🏷️ Basic Information Identification Make: Chevrolet Model: Corvette Generation: C4 Year: 1991 Codes Chassis Code: C4 👋 Introduction Market Position Value Proposition: Provides dealership-level technical information in a convenient digital format, enabling DIY owners to perform maintenance and repairs efficiently. Competitive Analysis Advantage: Offers comprehensive, vehicle-specific data including wiring schematics and detailed procedures, surpassing generic repair guides. Key Features Format Convenience: Single, easy-to-use PDF manual; printable pages; no greasy or torn paper manuals. Diagnostic Capability: Enables detailed diagnostics and troubleshooting, reducing reliance on professional mechanics for common issues. Visual Aids: Includes diagrams, illustrations, and blow-up image capability for clarity. 📋 Manual Details Coverage Areas Primary Coverage: 1991 Chevrolet Corvette C4 Scope: All models and all repairs A-Z Page Count Estimated Page Count: Extensive (Specific number not provided, but described as comprehensive) Manual Type Type: Service and Repair Manual Source: Factory original service manual equivalent. Language Language: English Format File Format: PDF 📖 Manual Coverage Systems Covered Engine Management: Engine, Control System, Fuel Service Specifications, Emission Control, Ignition Starting Charging Drivetrain: Auto Transmission, Clutch, Manual Transmission, Transfer Propeller Shaft, Drive Shaft, Differential, Axle Suspension Chassis And Brakes: Tire & Wheel, Brake Control, Brake, Parking Brake, Steering Column, Power Steering HVAC And Comfort: Air Condition, Cruise Control Safety And Restraint: Suppl Restraint System, Seat Belt, Engine Immobilizer Body And Interior: Wiper & Washer, Door Lock, Windshield/Glass Mirror, Instrument Panel, Seat, Engine Hood/ Door, Exterior & Interior Electrical And Electronics: Electrical, Multiplex/ Can Communication, Meter Audio/Visual, Horn Procedures Included Maintenance: Scheduled maintenance procedures, fluid checks and changes, filter replacements. Diagnosis And Troubleshooting: System-specific diagnostic procedures, fault code interpretation, troubleshooting charts. Repair And Rebuild: Complete step-by-step instructions for component removal, disassembly, inspection, repair, and reassembly. Component Replacement: Detailed procedures for replacing major and minor components across all vehicle systems. Electrical Troubleshooting: Wiring schematics, circuit diagrams, and step-by-step troubleshooting for electrical faults. Component Removal Installation: Covers removal and installation of virtually all components, from simple items like wiper blades to complex ones like the engine and transmission. Diagnostic Charts: Features extensive diagnostic flowcharts for troubleshooting various symptoms and fault conditions. Technical Depth Depth: Factory level, highly detailed. Covers everything from basic maintenance to complex diagnostics and complete repairs. Accuracy: Vehicle-specific; identical to manuals used by dealership technicians. Wiring Schematics Detail: Includes comprehensive, detailed wiring schematics with color coding and component locations. 📊 Manual Specifications File Format Format: PDF Searchability: Searchable text within the PDF for quick information retrieval. Print Quality Printability: All pages are printable. Users can print only necessary pages and diagrams, including enlarged copies of images. Binding Type Binding: Digital (PDF format), no physical binding. Paper Type Paper Type: N/A (Digital format) Software Requirements Reader Software: Adobe PDF Reader (Free) Compression Software: Winzip or similar (Free options available) Compatibility Operating Systems: Windows (Vista 32/64, XP, ME, 98, NT, 2000) and Mac compatible. ⚙️ Engine Specifications Primary Engine Engine Type: 5.7L V8 Tuned Port Injection (TPI) Engine Code: L98 Performance Horsepower Est: 245 hp @ 4000 rpm (approx.) Torque Est: 345 lb-ft @ 3200 rpm (approx.) Fuel System Fuel Delivery: Sequential Port Fuel Injection (SFI) - Tuned Port Injection (TPI) system. The '91 model year saw a transition to SFI for many components while retaining the TPI intake manifold design. Cooling System Cooling Type: Liquid-cooled Lubrication Oil Type: API SG or SH Service Class; SAE 5W-30 Recommended (refer to manual for precise specification) Engine Management Ignition System: Distributorless Ignition System (DIS) / Direct Ignition (DI) for some models or specific components. Emission Controls: Catalytic converter, EGR (Exhaust Gas Recirculation), Thermactor air injection system. 🔧 Transmission Standard Type: 4-speed automatic transmission Optional Type: 6-speed manual transmission (Z51 Performance Package or specific options may have offered this) Automatic Fluid Fluid Type: Dexron-III (or equivalent automatic transmission fluid) Manual Fluid Fluid Type: GL-4 or GL-5 Gear Lubricant (specific viscosity to be confirmed in manual) 📐 Dimensions Exterior Length In: 178.3 Width In: 70.4 Height In: 46.4 Wheelbase In Wheelbase: 96.2 Weights Curb Weight Lbs Est: 3,200 - 3,400 lbs (depending on options) Cargo Cargo Volume Cu Ft: 13.0 (rear cargo area) 🛡️ Safety Features Ratings Crash Test NHTSA: N/A for this model year (NHTSA ratings were less standardized for sports cars of this era). Passive Features Airbags: Driver-side airbag (standard). Seatbelts: 3-point inertia-reel seat belts. Active Features ABS: Anti-lock Braking System (ABS) standard. Traction Control: Selective Electronic Traction Control (ETC) available on some models/packages. 💡 Technology Features Infotainment Audio System: Factory Delco-Bose sound system, AM/FM stereo with cassette player. Optional CD player. Display Technology: Digital instrument cluster with LCD readouts for speed, RPM, and other data. Analog gauges for fuel and temperature. Driver Assistance Cruise Control: Standard cruise control system. Connectivity Multiplex Communication: Early forms of multiplexed communication systems used for various vehicle functions, detailed in the manual's electrical schematics. 🔧 Maintenance Service Intervals Oil Change Interval...