🏷️ Basic Information

Make:

Chevrolet

Model:

Corvette

Year:

1973

Engine Options:

350ci V8, 454ci V8 (396 designation often used colloquially for big-block but specifically 1973 had 454)

Vin Prefix:

1Z37

Engine Code 350:

LS4 (Standard), L82 (Optional High Performance)

Engine Code 454:

LS4

👋 Introduction

Positioning:

The 1973 Corvette represented a refinement of the C3 generation, known for its blend of American muscle and sports car styling. It was positioned as a premium performance grand tourer.

Competitors:

Primarily competed with European sports cars and other American performance coupes, though few offered a comparable combination of style and V8 power.

Features:

Unique '73 features included the elimination of the chrome front bumper in favor of a 5-mph impact-absorbing bumper system with a urethane cover, a significant styling change. T-tops were standard on coupe models.

Value Proposition:

This manual is essential for owners and mechanics seeking to maintain, diagnose, and repair the 1973 Corvette. Its comprehensive nature covers all critical systems, ensuring accurate and effective service.

📋 Manual Details

Coverage:

All Models, Engines (350ci, 454ci), Trim Levels, Transmissions

Page Count:

Estimated 800-1000+ pages (typical for comprehensive workshop manuals of this era)

Type:

Workshop Repair Service Manual

Language:

English

Format:

PDF Download

📖 Manual Coverage

Engine:

350ci Small Block V8 (LS4, L82), 454ci Big Block V8 (LS4) - Overhaul, Tuning, Diagnosis, Emissions Control Systems

Transmission:

Manual 4-Speed (M20, M21, M22), Automatic 3-Speed (TH400) - Overhaul, Adjustment, Diagnosis, Fluid Service

Chassis:

Suspension (Independent Front, Rear), Steering (Recirculating Ball), Brakes (Front Disc, Rear Disc), Frame and Body Structure

Electrical:

Wiring Diagrams, Lighting, Ignition System, Charging System, Starting System, Gauges, Horn, Wiper System, Radio

Body:

Body Panels, Doors, Hood, T-Tops, Bumpers, Interior Trim, Weatherstripping, Glass, Seats

Maintenance:

Lubrication, Fluid Changes, Filter Replacements, Spark Plug Service, Belt Tensioning, Tire Rotation

Troubleshooting:

Diagnostic Flowcharts, Symptom-Based Diagnosis for Engine, Electrical, and Mechanical Systems

Repair:

Component Overhaul, R&R (Remove and Replace) Procedures for Major Assemblies, Component Level Repairs

Special Tools:

Identification and usage of specialized Chevrolet tools required for specific procedures

Depth:

Comprehensive: from basic fluid checks to complete engine and transmission rebuilds, detailed diagnostic procedures, and wiring schematic interpretation.

📊 Manual Specifications

File Type:

PDF (Portable Document Format)

Searchability:

Likely text-searchable if scanned from original print with OCR.

Quality:

Dependent on original scan quality; aims for clear reproduction of diagrams, text, and illustrations.

Binding:

N/A (Digital PDF format)

Paper:

N/A (Digital PDF format)

⚙️ Engine Specifications

Standard Engine:

350ci (5.7L) Small Block V8

Optional Engine Big Block:

454ci (7.4L) Big Block V8 (Designated LS4)

Horsepower 350 Std:

190 hp (SAE Net, LS4 - low compression due to emissions mandates)

Horsepower 350 Hi Perf:

250 hp (SAE Net, L82 - higher compression, dual exhaust)

Horsepower 454:

275 hp (SAE Net, LS4 - low compression)

Torque 454:

370 lb-ft @ 3600 RPM (LS4)

Fuel Delivery 350 Std:

Rochester Quadrajet 4-barrel carburetor

Fuel Delivery 350 Hi Perf:

Holley 4-barrel carburetor (L82)

Fuel Delivery 454:

Rochester Quadrajet 4-barrel carburetor

Ignition Type:

Breaker Point Ignition (standard), High Energy Ignition (HEI) available on some later models or as upgrade.

