🏷️ Basic Information Identification Make: Chevrolet Model: K1500 Year: 1991 Codes Chassis Code: GMT400 👋 Introduction Market Position Target Audience: DIY enthusiasts, independent repair shops, fleet maintenance personnel Competitive Analysis Advantage: Licensed OE (Original Equipment) data from RepairSurge, offering accuracy and completeness superior to generic manuals. Convenience of digital access and searchability. Key Features Data Source: Officially licensed, derived from OE materials Accessibility: Accessible on PC, laptop, smartphone, tablet via web browser with internet connection Convenience: Instant download, no need for physical manuals 📋 Manual Details Coverage Areas Manual Type: Service and Repair Manual Software Language: English Format: Digital (PDF Download) Access Duration: 1 Year (with renewal options) 📖 Manual Coverage Systems Covered Engine Mechanical: Complete overhaul, troubleshooting, diagnostics, performance tuning for all gasoline engines Engine Electrical: Ignition system, fuel injection system (TBI, CPI), starting and charging system, sensors, actuators, PCM diagnostics Transmission: Automatic (TH400, 4L60, 4L60E) and manual transmissions: overhaul, diagnostics, service, fluid replacement Drivetrain: Four-wheel drive system (NP241), differentials, axle shafts, driveshafts, U-joints Suspension Steering: Front and rear suspension components (independent front suspension), steering gearbox, power steering system, alignment specifications Brakes: Front disc and rear drum brake systems, ABS (if equipped), hydraulic system diagnostics, component replacement, bleeding procedures Electrical Body: Lighting, power windows, power locks, wipers, horn, interior/exterior trim, body panel repair, chassis electrical troubleshooting HVAC: Air conditioning system, heater core, blower motor, climate controls, refrigerant handling and service Procedures Included Maintenance Schedules: Recommended service intervals for oil changes, filter replacements, fluid checks, tune-ups Troubleshooting: Diagnostic flowcharts and step-by-step guides for common and complex issues across all systems Repair Procedures: Detailed, illustrated instructions for component replacement, adjustments, and complete system overhauls Wiring Diagrams: Comprehensive electrical schematics for all vehicle systems Technical Depth Diagnostic Capabilities: Advanced diagnostics covering engine control, ABS, and other electronic systems, including component testing and signal tracing Rebuild Specifications: Torque specifications, clearance measurements, and critical data for complete engine and transmission rebuilds 📊 Manual Specifications File Format File Format: PDF Searchability: Fully searchable text content Printability: Printable pages for offline reference Print Quality Image Resolution: High-resolution diagrams and illustrations Binding Type Binding Type: N/A (Digital Download) Paper Type Paper Type: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Options: 4.3L V6 (VIN Z), 5.0L V8 (VIN H), 5.7L V8 (VIN K) Performance 4.3L Horsepower 4.3L: Approx. 160 hp @ 4000 rpm (varies slightly by application) Torque 4.3L: Approx. 230 lb-ft @ 2000 rpm (varies slightly by application) Performance 5.0L Horsepower 5.0L: Approx. 175 hp @ 4000 rpm Torque 5.0L: Approx. 260 lb-ft @ 2400 rpm Performance 5.7L Horsepower 5.7L: Approx. 210 hp @ 4000 rpm Torque 5.7L: Approx. 300 lb-ft @ 2400 rpm Fuel System Fuel Delivery 4.3L 5.0L: Throttle Body Injection (TBI) Fuel Delivery 5.7L: Central Port Injection (CPI) - also known as CSFI (Central Sequential Fuel Injection) Recommended Fuel: Unleaded Gasoline (Octane rating as per owner's manual) 🔧 Transmission Standard Standard Transmission: 4-speed automatic (e.g., 4L60, 4L60E) Optional Optional Transmission: 5-speed manual (NV3500) available on some models Features AWD Transfer Case: New Process NP241 (part-time 4WD) 📐 Dimensions Exterior Body Styles: 2-door Regular Cab, 4-door Extended/Crew Cab Wheelbase Regular Cab: 118.0 inches Wheelbase Extended Cab: 131.5 inches Weights Curb Weight Range: Approx. 4,000 - 5,000 lbs (depending on configuration) 🛡️ Safety Features Ratings NHTSA Ratings: N/A (pre-dates standardized NHTSA ratings as we know them today) Active Features ABS: Anti-lock Braking System (ABS) available as an option, typically on rear wheels or 4-wheel. Passive Features Airbags: Driver-side airbag standard for 1991 model year. Seatbelts: Three-point inertia-reel front seat belts 💡 Technology Features Infotainment Audio System: AM/FM stereo radio, optional cassette player, optional CD player Driver Assistance Cruise Control: Available as an option Connectivity Connectivity Features: None beyond basic vehicle functions; no Bluetooth or USB ports 🔧 Maintenance Service Intervals Oil Change Interval: Every 3,000 - 5,000 miles or 6 months (depending on driving conditions and oil used - consult manual for specific recommendations) Transmission Fluid Change: Every 30,000 - 60,000 miles or 2-3 years for automatic transmissions (check fluid level regularly) Fluid Specifications Engine Oil Type: API SG or SH, SAE 5W-30 or 10W-30 (refer to manual for exact recommendations based on engine and temperature) Coolant Type: GM specified Type 1 or Type 2 antifreeze (typically ethylene glycol based, 50/50 mix with distilled water) Brake Fluid Type: DOT 3 Power Steering Fluid: GM Power Steering Fluid or Dexron II/III ATF Transmission Fluid Type: Dexron II or Dexron III Automatic Transmission Fluid (ATF) Known Issues Common Problems: CPI spider injector leaks/failures (5.7L), intake manifold gasket leaks, fuel pump issues, worn U-joints, radiator leaks, rear main seal leaks, brake component wear. Electrical Gremlins: Grounding issues, corroded connectors, and failing relays can cause intermittent electrical problems. 📚 Vehicle History Brand Heritage Chevrolet Trucks: Chevrolet has a long-standing legacy in the pickup truck market, dating back to...