Exterior Height: 12 feet (with A/C).
  • Interior Height: Nearly 7 feet (84 inches), offering significantly more vertical headroom than standard motorhomes.
  • Fresh Water Capacity: Large 100-gallon fresh water tank.
  • Fuel Capacity: Generous 80-gallon tank for long-distance cruising. 
Floorplan & Interior Features (Model 6378)
The hallmark of the 6378 floorplan is its triple-slideout, two-zone living layout that prioritizes bedroom comfort: 
  • The Master Bedroom Oasis: Unlike traditional layouts, the 6378 bedroom functions as a private daytime sitting room. It features an island queen bed, a large rear bay window, a substantial wardrobe closet, and two freestanding chairs. 
  • Flush-Floor Slides: Features Gulf Stream's trademark flush-floor slideouts, eliminating the frustrating step-up lip commonly found in mid-2000s RV slides. Slide ceilings are 6 feet tall. 
  • Main Living Area: Contains a slide-out sofa/dinette combo alongside a cab-over bunk or an optional cab-over entertainment center. 
  • Split Bathroom: Features a full-size standalone shower completely separated from the private toilet and vanity area.
Utilities & Exterior Build
  • Construction: Cradle of Strength design utilizing welded tubular aluminum framing, a seamless fiberglass roof, and vacuum-laminated sidewalls with high-density block foam insulation.
  • Electrical Service: 50-amp heavy-duty electrical service.
  • Climate Control: Dual roof-mounted air conditioners running through a specialized metal H-Ducted system for uniform cooling.
  • Generator: Standard onboard 5.5 kW generator.
  • Storage: Seamless, carpeted, galvanized steel basement storage compartments to protect cargo from rust and moisture.

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