Emissions Controls:

Positive Crankcase Ventilation (PCV), Exhaust Gas Recirculation (EGR), Air Injection Reactor (AIR) system (Air Pump)

🔧 Transmission

Standard Transmission:

Manual 4-Speed (M20 - Wide ratio, M21 - Close ratio, M22 'Rock Crusher' optional)

Optional Transmission:

Turbo Hydra-Matic 400 (TH400) 3-Speed Automatic

Clutch Type:

Single Dry Plate (Manual Transmission)

Transmission Fluid Auto:

Dexron III (or equivalent specification)

Transmission Fluid Manual:

GL-4 Gear Oil (typically SAE 80W-90)

📐 Dimensions

Length:

177.5 inches

Width:

70.8 inches

Height:

47.9 inches (coupe)

Wheelbase:

98.0 inches

Curb Weight Approx:

3,500 - 3,700 lbs (depending on engine and options)

Gvw:

Approx. 4,400 lbs

Standard Tire Size:

F70-15 or ER70-15

Wheel Bolt Pattern:

5 x 4.75 inches (5 x 120.65 mm)

Wheel Type:

Standard steel wheels with hubcaps, optional Rally wheels (15x7 or 15x8)

🛡️ Safety Features

Crash Testing:

No standardized crash test ratings (NHTSA/IIHS) existed in the same way they do today. Focus was on structural integrity and occupant protection with available features.

Braking System:

Power-assisted 4-wheel disc brakes (standard on all 1973 Corvettes)

Steering System:

Power steering (optional, but common)

Seat Belts:

3-point lap and shoulder belts

Impact Protection:

Reinforced frame, energy-absorbing steering column, 5-mph impact bumpers (front urethane, rear steel with guards).

💡 Technology Features

Audio System:

AM/FM Radio, optional AM/FM Stereo with 8-track tape player.

Gauges:

Speedometer, Tachometer, Fuel Gauge, Temperature Gauge, Oil Pressure Gauge, Voltmeter. All analog.

Assistance Features:

No electronic driver assistance features as understood today. Focus was on mechanical systems like power brakes and power steering.

Connectivity:

N/A (No electronic connectivity features available)

🔧 Maintenance

Oil Change Interval:

Typically every 3,000-5,000 miles or 6 months, or as specified by the manual.

Transmission Fluid Change:

Every 24,000-36,000 miles for automatic, or as per manual recommendations for manual.

Spark Plug Replacement:

Typically every 20,000-30,000 miles, depending on plug type.

Engine Oil Spec:

SAE 10W-30 or 10W-40 API SF/CD. Refer to manual for specific viscosity based on ambient temperature.

Coolant Spec:

Ethylene Glycol based antifreeze, mixed 50/50 with distilled water.

Brake Fluid Spec:

DOT 3 or DOT 4 Hydraulic Brake Fluid.

Common Wear Items:

Upholstery wear, fiberglass cracking (especially around windows), vacuum line deterioration, carburetor tuning issues, potential for rear main seal leaks on high mileage examples.

Emissions Related:

EGR valve operation, AIR system functionality, vacuum leaks affecting performance and emissions.

📚 Vehicle History

Heritage:

Chevrolet's Corvette is the quintessential American sports car, introduced in 1953. It has consistently evolved, blending performance, style, and American engineering.

C3 Generation:

The C3 generation (1968-1982) is characterized by its 'Mako Shark' styling. 1973 marked a transition, moving away from chrome bumpers towards the federally mandated 5-mph impact standards.

Production Volume 1973:

39,467 units

Assembly Location:

St. Louis Assembly Plant, St. Louis, Missouri

🏆 Awards & Recognition

Model Awards:

While specific awards for the 1973 model are not as commonly cited as modern vehicles, the Corvette generation consistently garnered praise for its design and performance within its era. Often featured in automotive enthusiast publications.

Performance Ratings:

Praised for its straight-line acceleration and handling capabilities relative to contemporary American cars.