🏷️ Basic Information Identification Make: GMC Model: K3500 Year: 1990 Codes Chassis Code: GMT400 👋 Introduction Market Position Positioning: A comprehensive digital service and repair manual for owners and enthusiasts of the 1990 GMC K3500, offering a convenient and cost-effective alternative to traditional printed manuals or costly professional repairs. Competitive Analysis Comparison: Outperforms outdated printed manuals in terms of accessibility, searchability, and cost-effectiveness. Provides licensed OE material, ensuring accuracy and completeness not always found in generic third-party manuals. Key Features Convenience: Instant online access, compatible with multiple devices, year-long access with renewal options. Content Quality: Officially licensed, factory-derived information for high accuracy and reliability. 📋 Manual Details Coverage Areas Primary Coverage: Factory-derived service and repair information Page Count Estimated Pages: Extensive (Digital format provides access to all content) Manual Type Type: Service and Repair Manual Software Language Language: English Format Format: Online Software / Digital Access 📖 Manual Coverage Systems Covered Powertrain: Engine (V8, V6, Diesel options), Transmission (Automatic, Manual), Drivetrain (4WD, Rear Wheel Drive), Exhaust System, Fuel System Chassis: Suspension (Front & Rear), Steering System, Brakes (Hydraulic, ABS), Wheels & Tires Electrical: Wiring Diagrams, Ignition System, Charging System, Starting System, Lighting, Instrumentation, Audio System, Power Accessories Body & HVAC: Body Panels, Doors, Windows, Seats, Interior Trim, Heating, Ventilation, Air Conditioning (HVAC) HVAC Details: Component identification, refrigerant service (if applicable, though R-12 was common), blower motor, heater core, AC compressor, and control systems. Steering System Details: Power steering pump, steering gear/rack, tie rods, steering column, and diagnostic procedures for play or leaks. Procedures Included Maintenance: Oil Changes, Filter Replacements, Fluid Checks & Replacements, Tune-ups, Lubrication Repair: Engine Overhaul, Transmission Repair, Brake System Overhaul, Suspension Component Replacement, Steering System Rebuild, Electrical Component Diagnosis & Replacement Troubleshooting: Diagnostic Procedures, Symptom-based Troubleshooting Guides, Fault Code Interpretation (where applicable) Specifications: Torque Specifications, Fluid Capacities, Alignment Specifications, Diagnostic Data Diagnostic Charts: Includes detailed diagnostic charts and flowcharts for troubleshooting electrical and mechanical issues. Wiring Diagrams: Comprehensive electrical wiring diagrams for all vehicle systems, crucial for electrical diagnostics and repairs. Brake Replacement: Detailed steps for brake pad and shoe replacement, rotor and drum machining or replacement, brake caliper and wheel cylinder service, and bleeding the brake system. Technical Depth Depth: Comprehensive factory-derived technical information suitable for DIY mechanics and professional technicians. Covers basic maintenance to complex component overhauls and diagnostics. Engine Rebuild Procedures: Detailed instructions for engine disassembly, inspection, measurement, and reassembly, including bearing clearances, piston ring gaps, and valve specifications. Body And Frame Repair: Information on body panel alignment, corrosion repair, door mechanisms, window regulators, and frame inspection and repair (if applicable). 📊 Manual Specifications File Format Accessibility: Web-browser accessible on PC, Laptop, Smartphone, Tablet with internet connection. Print Quality Quality: Digital - High resolution, clear diagrams and text. Binding Type Binding: N/A (Digital Access) Paper Type Paper: N/A (Digital Access) Software Features Searchability: Excellent search functionality to quickly locate specific repair procedures or technical data. ⚙️ Engine Specifications Primary Engine Engine Options: 4.3L (262 cu in) V6, 5.7L (350 cu in) V8, 7.4L (454 cu in) V8, 6.2L (379 cu in) Diesel V8 Performance Horsepower Torque: Varies by specific engine option (e.g., 5.7L V8 typically around 200-230 hp and 300-330 lb-ft torque). Detailed specs for each variant are within the manual. Fuel System Fuel Delivery: Fuel Injection (TBI or MPFI depending on engine and configuration) Ignition System Ignition Type: Distributorless Ignition System (DIS) or Distributor-based, depending on engine. Engine Displacements Displacements: 4.3L (262 cu in), 5.7L (350 cu in), 7.4L (454 cu in), 6.2L Diesel (379 cu in) Engine Features Engine Management System: ECM (Engine Control Module) or similar, controlling fuel injection, ignition timing, and idle speed. 🔧 Transmission Standard Transmission Types: 4-speed Automatic (e.g., TH400, 4L80E), 5-speed Manual (e.g., NV4500, NV5600) Optional Optional Transmissions: Availability varied by engine and configuration. Features Drivetrain Options: Rear-Wheel Drive (RWD) and Four-Wheel Drive (4WD) configurations available. Transfer Case: Manual or electric shift transfer cases for 4WD models, with detailed service procedures for their repair and maintenance. 📐 Dimensions Exterior Body Styles: Regular Cab, Extended Cab, Chassis Cab. Wheelbase: Various options available, typically 132.5 inches (Regular Cab), 150.5 inches (Extended Cab), and longer for chassis cab configurations. Cargo Bed Options: Long bed and standard bed configurations available, with detailed dimensions and tailgate service information. Weights Gvwr: Gross Vehicle Weight Rating varies significantly based on configuration, often exceeding 8,500 lbs, up to 10,000 lbs or more for heavier duty variants. Curb Weight: Varies significantly by configuration, typically ranging from 4,500 lbs to over 6,000 lbs. 🛡️ Safety Features Ratings NHTSA Ratings: NHTSA crash test data for 1990 models may be limited or not directly comparable to modern standards. Manual will detail passive safety features available at the time. Active Features Active Safety: Anti-lock Braking System (ABS) - often optional on rear wheels or 4-wheel ABS. Passive Features Passive Safety:...