🏷️ Basic Information

Make:

Buick

Model:

LaCrosse

Model Years Covered:

2005, 2006, 2007, 2008, 2009

Engine Variants Covered:

3.6L V6, 3.8L V6, 5.3L V8

Vin Code Prefix:

1G3

👋 Introduction

Vehicle Segment:

Full-size luxury sedan

Key Competitors:

Ford Five Hundred/Taurus, Chrysler 300, Toyota Avalon, Chevrolet Impala.

Vehicle Selling Points:

Comfortable ride, spacious interior, available V8 power, upscale styling, quiet cabin.

📋 Manual Details

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.

Total Pages:

6000+

Type:

Factory Workshop Service Repair Manual

Language:

English

Format:

PDF

📖 Manual Coverage

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.

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.

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

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.

Illustration Resolution:

High Resolution Illustrations, Photos, and Diagrams

Delivery Method:

Digital Download / CD (implied by product description format)

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

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.

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.

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.

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 Type:

Unleaded gasoline, minimum 87 octane. Higher octane recommended for optimal performance with 5.3L V8.

🔧 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).

Availability:

Not applicable for this model, automatic transmissions were standard across engine offerings.

Transmission Features:

Driver Shift Control (manual shifting capability), Tow/Haul mode (on some models), Adaptive Shift Control.

📐 Dimensions

Length:

~202.0 inches

Width:

~73.1 inches

Height:

~58.4 inches

Wheelbase:

~118.5 inches

Curb Weight:

Varies by engine: ~3,700 - 4,000 lbs

Trunk Capacity:

~15.1 cubic feet

🛡️ Safety Features

NHTSA Front Impact Driver:

5 Stars (2005-2009 models)

NHTSA Front Impact Passenger:

5 Stars (2005-2009 models)

NHTSA Side Impact Front Seat:

5 Stars (2005-2009 models)

NHTSA Side Impact Rear Seat:

5 Stars (2005-2009 models)

IIHS Top Safety Pick:

Yes (for applicable model years with specific equipment)

Brake System:

Four-wheel disc brakes, Anti-lock Braking System (ABS), Electronic Brake Force Distribution (EBD).

Stability Control:

StabiliTrak (Traction Control System with Stability Control) standard on most trims.

Airbags:

Frontal airbags for driver and passenger, side-impact airbags for front occupants, head curtain airbags for front and rear occupants (coverage varies by trim and year).

Seat Belts:

Three-point seat belts with pretensioners and load limiters for all seating positions.

💡 Technology Features

Audio System:

Available Bose premium audio system, CD player, MP3 capability, auxiliary input jack.

Navigation:

Optional factory navigation system with touchscreen interface.

Parking Assistance:

Optional rear parking assist sensors.

Remote Start:

Available factory remote start system.

Climate Control:

Dual-zone automatic climate control.

Seating:

Heated and ventilated front seats, power-adjustable driver and passenger seats with memory function.

🔧 Maintenance

Oil Change Interval:

Every 7,500 miles or 6 months, whichever comes first (using synthetic blend or full synthetic oil, as recommended by GM specification).

Tire Rotation:

Every 7,500 miles

Engine Coolant Flush:

First flush at 100,000 miles, then every 50,000 miles thereafter (Dex-Cool coolant).

Transmission Fluid Change:

Refer to manual for specific intervals, typically around 50,000-100,000 miles depending on driving conditions. Use GM specified Dexron VI fluid.

Engine Oil Specification:

SAE 5W-30 (API SN or later, GM dexos1™ Gen 2 compliant recommended)

Engine Coolant Specification:

GM Dex-Cool® (Orange, extended life coolant)

Transmission Fluid Specification:

GM DEXRON-VI Automatic Transmission Fluid

Common Problems 3 8L:

Intake manifold gasket leaks, occasional transmission solenoid issues, catalytic converter failure.

Common Problems 3 6L:

Timing chain tensioner and guide wear (leading to noise), oil leaks from valve covers, carbon buildup on intake valves.

Common Problems 5 3L:

Active Fuel Management (AFM) lifter issues, oil consumption, spark plug blow-outs (early models), torque converter shudder.

General Issues:

HVAC blower motor resistor failure, power seat actuator failures, sunroof drain issues (potential water leaks into cabin).

📚 Vehicle History

Buick Legacy:

Buick, a division of General Motors, has a long history of producing comfortable, refined, and American-styled vehicles, often positioned as a premium mainstream brand.

Lacrosse Introduction:

The LaCrosse replaced the Buick LeSabre and Park Avenue, marking a shift towards a more modern and European-influenced design language for Buick's large sedan.

Manufacturing Location:

Detroit/Hamtramck Assembly (USA)

🏆 Awards & Recognition

Awards Received:

Generally well-received for its comfort, quietness, and value within the large sedan segment. Received positive reviews for its spacious interior and smooth ride.

Consumer Reports Reliability:

Varied depending on model year and specific engine, generally average to below average for some powertrain components, particularly in earlier years.