🏷️ Basic Information Identification Make: GMC Model: K3500 Year: 1990 Generation Platform Code: GMT400 (Early) 👋 Introduction Market Position Target Audience: DIY mechanics, fleet maintenance, professional repair shops seeking factory data Competitive Analysis Advantage Over Print: Instant access, searchability, ease of navigation, multimedia potential (though not explicitly stated, common in modern digital manuals) Key Features Data Source: Licensed from OE (Original Equipment) materials by RepairSurge Convenience: Accessible anytime, anywhere with internet connectivity Cost Effectiveness: Significant savings compared to traditional printed manuals or dealership labor 📋 Manual Details Coverage Areas Primary Coverage: 1990 GMC K3500 Secondary Coverage: General GMC C/K series trucks of the era with similar components Page Count Estimated Pages: Extensive (typical for OE service manuals, often 1500+ pages when combined) Manual Type Type: Official Service and Repair Manual (Software) Language Language: English Format Format: Online/Digital Access (via web browser) Access Duration: 1 Year (with discounts for renewal) 📖 Manual Coverage Systems Covered Engine Mechanical: Complete overhaul, component diagnosis, timing, lubrication, cooling Engine Performance: Fuel delivery, ignition system, emissions controls, diagnostics Transmission Drivetrain: Manual and automatic transmission repair, transfer case, axles, driveshafts, differentials Suspension Steering: Front and rear suspension components, steering gear, power steering system, alignment specifications Brakes: Front and rear brake systems (disc/drum), ABS (if equipped), hydraulic system, parking brake Electrical System: Battery, charging system, starting system, lighting, instrumentation, power accessories, wiring diagrams HVAC: Heating, ventilation, and air conditioning system diagnosis and repair Body Chassis: Body panels, doors, glass, interior trim, chassis components, corrosion protection Diagnostic Troubleshooting: Systematic diagnostic procedures, fault code interpretation (OBD-I) Procedures Included Maintenance: Oil changes, filter replacements, fluid checks and top-offs, lubrication, inspections Repair: Component removal, installation, and overhaul for all major systems Troubleshooting: Step-by-step guides for diagnosing common and uncommon problems Specifications: Torque values, clearances, fluid capacities, pressures, electrical specifications Wiring Diagrams: Detailed electrical schematics for all vehicle systems Technical Depth Depth: Factory-level detail, suitable for professional technicians and advanced DIYers 📊 Manual Specifications File Format Platform Compatibility: PC, Laptop, Smartphone, Tablet (requires internet connection and web browser) Print Quality Digital Quality: High-resolution digital rendering of OE materials Binding Type Binding: N/A (Digital Format) Paper Type Paper Type: N/A (Digital Format) ⚙️ Engine Specifications Primary Engine Engine Options: 4.3L V6 (VIN Z), 5.7L V8 (VIN R), 7.4L V8 (VIN N) Performance 4.3L V6 Hp: Approx. 160-200 hp (depending on specific configuration) 5.7L V8 Hp: Approx. 200-230 hp (depending on specific configuration) 7.4L V8 Hp: Approx. 230-255 hp (depending on specific configuration) Fuel System Fuel Injection: Throttle Body Injection (TBI) or Multi-Port Fuel Injection (MPFI) depending on engine and emissions calibration Fuel Type: Unleaded Gasoline 🔧 Transmission Standard Transmission Availability: Likely available for some configurations, though less common in K3500 heavy-duty models Optional Transmission Automatic Options: TH400 (3L80), 4L60, 4L80E (for heavy-duty applications) Features Drivetrain: 4x4 (Four-Wheel Drive) standard on K-series trucks 📐 Dimensions Exterior Body Styles: Regular Cab, Extended Cab (with various bed lengths: 6.5 ft, 8 ft) Weights Gvwr: Varies significantly by configuration, but typically 8,600 lbs to over 10,000 lbs for K3500 models 🛡️ Safety Features Ratings NHTSA Ratings: Not directly available for this era in modern standardized formats. Refer to specific crash test data if available. Active Features ABS: Anti-lock Braking System (optional on some models, standard on rear-wheel ABS for many) Passive Features Seat Belts: Three-point lap and shoulder belts 💡 Technology Features Infotainment Audio System: Factory AM/FM stereo with cassette player, optional CD player Driver Assistance Cruise Control: Available as an option Connectivity Bluetooth Usb: Not available from factory; aftermarket solutions required. 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 3,000-5,000 miles or 3-6 months, depending on driving conditions and oil type used. Refer to specific manual recommendations. Transmission Fluid Interval: Check every 15,000 miles, change/flush every 30,000-60,000 miles depending on usage and fluid type. Refer to specific manual. Coolant Interval: Typically every 30,000-50,000 miles for traditional coolant. Extended life coolants may have longer intervals. Refer to specific manual. Fluid Specifications Engine Oil Viscosity: Commonly 5W-30 or 10W-30 for gasoline engines (refer to manual for exact specification and temperature range) Transmission Fluid Type: Dexron-III (or equivalent) for automatic transmissions; Manual transmission fluid (MTF) specific to manual gearbox. Coolant Type: Green ethylene glycol-based coolant (traditional) or specific extended-life coolant (ELC) if upgraded. Refer to manual for correct type and mixture. Known Issues Tbi Performance: Throttle Body Injection (TBI) systems can be prone to clogging or wear, affecting idle and acceleration. Fuel Pump Reliability: In-tank fuel pumps can degrade over time, leading to hard starting or intermittent fuel delivery. Electrical Connectors: Corrosion or looseness in electrical connectors can cause intermittent failures in various systems. Exhaust Manifold Cracks: Some V8 engines of this era could experience cracked exhaust manifolds, leading to exhaust leaks and ticking noises. 📚 Vehicle History Brand Heritage Gm Truck Legacy: GMC has a long history of...