The 2007 Buick Lucerne is a full-size luxury sedan designed for consumers seeking a comfortable, spacious, and well-equipped American luxury vehicle. Built on the GMX335 platform, shared with models like the Cadillac DTS and Chevrolet Impala, the Lucerne offers a blend of traditional Buick comfort with updated styling and technology. It was available with a choice of two V6 engines: a 205 horsepower 3.8L V6 or a more powerful 233 horsepower 3.6L V6, both paired with a 4-speed automatic transmission and front-wheel drive. Known for its quiet ride and substantial interior, the Lucerne received high safety ratings, including 5 stars in frontal and side impact tests from the NHTSA. This comprehensive service and repair manual provides detailed information for maintaining and repairing your 2007 Buick Lucerne. It covers all major systems, including engine mechanicals, performance, transmission, drivetrain, suspension, steering, brakes, electrical systems, body, chassis, and HVAC. The manual includes scheduled maintenance procedures, troubleshooting guides, detailed repair and rebuild instructions, diagnostic procedures with wiring diagrams, and factory-level technical specifications. This resource is invaluable for owners, mechanics, and technicians aiming to ensure the optimal performance and longevity of their vehicle. 🏷️ Basic Information Identification Make: Buick Model: Lucerne Year: 2007 Codes Platform Code: GMX335 (shared with Cadillac DTS, Chevrolet Impala) 👋 Introduction Market Position Vehicle Segment: Full-size luxury sedan. Target Audience: Consumers seeking comfortable, spacious, and well-equipped American luxury sedans. Also appealing to DIY enthusiasts and independent repair shops. Competitive Analysis Key Competitors: Ford Five Hundred/Taurus, Chrysler 300, Toyota Avalon, Lincoln Town Car. Key Features Dealer Quality Info: Officially licensed and derived from OE (Original Equipment) materials, ensuring factory-level accuracy and completeness. Convenience: Instant online access, eliminating the need for physical manuals and offering superior searchability. Cost Savings: Empowers owners to perform DIY repairs and maintenance, significantly reducing labor costs associated with dealership or independent shop visits. 📋 Manual Details Coverage Areas Manual Type: Service and Repair Manual Software Format: PDF Download (Licensed Digital Access) Language: English Access Duration: 1 Year (with option for renewal) 📖 Manual Coverage Systems Covered Engine Mechanical: Detailed diagnosis, repair, and overhaul procedures for all powertrain components, including engine assembly, cylinder head, valvetrain, crankshaft, pistons, connecting rods, lubrication system, cooling system. Engine Performance: Fuel system diagnostics and repair (injection, fuel pump, pressure regulator), ignition system service (coils, spark plugs, sensors), emissions control systems (catalytic converter, O2 sensors, EVAP). Transmission Powertrain: Service and repair for automatic transmissions (e.g., 4T80-E), including fluid changes, seal replacement, clutch pack servicing, torque converter, valve body diagnostics. Drivetrain Axles: Front-wheel drive axle shaft inspection, replacement, and boot repair; differential service (if applicable to specific powertrain configurations). Suspension Steering: Detailed procedures for front and rear suspension components (struts, springs, control arms, ball joints, bushings), steering system (rack and pinion, power steering pump, tie rods), alignment specifications. Brakes: Front and rear brake system service (disc brakes), including rotor and pad replacement, caliper service, brake fluid flush and bleeding, ABS system diagnostics and component testing. Electrical Lighting: Comprehensive wiring diagrams, fuse and relay identification and testing, lighting system repair (headlights, taillights, interior), bulb replacement, diagnostics for electrical faults. Body Chassis: Body panel repair, door mechanisms, glass replacement, bumper service, chassis lubrication points, rust prevention. Heating Ventilation Ac: HVAC system diagnosis, refrigerant handling and recharge, compressor, evaporator, condenser service, blower motor, climate control module diagnostics. Procedures Included Maintenance: Scheduled maintenance intervals, oil changes, filter replacements, fluid checks and top-offs, tire rotation, spark plug replacement, battery maintenance. Troubleshooting: Diagnostic flowcharts, common fault identification, step-by-step troubleshooting guides for various systems and symptoms, error code interpretation. Repair Rebuild: Complete disassembly and reassembly instructions for all major components and systems, including engine rebuild, transmission overhaul, brake caliper rebuild, power steering rack replacement. Diagnostics: On-Board Diagnostics (OBD-II) system information, scan tool usage, diagnostic trouble code (DTC) retrieval and interpretation, sensor testing, module programming and relearning procedures. Wiring Diagrams: Detailed, system-specific wiring diagrams for all electrical circuits, including power distribution, grounds, control modules, and sensor connections. Technical Depth Level Of Detail: Factory-level diagnostic and repair procedures, including detailed specifications, tolerances, torque values, special tool requirements, and component identification. 📊 Manual Specifications File Format File Type: PDF Searchability: Searchable text content for quick information retrieval. Printability: Printable pages for convenience during hands-on work. Device Compatibility: Compatible with PC, laptop, smartphone, and tablet via web browser with internet connection. Print Quality Image Resolution: High-resolution images and diagrams for clarity. Binding Type Binding: Not Applicable (Digital Download) Paper Type Paper: Not Applicable (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Name 1: 3.8L V6 (L26) Displacement 1: 3800 cc / 230.5 cubic inches Configuration 1: Naturally Aspirated, Overhead Valve (OHV), 90-degree V-angle Horsepower 1: 205 hp @ 5200 rpm Torque 1: 230 lb-ft @ 4000 rpm Fuel System 1: Sequential Fuel Injection (SFI), Electronic Throttle Control (ETC) Bore X Stroke 1: 3.80 in x 3.39 in...