The 2007 Buick Lucerne represents the second generation of this full-size luxury sedan, built on the GM G-body platform. Known for its comfort-oriented ride, spacious interior, and Buick's signature QuietTuning technology, the Lucerne offered a refined driving experience. This model was available with a choice of two distinct powertrains: the robust 3.8L V6 (L26) producing 205 horsepower and 230 lb-ft of torque, or the more powerful 4.6L Northstar V8 (LD8) delivering 275 horsepower and 295 lb-ft of torque. The Lucerne aimed to provide a blend of American comfort and available performance, positioning itself as a strong contender in its segment against vehicles like the Ford Crown Victoria and Chrysler 300. This comprehensive factory service manual provides in-depth information for the 2007 Buick Lucerne, covering all trim levels including CX, CXL, and Super. The manual details maintenance procedures, routine service intervals, and fluid specifications for both the 3.8L V6 and 4.6L V8 engines. It also thoroughly explains the powertrain, chassis, and electrical systems, offering detailed troubleshooting guides, diagnostic trouble codes, and repair procedures for component removal, installation, and overhaul. Technicians and owners will find factory-level detail, including diagrams, illustrations, and wiring schematics, essential for maintaining and repairing the vehicle effectively. 🏷️ Basic Information Identification Make: Buick Model: Lucerne Year: 2007 Generation Generation: Second Generation Codes Platform: GM G-body (GMT199) 👋 Introduction Market Position Vehicle Segment: Full-size Luxury Sedan Competitive Analysis Competitors 2007: Ford Crown Victoria/Mercury Grand Marquis, Chrysler 300, Toyota Avalon, Lincoln Town Car Key Features Distinctive Attributes: Comfort-oriented ride, spacious interior, available Northstar V8 engine, QuietTuning technology. 📋 Manual Details Coverage Areas Trim Levels: CX, CXL, Super Engine Options Covered: 3.8L V6 (L26), 4.6L V8 (Northstar LD8) Page Count Estimated Page Count: Estimated 2000-3000+ pages (typical for factory service manuals) Manual Type Manual Type: Factory Service Manual / Repair Manual Language Language: English Format Digital Format: PDF Download 📖 Manual Coverage Systems Covered Powertrain: Engine (3.8L V6, 4.6L V8), Fuel System, Emission Control, Cooling System, Lubrication System, Ignition System, Starting & Charging System, Automatic Transmission (4T65-E) Chassis: Suspension (Front & Rear), Steering (Power), Brakes (Front & Rear Disc, ABS), Wheels & Tires, Parking Brake Electrical And Body: Body Control Module (BCM), Powertrain Control Module (PCM), Instrument Cluster, Lighting, Wipers & Washers, Horn, Door Locks, Power Windows, Mirrors, Seats, Air Conditioning (HVAC), Supplemental Restraint System (SRS - Airbags, Seatbelts), Cruise Control, Audio/Visual Systems, Multiplex/CAN Communication, Engine Immobilizer, Keyless Entry Procedures Included Maintenance: Routine maintenance, fluid changes, filter replacements, tune-ups Diagnostics: Troubleshooting guides, diagnostic trouble codes (DTCs), symptom-based diagnostics Repair And Rebuild: Component removal, installation, disassembly, assembly, and overhaul procedures for all major systems Technical Depth Depth Of Coverage: Factory-level, comprehensive detail including step-by-step instructions, diagrams, illustrations, and wiring schematics. 📊 Manual Specifications File Format File Type: PDF Print Quality Printability: Fully printable, with ability to enlarge images and diagrams. Binding Type Binding Type: N/A (Digital PDF format) Paper Type Paper Type: N/A (Digital PDF format) ⚙️ Engine Specifications Primary Engine Engine 1: 3.8L (3800 Series III) V6 (L26) Engine 1 Horsepower: 205 hp @ 5200 rpm Engine 1 Torque: 230 lb-ft @ 4000 rpm Optional Engine Engine 2: 4.6L Northstar V8 (LD8) Engine 2 Horsepower: 275 hp @ 6000 rpm Engine 2 Torque: 295 lb-ft @ 4400 rpm Fuel System Fuel Delivery: Sequential Fuel Injection (SFI) 🔧 Transmission Standard Transmission Type: 4-speed Automatic (4T65-E) Optional Optional Transmission: N/A for 2007 model year Features Transmission Features: Driver Shift Control (manual shift mode) 📐 Dimensions Exterior Length: 203.4 inches Width: 73.0 inches Height: 58.3 inches Wheelbase: 116.0 inches Weights Curb Weight Min: 3,700 lbs (approx. for 3.8L V6) Curb Weight Max: 3,950 lbs (approx. for 4.6L V8 Super) 🛡️ Safety Features Ratings NHTSA Front Impact Driver: 5-Star NHTSA Front Impact Passenger: 5-Star IIHS Front Offset Bm: Good Active Features Traction Control: Standard (All models) Stability Control: Standard on CXL and Super models, Optional on CX ABS: Standard (4-wheel disc) Passive Features Airbags: Frontal, Side-impact (front and rear outboard), available front-seat mounted side-impact airbags. Seatbelts: Front pretensioners, load limiters. 💡 Technology Features Infotainment Audio System: Standard AM/FM stereo with CD player, optional Bose premium sound system, optional touchscreen navigation system. Driver Assistance Parking Assist: Available rear parking assist sensors. Cruise Control: Standard cruise control, available adaptive cruise control on Super models. Connectivity Onstar: Available OnStar communication system. Comfort Features Heated Seats: Available heated front and rear seats. Memory Seats: Available driver's seat memory. 🔧 Maintenance Service Intervals Oil Change Interval: Every 7,500 miles or 6 months, using Dexos approved synthetic oil (check manual for specific recommendations). Engine Air Filter: Replace every 45,000 miles or as needed based on inspection. Spark Plugs 3.8L: Replace every 100,000 miles (iridium type). Spark Plugs 4.6L: Replace every 100,000 miles (iridium type). Fluid Specifications Engine Oil 3.8L: SAE 3.5W-30 Synthetic (Check manual for specific GM specs, likely meeting GM6094M)...