This manual covers the Buick LaCrosse, a full-size luxury sedan produced for the model years 2005 through 2009. It was designed to offer a comfortable ride, a spacious interior, and upscale styling, competing with vehicles like the Chrysler 300 and Toyota Avalon. The LaCrosse was available with a range of powerful V6 and V8 engines, including 3.6L V6, 3.8L V6, and 5.3L V8 options, and was manufactured in the USA. Known for its quiet cabin and available premium features, the LaCrosse aimed to provide a refined and enjoyable driving experience. This comprehensive Factory Workshop Service Repair Manual provides detailed information for the maintenance, repair, and diagnostics of the Buick LaCrosse. It covers all major systems, including the engine, transmission, brakes, suspension, steering, electrical systems, HVAC, and body. With over 6000 pages of content, this manual includes routine maintenance procedures, diagnostic troubleshooting guides, step-by-step repair instructions, and technical specifications for the various engine variants. High-resolution illustrations, photos, and diagrams are included to assist owners, mechanics, and technicians in keeping their LaCrosse in optimal condition. 🏷️ Basic Information Identification Make: Buick Model: LaCrosse Model Years Covered: 2005, 2006, 2007, 2008, 2009 Engine Variants Covered: 3.6L V6, 3.8L V6, 5.3L V8 Codes Vin Code Prefix: 1G3 👋 Introduction Market Position Vehicle Segment: Full-size luxury sedan Competitive Analysis Key Competitors: Ford Five Hundred/Taurus, Chrysler 300, Toyota Avalon, Chevrolet Impala. Key Features Vehicle Selling Points: Comfortable ride, spacious interior, available V8 power, upscale styling, quiet cabin. 📋 Manual Details Coverage Areas Systems Covered: Engine, Transmission, Brakes, Suspension, Steering, Electrical, HVAC, Body, Interior, Safety Systems, Lighting, Fuel System, Exhaust System, Cooling System, Wheels and Tires, Diagnostic Procedures, Troubleshooting. Page Count Total Pages: 6000+ Manual Type Type: Factory Workshop Service Repair Manual Language Language: English Format Format: PDF 📖 Manual Coverage Systems Covered Engine Specifics: 3.6L V6, 3.8L V6, 5.3L V8 Engine Mechanical, Engine Performance, Engine Electrical, Fuel & Emissions, Cooling System, Lubrication System, Engine Overhaul Procedures, Torque Specifications. Procedures Included Routine Maintenance: Oil changes, filter replacements, fluid checks and top-offs, spark plug replacement, belt inspection and replacement, brake pad replacement, tire rotation. Diagnostic Troubleshooting: Fault code interpretation, electrical system diagnostics, engine performance diagnostics, transmission troubleshooting, HVAC system diagnosis, ABS and Airbag system diagnostics. Repair Overhaul: Engine rebuild procedures, transmission overhaul, brake system repair, suspension component replacement, steering system repair, electrical component replacement, body panel repair and replacement. Technical Depth Depth Of Information: Comprehensive workshop-level repair and maintenance procedures, including detailed diagnostic flowcharts, step-by-step repair instructions, and specific torque specifications. Covers basic troubleshooting to complete component overhaul. 📊 Manual Specifications File Format Portability: Compatible with all Windows and Mac computers (Windows 10, 8, 7, Vista, XP, ME, 98, NT, 2000), Tablets, and Phones. Supports 32-bit and 64-bit operating systems. Print Quality Illustration Resolution: High Resolution Illustrations, Photos, and Diagrams Binding Type Delivery Method: Digital Download / CD (implied by product description format) Paper Type Digital Format Features: Read and print pages directly from CD (if applicable), or copy entire manual to hard drive. Searchable content within PDF for quick access to information. ⚙️ Engine Specifications Primary Engine 3.6L V6: Displacement: 3.6L (3564 cc); Configuration: V6; Bore x Stroke: 94.0 mm x 85.6 mm; Compression Ratio: 10.2:1; Horsepower: ~252 hp @ 6300 rpm; Torque: ~251 lb-ft @ 3400 rpm; Fuel System: Sequential Port Fuel Injection; Emissions: Meets EPA Tier 2 Bin 5 standards. Secondary Engine 3.8L V6: Displacement: 3.8L (3791 cc); Configuration: V6 (Supercharged option available on some trims/years, though not explicitly listed for this manual's coverage); Bore x Stroke: 96.5 mm x 86.4 mm; Compression Ratio: 9.2:1 (NA); Horsepower: ~205 hp @ 5200 rpm (NA); Torque: ~230 lb-ft @ 4000 rpm (NA); Fuel System: Sequential Port Fuel Injection. Optional Engine 5.3L V8: Displacement: 5.3L (5328 cc); Configuration: V8 (LS-based Gen III/IV Small Block); Bore x Stroke: 96.0 mm x 92.0 mm; Compression Ratio: 9.5:1; Horsepower: ~325 hp @ 5200 rpm; Torque: ~335 lb-ft @ 4000 rpm; Fuel System: Sequential Port Fuel Injection; Features: Active Fuel Management (AFM) likely on later models. Performance Acceleration 0 60 Mph: Varies by engine: 3.6L V6: ~7.5-8.0 seconds; 3.8L V6: ~8.5-9.0 seconds; 5.3L V8: ~6.0-6.5 seconds. Fuel System Fuel Type: Unleaded gasoline, minimum 87 octane. Higher octane recommended for optimal performance with 5.3L V8. 🔧 Transmission Standard Transmission Type And Gears: 6-speed automatic (Hydra-Matic 6T70/6T75 for 3.6L and 5.3L); 4-speed automatic (4T65-E for 3.8L). Optional Transmission Availability: Not applicable for this model, automatic transmissions were standard across engine offerings. Features Transmission Features: Driver Shift Control (manual shifting capability), Tow/Haul mode (on some models), Adaptive Shift Control. 📐 Dimensions Exterior Length: ~202.0 inches Width: ~73.1 inches Height: ~58.4 inches Wheelbase: ~118.5 inches Weights Curb Weight: Varies by engine: ~3,700 - 4,000 lbs Cargo Trunk Capacity: ~15.1 cubic feet 🛡️ Safety Features Ratings NHTSA Front Impact Driver: 5 Stars (2005-2009 models) NHTSA Front Impact...