GMC Sierra Ambulance
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GMC Sierra Ambulance

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GMC Sierra 3500 HD 4WD Heavy-Duty Box Ambulance

Heavy-Duty American 4×4 Ambulance Unit — High-Cube GRP Composite Body (3m Box Length) Built on GMC Sierra 3500 HD Chassis Cab[cite: 325, 328, 329, 340]

🌟 Core Platform & Operational Highlights

  • Powerful American V8 Engine: 6.6L V8 SIDI Gasoline engine delivering 401 HP paired with a 10-speed automatic transmission[cite: 325, 326].
  • Heavy-Duty 4WD Performance: Equipped with a 2-speed Autotrac transfer case, auto-locking rear differential, skid plate protection, and 14,000 lbs (6,350 kg) GVWR rating[cite: 325, 326, 327].
  • High-Performance Composite Body (GRP): Sandwich panel construction featuring 1.5mm GRP skins, 30–100mm XPS insulation core, and 6mm poplar plywood backing[cite: 330].
  • Dual Stretcher Patient Interior: Generous 3-meter box length and 2.0-meter internal height engineered to comfortably house 2 stretchers[cite: 329, 333, 340].
  • Advanced Electrical & Power Subsystems: Dual alternators (170A + 220A), 700 CCA auxiliary battery, 300W pure sine wave inverter, and external 230V shore power input grid[cite: 327, 335, 336].

⚙️ 1. Drivetrain, Chassis & Mechanical Performance

Engineering ParameterTechnical Specification & Values
Base Chassis PlatformGMC Sierra 3500 HD Chassis Cab (Regular Cab, Long Wheelbase 169.4″ / 4,303 mm)[cite: 325, 328]
Engine & Horsepower6.6L V8 SIDI Gasoline Engine (401 HP Output)[cite: 325, 326]
Transmission & Transfer Case10-Speed Automatic Transmission with 2-Speed Autotrac Transfer Case (4WD)[cite: 325, 326]
Differential & Axle Ratio3.73 Axle Ratio with Auto-Locking Rear Differential[cite: 326]
Gross Vehicle Weight Rating (GVWR)14,000 lbs (6,350 kg) Heavy-Duty Rating[cite: 326]
Fuel Tank & ProtectionDual Fuel Tank System (63.5 Gallons total capacity) + Underbody Skid Plates[cite: 326, 327]
Dimensions (Chassis Cab & Box)Overall Length: 6,759 mm | Overall Height: 2,055 mm (Chassis) / 2.0 m (Body) | Box Length: 3.0 m | Track Width: Front 1,731 mm / Rear DRW 2,438 mm[cite: 328, 329]

🚑 2. Patient Compartment Architecture & Modular Box Fit-Out

Structural ComponentMaterial, Build Standard & Engineering Detail
Modular Body ShellHigh-performance GRP (CTP) Composite Panels (1.5+1.5mm GRP skins, 30-100mm XPS insulation core, 6mm Poplar Plywood core)[cite: 330]
Subfloor & Floor FinishProfessional antibacterial, non-porous Epoxy floor coating (slip-resistant, antistatic, easy to clean & sanitize)[cite: 332]
Medical Cabinetry SystemYupseni PVC Foam Board Medical Cabinets (sterile, non-porous surface, vibration-absorbing, lightweight expanded PVC)[cite: 331]
Internal Cabin LayoutDual Stretcher capacity layout with central aisle and head-of-stretcher seats[cite: 333, 337]
Cab Interior & Seating40/20/40 Split Bench, Jet Black cloth trim, power adjustable driver seat, rubberized vinyl floor, and keyless entry & start[cite: 327]
Rear Access StepHeavy-duty integrated pull-down rear step platform for stretcher loading[cite: 337]

🔌 3. Electrical Systems, Climate Control & Emergency Hardware

System Sub-UnitTechnical Configuration
Power Generation & BatteryDual Alternators (170A + 220A = 390A Total) + 700 CCA Auxiliary battery unit[cite: 327]
Inverter & Shoreline InputGerman King 300W/600W Pure Sine Wave Power Inverter (12V DC to 220V/240V AC) + External 230V Shore Power Grid input (with 2m cable)[cite: 335, 336]
Control Module & Power OutletsDigital touchscreen Ambulance Control Module panel, internal 230V power outlets, and 12V DC sockets[cite: 327, 334]
HVAC & Auxiliary Heating4-outlet air conditioning blowing system + Webasto auxiliary heating unit + roof-type ventilation fan[cite: 334, 339]
Emergency Warning Systems360° warning lights system, roof lightbar with audible siren, Public Address (P.A.) microphone & speaker system, grill & side LEDs, and beacon lamps[cite: 338]
Interior Ceiling LightingMultiple 12V 18W high-efficiency LED ceiling lights + examination spotlights[cite: 337]

🩺 4. Medical Equipment & Dual Stretcher ALS Matrix

Equipment DescriptionBrand / SpecificationOperational Capabilities
Main Stretcher AssembliesDual Main Stretcher Grid2x Heavy-duty roll-in main loading stretchers with floor locking rails, adjustable backrests, and side rails[cite: 333, 337]
Auxiliary StretchersHeavy-Duty ALS KitFoldable stair chair stretcher, aluminum break-apart scoop stretcher, and vacuum mattress unit
Defibrillator & Vital MonitorPortable Biphasic MonitorDefibrillator unit with multiparameter ECG, SpO2, NIBP, and external cardiac pacing capability
Transport VentilatorICU Transport VentilatorPortable emergency ventilator with wall mounting bracket, circuit hoses, and ventilation mask
Suction & Aspirator UnitHigh-Vacuum AspiratorHeavy-duty portable electric suction unit with wall charger cradle and canister assembly
Central Oxygen SystemDual Tank Vault + OutletsDual steel oxygen cylinder compartment, pressure regulators, wall flowmeters, and quick-connect sockets[cite: 334]
Immobilization & First AidTrauma & Splint SetHDPE spine board, KED extrication device, limb splint sets, cervical collars, and emergency resuscitation bag

* Technical specifications are based on the GMC Sierra 3500 HD Chassis Cab (25-SEI-351) 4WD Heavy-Duty Box Ambulance technical specification document[cite: 325, 328].

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