🏷️ Basic Information Identification Make: Buick Model: Reatta Year: 1990 Codes Vin Prefix: 1G3 👋 Introduction Market Position Positioning: Premium personal luxury coupe, targeting a sophisticated buyer Competitive Analysis Competitors: Ford Thunderbird, Chevrolet Lumina Coupe (later models), Chrysler LeBaron Coupe Key Features Design: Two-seater, front-wheel-drive, retractable hardtop available (though not explicitly mentioned for 1990 in this manual's context, it was a defining Reatta feature) Manual Value Proposition: Provides OEM-level repair information, enabling owners to perform maintenance and repairs, saving costs and fostering self-sufficiency. 📋 Manual Details Coverage Areas Primary Coverage: Full vehicle service and repair Scope: All models and all repairs A-Z Page Count Estimated Page Count: Extensive (specific count not provided, but indicated as comprehensive) Manual Type Type: Factory Service and Repair Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine: Detailed service, diagnosis, and repair Control System: Diagnosis and repair Mechanical: Comprehensive repair procedures Fuel System: Service specifications and repair Emission Control: Service and diagnosis Cooling System: Service and repair Lubrication System: Service specifications Ignition System: Service and repair Charging System: Diagnosis and repair Automatic Transmission: Service and repair Manual Transmission: Service and repair Drive Axle: Service and repair Suspension: Service and repair Wheel And Tire: Service and specifications Brake Control: Service and repair Brake System: Detailed service and repair Parking Brake: Service and repair Steering Column: Service and repair Power Steering: Service and repair Air Conditioning: Service and repair Supplemental Restraint System: Service and safety precautions Seat Belt System: Service and repair Engine Immobilizer: Diagnosis and repair Cruise Control: Service and repair Wiper And Washer: Service and repair Door Lock System: Service and repair Meter And Audio Visual: Service and repair Horn System: Service and repair Windshield Glass Mirror: Service and repair Instrument Panel: Service and repair Seat System: Service and repair Engine Hood Door: Service and repair Exterior Interior Trim: Service and repair Electrical System: Extensive diagrams and troubleshooting Multiplex Can Communication: Diagnosis and repair Procedures Included Maintenance: Scheduled maintenance procedures Diagnostics: Step-by-step diagnostic procedures for all systems Repair: Complete repair instructions for all components and systems Troubleshooting: Troubleshooting guides and fault finding charts Wiring Schematics: Complete and detailed wiring diagrams Technical Depth Depth: Factory-level detail, suitable for professional technicians and advanced DIYers Illustrations Quality: High-quality diagrams and illustrations 📊 Manual Specifications File Format Format: PDF Print Quality Printability: All pages printable Zoom Capability: Images can be blown up and printed enlarged Binding Type Binding: Digital (PDF) - No physical binding Paper Type Paper Type: N/A (Digital Format) Compatibility Operating Systems: Windows Vista (32/64), XP, ME, 98, NT, 2000, and Mac Requirements Software Requirements: Adobe PDF Reader and Winzip (free online) ⚙️ Engine Specifications Primary Engine Engine Type: 3.8L (3800 cc) V6 OHV Engine Code: L27 (likely for 1990) Performance Horsepower: 165 hp @ 4400 rpm (estimated for 1990 L27) Torque: 210 lb-ft @ 2800 rpm (estimated for 1990 L27) Fuel System Fuel Delivery: Sequential Port Fuel Injection (SFI) Fuel Type: Unleaded gasoline Cooling System Cooling Type: Liquid-cooled Ignition System Ignition Type: Distributorless Ignition System (DIS) or Distributor Ignition (DI) depending on exact L27 variant 🔧 Transmission Standard Type: 4-speed automatic overdrive Transmission Model: GM 4T60-E (likely) Optional Optional Transmission: None offered for 1990 Features Drive Layout: Front-wheel drive (FWD) 📐 Dimensions Exterior Length: 187.7 inches (approx.) Width: 70.3 inches (approx.) Height: 51.7 inches (approx.) Weights Curb Weight: 3,374 lbs (approx.) 🛡️ Safety Features Ratings NHTSA Driver Front Impact: Not specifically rated for 1990, but contemporary GM vehicles generally performed adequately. Active Features ABS: Anti-lock Braking System (ABS) standard Passive Features Airbags: Driver and passenger airbags standard Seat Belts: Front three-point seat belts with pretensioners 💡 Technology Features Infotainment Audio System: AM/FM stereo with cassette and optional CD player, analog and digital displays Driver Assistance Cruise Control: Standard feature Connectivity Multiplex System: Features a multiplexed electrical system for control and communication between modules. Interior Features Climate Control: Automatic climate control system available 🔧 Maintenance Service Intervals Oil Change Interval: Every 3,000 miles or 3 months (typical for the era, consult manual for specifics) Tune Up Interval: Refer to manual for specific spark plug and filter replacement intervals. Fluid Specifications Engine Oil Type: API Service SG or SH, SAE 5W-30 or 10W-30 (consult manual for exact grade and capacity) Coolant Type: GM Goodwrench Super Coolant (or equivalent ethylene glycol-based coolant) Transmission Fluid: Dexron-III (or equivalent) Known Issues Common Problems: Early models experienced some electrical gremlins, particularly with the retractable hardtop mechanism. Some reports of accessory drive belt tensioner issues. Service Manual Benefit: Crucial for addressing potential electrical faults and specific powertrain maintenance due to the Reatta's unique engineering. 📚 Vehicle History Brand Heritage Brand Focus: Buick's reputation for comfortable, quiet, and well-appointed vehicles. Model Evolution Re Introduction: The Reatta was a new model introduced for the 1988 model year, designed to be...