🏷️ Basic Information Identification Make: Buick Model: Regal Year: 1990 Codes Platform: GM W-body 👋 Introduction Market Position Target Audience: DIY enthusiasts, independent repair shops, Regal owners seeking to maintain their vehicle Competitive Analysis Advantage Over Print: Convenience, instant access, cost-effectiveness, searchability, digital portability Key Features Licensing: Officially Licensed, ensuring accuracy and completeness of OE data User Friendliness: Easy-to-navigate interface, push-button access to information Cost Savings: Enables users to perform repairs and maintenance themselves, saving on labor costs 📋 Manual Details Identification Manual Type: Service and Repair Manual Software Manual Origin: Officially Licensed, OE Materials Derived Developer: RepairSurge Coverage Areas Primary Coverage: Repair and Maintenance Secondary Coverage: Troubleshooting, Diagnostics, Component Replacement Format File Format: PDF Download Access Method: Online, Web Browser Access Device Compatibility: PC, Laptop, Smartphone, Tablet Access Duration: 1 Year (with renewal discounts) Language Primary Language: English 📖 Manual Coverage Systems Covered Powertrain: Engine (3.1L V6, 3.8L V6), Transmission (Automatic) Chassis: Suspension (Front MacPherson Strut, Rear Independent), Steering (Power Rack and Pinion), Brakes (Front Disc, Rear Drum) Electrical: Wiring Diagrams, Lighting, Ignition, Starting, Charging, Instrumentation Climate Control: Heating, Ventilation, Air Conditioning (HVAC) Body: Body Panels, Doors, Windows, Interior Trim Procedures Included Maintenance: Oil Changes, Filter Replacements, Spark Plug Service, Fluid Checks and Top-offs Repair: Engine Component Replacement (e.g., water pump, alternator), Transmission Service, Brake Pad and Rotor Replacement, Suspension Component Replacement (e.g., ball joints, struts) Diagnostics: Troubleshooting Engine Performance Issues, Identifying Electrical Faults, Diagnosing Suspension Noises Technical Depth Depth Level: Comprehensive from basic maintenance to advanced repairs and diagnostics 📊 Manual Specifications File Format PDF Quality: High-resolution, printable pages Searchability: Searchable text for quick information retrieval Print Quality Print Recommendation: Printable for offline use Binding Type Binding Not Applicable: Digital Format Paper Type Paper Type Not Applicable: Digital Format ⚙️ Engine Specifications Primary Engine Engine Code 1: 3.1L V6 (VIN M) Engine Displacement 1: 3100 cc (189 cubic inches) Engine Type 1: Naturally Aspirated, Sequential Fuel Injection (SFI) Horsepower 1: Approx. 140 hp @ 4400 rpm Torque 1: Approx. 180 lb-ft @ 2000 rpm Optional Engine Engine Code 2: 3.8L V6 (VIN 3) Engine Displacement 2: 3800 cc (231 cubic inches) Engine Type 2: Naturally Aspirated, Sequential Fuel Injection (SFI) Horsepower 2: Approx. 165 hp @ 4400 rpm Torque 2: Approx. 200 lb-ft @ 2000 rpm Fuel System Fuel Delivery: Electronic Fuel Injection (EFI) / Sequential Fuel Injection (SFI) Recommended Fuel: 87 Octane Unleaded Gasoline 🔧 Transmission Standard Transmission Type: 4-Speed Automatic Transaxle Transmission Model: GM 4T60 Features Transmission Control: Electronic Control Unit (ECU) for shift points and diagnostics Fluid Type Transmission Fluid Spec: Dexron III Automatic Transmission Fluid 📐 Dimensions Exterior Length: Approx. 195.8 inches Width: Approx. 71.1 inches Height: Approx. 54.5 inches Wheelbase Wheelbase: Approx. 107.5 inches Weights Curb Weight Range: Approx. 3200-3400 lbs (depending on engine and options) 🛡️ Safety Features Passive Features Airbags: Driver-side airbag (standard) Seat Belts: Front and rear seat belts Child Safety: Rear door child safety locks Active Features Braking System: Power-assisted front disc brakes, rear drum brakes ABS: Anti-lock Braking System (ABS) optional on some trims 💡 Technology Features Infotainment Audio System: Factory AM/FM stereo with cassette player, optional CD player, optional premium sound systems. Dashboard: Analog gauges for speedometer, tachometer, fuel, and temperature; warning lights for critical systems. Driver Assistance Cruise Control: Standard or optional depending on trim level. Connectivity Connectivity Features: Limited by era; primarily analog systems, no digital connectivity like Bluetooth or USB. 🔧 Maintenance Service Intervals Oil Change Interval: Every 3,000-7,500 miles or 6-12 months (refer to manual for specific engine/oil type) Engine Oil Filter Replacement: With every oil change Spark Plug Replacement: Approx. 60,000 - 100,000 miles (depending on plug type) Transmission Fluid Change: Every 30,000 - 60,000 miles (depending on driving conditions) Fluid Specifications Engine Oil Spec: API SG, SAE 5W-30 (or as specified for temperature range) Coolant Spec: GM Type II Extended Life Coolant (Orange) or equivalent ethylene glycol-based coolant Fluid Capacities Engine Oil Capacity 3.1L: Approx. 4.5 quarts (with filter) Engine Oil Capacity 3.8L: Approx. 4.5 quarts (with filter) Transmission Fluid Capacity: Approx. 4.0 quarts (dry fill) / 11.0 quarts (total) Known Issues Common Problems 1: Intake manifold gasket leaks (3.1L V6), premature wear of suspension components (ball joints, control arm bushings), HVAC blower motor resistor failure, power window motor issues. Common Problems 2: Dashboard cracking (common for this era of GM vehicles), intermittent electrical issues, transmission solenoid problems. 📚 Vehicle History Brand Heritage Buick Legacy: Buick has a long history of producing comfortable, well-appointed, and often performance-oriented vehicles. Model Evolution Regal Positioning: The Regal has traditionally been positioned as a mid-size personal luxury coupe or sedan, offering a blend of comfort, style, and performance. 1990 Generation: The 1990 Regal is part of the third generation of the Regal, built on the GM W-body platform, which debuted for the 1988 model year....