🏷️ Basic Information Identification Make: GMC Model: K3500 Year: 1999 Generation Generation Designation: Third Generation (GMT400) Codes Platform Code: GMT400 👋 Introduction Market Position Segment: Heavy-Duty Pickup Truck Target Audience: DIY mechanics, fleet maintenance, owners seeking in-depth repair knowledge. Competitive Analysis Competitors: Ford F-Series Super Duty, Dodge Ram 2500/3500. Differentiation: Focus on factory-derived, licensed OE information for accuracy and completeness. Key Features Licensed Content: Information derived from OE (Original Equipment) materials. Convenience: Instant online access, accessible from multiple devices, eliminating the need for physical manuals. Cost Effectiveness: More affordable than traditional printed manuals and professional repair services. Accuracy: Licensed OE data ensures the highest level of accuracy for repairs and diagnostics. 📋 Manual Details Coverage Areas Diagnostic Coverage: Extensive, including troubleshooting charts and diagnostic procedures. Mechanical Coverage: Comprehensive, covering all major mechanical systems. Electrical Coverage: Detailed, including wiring diagrams and component location. Body And Frame Coverage: Includes repair procedures for body panels, chassis, and frame. Page Count Estimated Page Count: Over 2000 (typical for comprehensive service manuals of this era, though the digital format may vary in presentation). Manual Type Type: Service and Repair Manual (Software) Language Language: English Format Access Format: Online Access via Web Browser Compatibility: PC, Laptop, Smartphone, Tablet Subscription Period: 1 Year Access 📖 Manual Coverage Systems Covered Engine Management: Detailed diagnostics, repair, and overhaul for V8 and V6 gasoline engines. Fuel System: Injection system diagnosis and repair, fuel pump, injectors, pressure regulator. Cooling System: Radiator, water pump, thermostat, fan clutch, heater core replacement. Exhaust System: Catalytic converter, muffler, exhaust pipes, oxygen sensors. Drivetrain: Front and rear axle service, transfer case (4WD models), driveshafts, U-joints. Suspension: Front independent suspension (torsion bar), rear leaf springs, shocks, control arms. Steering: Power steering pump, gearbox, tie rods, steering linkage. Brakes: Front disc brakes, rear drum brakes (or disc brakes on some models), ABS system diagnosis and repair. Electrical System: Battery, alternator, starter, ignition system, lighting, power windows, locks, mirrors. HVAC: Air conditioning compressor, refrigerant system, heater core, blower motor, climate controls. Body And Frame: Body panel removal and installation, door mechanisms, glass replacement, chassis and frame inspection. Procedures Included Maintenance: Scheduled maintenance, oil changes, filter replacements, fluid checks, lubrication. Troubleshooting: Systematic diagnostic procedures for common and uncommon faults. Repair: Detailed step-by-step repair instructions for all major components and systems. Rebuilds: Engine and transmission rebuild procedures, including specifications and clearances. Component Replacement: Removal and installation guides for virtually every component. Diagnostic Codes: OBD-II diagnostic trouble code (DTC) definitions and interpretation. Technical Depth Depth: Comprehensive, from basic maintenance to complex diagnostics and component overhauls. Diagnostic Tools: Specifies required diagnostic tools and equipment. Torque Specifications: Precise torque values for all critical fasteners. Wiring Diagrams: Detailed, color-coded wiring schematics for all vehicle circuits. Special Tools: Identification and usage instructions for specialized tools required for certain procedures. 📊 Manual Specifications File Format File Type: Proprietary Software/Web-Based Platform Print Quality Print Quality: N/A (Digital Format) Binding Type Binding: N/A (Digital Format) Paper Type Paper: N/A (Digital Format) ⚙️ Engine Specifications Primary Engine Engine Option 1: 5.0L V8 (305 ci) Vortec 5000 Engine Option 1 Power: Approx. 230 hp @ 4600 rpm Engine Option 1 Torque: Approx. 285 lb-ft @ 3200 rpm Engine Option 2: 5.7L V8 (350 ci) Vortec 5700 Engine Option 2 Power: Approx. 255 hp @ 4600 rpm Engine Option 2 Torque: Approx. 330 lb-ft @ 3200 rpm Engine Option 3: 7.4L V8 (454 ci) Vortec 7400 (optional) Engine Option 3 Power: Approx. 300 hp @ 4000 rpm Engine Option 3 Torque: Approx. 410 lb-ft @ 3200 rpm Performance Induction Type: Multi-port Fuel Injection (MPFI) Fuel System Fuel Type: Unleaded Gasoline 🔧 Transmission Standard Transmission Option 1: 4-Speed Automatic (4L80-E) Optional Transmission Option 2: 5-Speed Manual (NV4500 HD) (less common on K3500, but available) Features Drive System: RWD (Rear-Wheel Drive) or 4WD (Four-Wheel Drive) 📐 Dimensions Exterior Body Styles: Regular Cab, Extended Cab (Crew Cab became more common in later years of GMT400). Wheelbase Options: Multiple, including 130.0 inches (Regular Cab) and 158.0 inches (Long Bed Regular Cab/Extended Cab). Weights Gvwr: Exceeds 10,000 lbs (Class 3 designation), allowing for significant payload and towing capacity. 🛡️ Safety Features Ratings NHTSA Ratings: Specific NHTSA ratings for 1999 K3500 are not readily available as separate model-year data, but the GMT400 platform generally performed moderately in crash tests of its era. Active Features ABS: Anti-lock Braking System (ABS) typically standard on K3500 models. Passive Features Airbags: Driver-side airbag standard; passenger airbag optional on some configurations. 💡 Technology Features Infotainment Radio Options: AM/FM stereo, cassette player, CD player (optional). Speaker System: Various speaker configurations available, typically 4-6 speakers. Driver Assistance Cruise Control: Standard on most K3500 models. Connectivity OBD Ii Port: Standard OBD-II diagnostic port for emissions and engine fault code retrieval. 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 3,000-7,500 miles depending on usage and oil...