Welcome to the comprehensive service and repair manual for the Buick Lucerne, produced between 2006 and 2009. This full-size luxury sedan, built on the GM G-body platform, offers a comfortable and quiet ride, spacious interiors, and a choice of capable V6 and V8 engines. Known for its smooth performance and premium features, the Lucerne was designed to provide an elevated driving experience, competing with other luxury sedans of its era. Its engineering emphasizes reliability and occupant comfort, making it a distinguished choice for discerning drivers. This factory service repair workshop manual, presented in English, is your definitive guide to all repairs, servicing, and troubleshooting procedures for the Buick Lucerne. It covers every system, from the powertrain and drivetrain to the chassis, electrical components, and body. You will find detailed information on scheduled maintenance, diagnostic procedures, component removal and installation, and technical specifications, complete with diagrams and step-by-step instructions. This resource is invaluable for owners, mechanics, and technicians aiming to maintain the integrity and performance of their Buick Lucerne. 🏷️ Basic Information Identification Make: Buick Model: Lucerne Year Range: 2006-2009 Codes Platform: GM G-body (second generation) 👋 Introduction Market Position Segment: Full-size luxury sedan Competitive Analysis Competitors: Ford Crown Victoria, Mercury Grand Marquis, Toyota Avalon, Chrysler 300 Key Features Comfort And Luxury: Smooth ride, quiet cabin, spacious interior, available premium features Powertrain Options: Available V6 and V8 engines, front-wheel drive (FWD) and optional all-wheel drive (AWD) 📋 Manual Details Coverage Areas Service Scope: All repairs, servicing, and troubleshooting procedures Page Count Estimated Pages: Hundreds Manual Type Type: Factory Service Repair Workshop Manual Language Language: English Format Digital Format: PDF Download 📖 Manual Coverage Systems Covered Powertrain: Engine mechanical, cooling system, lubrication system, fuel system, ignition system, exhaust system, starting system, charging system Drivetrain: Automatic transmission (4T80-E, 4T65-E/4T65-E HD), transaxle, drive axles, differentials Chassis: Suspension (front and rear), steering system, braking system (ABS, traction control), wheels and tires Electrical: Battery, starting and charging, lighting, instruments and indicators, horn, wiper and washer systems, power windows, power door locks, mirrors, seats, antennas, audio system, climate control blower, trailer wiring Body: Body structure, exterior trim, doors, hood, decklid, interior trim, seating systems, glass and mirrors, roof systems, bumpers HVAC: Heating, ventilation, and air conditioning systems, controls, refrigerant charging Procedures Included Maintenance: Scheduled maintenance, oil changes, filter replacements, fluid checks and changes, tire rotation, brake inspection Troubleshooting: Diagnostic procedures, symptom-based troubleshooting, wiring diagrams, component testing Repair: Component removal and installation, rebuild procedures, body repair, electrical system diagnosis and repair Diagnostics: On-Board Diagnostics (OBD-II) system, diagnostic trouble codes (DTCs), scan tool usage Technical Depth Depth: Comprehensive, including detailed photos, diagrams, exploded views, specifications, and step-by-step instructions for professional mechanics and technicians 📊 Manual Specifications File Format Compatibility: Windows and MAC computers Print Quality Printability: Printable pages (single or entire manual) Binding Type Binding: Digital download (no physical binding) Paper Type Paper Type: N/A (digital format) Licensing Usage Rights: Lifetime use, unlimited computers, no expiry dates, no renewal fees ⚙️ Engine Specifications Primary Engine Engine 3.8L V6: 3.8L naturally aspirated OHV V6 (L32) Engine 3.8L V6 Horsepower: 205 hp @ 5200 rpm Engine 3.8L V6 Torque: 230 lb-ft @ 3200 rpm Engine 3.8L V6 Fuel System: Sequential Multi-Port Fuel Injection (MPI) Engine 3.8L V6 Bore X Stroke: 96.52 mm x 107.0 mm (3.80 in x 4.21 in) Engine 3.8L V6 Compression Ratio: 9.5:1 Engine 3.8L V6 Oil Capacity: 4.5 quarts (4.3 L) with filter (refer to manual for exact specification) Engine 3.8L V6 Recommended Oil: SAE 5W-30 (refer to manual for exact specification and Dexos approval if applicable) Optional Engine Engine 4.6L V8: 4.6L naturally aspirated DOHC V8 (Northstar L37) Engine 4.6L V8 Horsepower: 292 hp @ 6400 rpm (L37) Engine 4.6L V8 Torque: 285 lb-ft @ 4400 rpm (L37) Engine 4.6L V8 Fuel System: Sequential Electronic Fuel Injection (EFI) Engine 4.6L V8 Bore X Stroke: 93 mm x 84 mm (3.66 in x 3.31 in) Engine 4.6L V8 Compression Ratio: 10.3:1 (L37) Engine 4.6L V8 Oil Capacity: 5.25 quarts (4.97 L) with filter (refer to manual for exact specification) Engine 4.6L V8 Recommended Oil: SAE 5W-30 (refer to manual for exact specification and Dexos approval if applicable) Engine 4.6L V8 Variant: Northstar V8 (L37) - Performance variant, also available is a slightly detuned CXS version (275hp/295lb-ft) 🔧 Transmission Standard Transmission Type: 4-speed automatic (4T65-E or 4T65-E HD for V8, 4T80-E for AWD V8) Features Transmission Features: Electronically controlled, driver shift control, performance algorithms Fluid Specifications Transmission Fluid Type: Dexron VI Automatic Transmission Fluid (ATF) (refer to manual for specific models) Fluid Capacity Transmission Fluid Capacity: Approx. 6.5 quarts (6.2 L) for 4T65-E, 8.0 quarts (7.6 L) for 4T80-E (refer to manual for precise capacity) 📐 Dimensions Exterior Length: Approximately 203.4 inches (5167 mm) Width: Approximately 73.6 inches (1870 mm) Height: Approximately 57.9 inches (1471 mm) Wheelbase Wheelbase:...