🏷️ Basic Information Identification Make: Chevrolet Model: Corvette Year: 1975 Trim Level: 427 Codes Vin Prefix: 1Z37 Engine Code Primary: LS4 👋 Introduction Market Position Segment: American Sports Car, Performance Grand Tourer Target Audience: Enthusiasts, Owners, Mechanics specializing in classic American muscle cars Competitive Analysis Competitors: Ford Mustang Mach 1, Dodge Challenger R/T, Pontiac Firebird Trans Am Key Features Vehicle Appeal: Iconic styling, powerful V8 engine, open-air motoring (T-top/convertible options) Manual Value Proposition Purpose: Essential resource for maintaining, troubleshooting, and repairing the 1975 Corvette 427. 📋 Manual Details Coverage Areas Manual Type: Workshop Repair Service Manual Language: English Format: PDF Download Completeness: All Models, Engines, Trim, Transmission Types for 1975 Corvette 📖 Manual Coverage Systems Covered Engine: Engine Overhaul, Tuning, Diagnosis, Repair (LS4 454ci V8) Transmission: Manual and Automatic Transmission Repair, Clutch, Driveshaft, Axles Fuel System: Fuel Injection (4-barrel Rochester Quadrajet carburetor), Fuel Pump, Lines, Tank Cooling System: Radiator, Fan, Water Pump, Hoses, Thermostat Ignition System: Distributor, Spark Plugs, Ignition Wires, Coil, Timing Exhaust System: Manifolds, Pipes, Mufflers, Catalytic Converter (if applicable to 1975 models as first year) Brakes: Hydraulic System, Front Disc Brakes, Rear Disc Brakes, Parking Brake, Adjustment Steering: Power Steering System, Steering Column, Wheel Suspension: Front Independent Suspension (Unequal-Length A-Arms, Coil Springs), Rear Transverse Leaf Spring, Control Arms, Bushings Electrical System: Wiring Diagrams, Charging System (Alternator), Starting System (Starter), Battery, Lighting, Gauges, Switches Body: Body Panels, Doors, Hood, Targa Top, Bumpers, Interior Trim, Glass Procedures Included Maintenance: Scheduled Maintenance, Fluid Changes, Filter Replacements, Lubrication Troubleshooting: Diagnostic Procedures for Common and Uncommon Issues Repair: Step-by-Step Repair Instructions for All Major Components Diagnostics: Fault Finding and Diagnosis Guides Technical Depth Depth: Comprehensive Rebuild and Overhaul Procedures for Engine, Transmission, and Drivetrain Components Detail Level: Includes Torque Specifications, Clearances, Timing Settings, and Electrical Schematics 📊 Manual Specifications File Format File Type: PDF Searchability: Searchable Text Content Printability: Printable Pages Print Quality Image Resolution: High-Resolution Scans for Clear Diagrams and Illustrations Binding Type Binding: N/A (Digital Download) Paper Type Paper: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Type: V8 Displacement: 454 cubic inches (7.4 Liters) Engine Code: LS4 Performance Horsepower Net: 195 hp @ 3600 rpm (SAE Net) Torque Net: 330 lb-ft @ 2400 rpm (SAE Net) Fuel System Carburetor: Rochester Quadrajet 4-barrel Fuel Type: Unleaded gasoline Compression Ratio Compression Ratio: 8.5:1 Block Material Block Material: Cast Iron Head Material Head Material: Cast Iron 🔧 Transmission Standard Transmission Type: 3-speed Turbo Hydra-Matic Automatic Optional Transmission Type: 4-speed Manual (M21 Close-Ratio was available, though less common) Features Automatic Features: Stall torque converter, shift kit options Manual Features Manual Features: Heavy-duty clutch, synchromesh engagement Drivetrain Drivetrain: Rear-Wheel Drive Rear Axle Rear Axle Ratio: 3.08:1 (Optional: 3.36:1, 3.55:1, 4.11:1 for manual; 3.08:1 for automatic) 📐 Dimensions Exterior Length: 179.4 inches Width: 69.2 inches Height: 47.8 inches (Coupe) Wheelbase: 98.0 inches Front Track: 59.7 inches Rear Track: 61.0 inches Weights Curb Weight: Approximately 3,500 - 3,700 lbs Gross Vehicle Weight Rating: Not typically published as a GVWR for this era/type of vehicle 🛡️ Safety Features Ratings Crash Test Ratings: NHTSA ratings not applicable to this era. Active Features Braking System: Power front and rear disc brakes. Steering System: Standard power steering for improved maneuverability. Passive Features Seatbelts: Three-point seat belts Rollover Protection: T-top roof structure provides some reinforcement. 💡 Technology Features Infotainment Radio: AM/FM Radio, often with an 8-track player or cassette option. Gauges: Full complement of analog gauges: speedometer, tachometer, oil pressure, water temperature, ammeter, fuel level. Driver Assistance Driver Assistance Features: None in the modern sense; primarily focus on basic power steering. 🔧 Maintenance Service Intervals Oil Change: Every 3,000 miles or 6 months, whichever comes first. Transmission Fluid Change: Every 24,000 miles or 24 months. Coolant Flush: Every 24,000 miles or 24 months. Tune Up: Spark plug replacement every 20,000-30,000 miles, ignition wire inspection/replacement as needed. Fluid Specifications Engine Oil: API SF, SAE 10W-30 or 10W-40 (refer to manual for specific operating temperature recommendations). Transmission Fluid Automatic: Dexron III (or equivalent) Automatic Transmission Fluid (ATF). Transmission Fluid Manual: GL-4 Gear Oil (e.g., SAE 80W-90). Coolant: 50/50 mix of ethylene glycol antifreeze and water. Brake Fluid: DOT 3 or DOT 4 Hydraulic Brake Fluid. Known Issues Engine Performance: Reduced power due to emissions controls (catalytic converter, EGR system), potential for carburetor tuning issues. Electrical System: Aging wiring harnesses can lead to intermittent issues, gauge malfunctions. Suspension: Wear in bushings, ball joints, and tie rod ends common due to age and mileage. Frame And Body: Corrosion, especially in areas exposed to road salt, and fiberglass delamination or cracking. Recommended Parts Air Filter Part Number: Refer to manual for specific PNs, typically ACDelco or equivalent. Oil Filter Part Number: Refer to manual for specific PNs, typically ACDelco PF2 or equivalent. 📚 Vehicle History Brand Heritage Brand: Chevrolet, a division of General Motors, has...