🏷️ Basic Information

Make:

Buick

Model:

LaCrosse

Year:

2006

Product Type:

Service and Repair Manual

Platform:

GM G-body (GMT360 chassis underpinning)

👋 Introduction

Target Audience:

Professional automotive technicians, dealership service departments, and knowledgeable DIY car owners.

Vs Generic Manuals:

Significantly superior to generic repair guides due to its vehicle-specific nature, factory data, and comprehensive depth.

Feature 1:

Vehicle-specific accuracy: Utilizes the same data as dealer technicians.

Feature 2:

Comprehensive coverage: A-Z repairs, all models.

Feature 3:

Detailed illustrations and schematics: Facilitates understanding and repair accuracy.

Feature 4:

Digital format benefits: Searchable, printable, zoomable, and easy to manage.

Feature 5:

Cost-saving potential: Enables DIY repairs, reducing reliance on expensive shop labor.

📋 Manual Details

Coverage Scope:

All models and all repairs A-Z

Estimated Page Count:

Extensive (typical factory service manuals for this era are 1500-3000+ pages)

Type:

Factory Authorized Service Manual / Technician Repair Manual

Language:

English

Format:

Digital (PDF)

📖 Manual Coverage

Engine:

Complete coverage including maintenance, diagnosis, repair, specifications, fuel system, ignition, cooling, lubrication, emissions control, and performance tuning.

Transmission:

Automatic transmission service, diagnosis, repair, and specifications. (Manual transmission section likely included for completeness, though less common for LaCrosse models of this era).

Drivetrain:

Drive shaft, differential, axle, suspension, steering column, power steering, wheel and tire service, brake system (including parking brake).

Electrical:

Comprehensive wiring schematics, diagnosis, repair of all electrical systems including lighting, starting, charging, multiplex/CAN communication, body electrical, instrument panel, audio/visual, and power accessories.

Body Interior:

Exterior and interior trim, doors, windows, mirrors, seats, engine hood, HVAC, supplemental restraint system (SRS), seat belts, horn, wipers and washers, cruise control, engine immobilizer.

Maintenance:

Scheduled maintenance, fluid checks and changes, filter replacements, belt inspection and replacement, tune-up procedures.

Diagnostics:

Step-by-step diagnostic procedures for common and complex issues, including electrical system diagnosis, powertrain fault finding, and component testing.

Repair:

Detailed step-by-step repair instructions for virtually all mechanical and electrical components, from simple adjustments to complete overhauls.

Specifications:

Torque specifications, fluid types and capacities, electrical specifications, diagnostic trouble code (DTC) definitions, and component data.

Depth:

Factory-level detail, suitable for professional technicians and advanced DIY enthusiasts. Covers everything from basic maintenance to in-depth component removal, overhaul, and reinstallation.

📊 Manual Specifications

File Type:

PDF

Printability:

Fully printable, allowing users to select and print specific pages or sections. High-resolution images and diagrams.

Binding:

Not Applicable (Digital PDF format)

Paper Type:

Not Applicable (Digital PDF format)

Reader Requirements:

Adobe PDF Reader (free)

Compression Requirements:

Winzip or equivalent (free)

Operating Systems:

Windows (Vista 32/64, XP, ME, 98, NT, 2000) and Mac compatible.

⚙️ Engine Specifications

Engine Options:

Typically covered are the 3.8L V6 (L36/L32 Supercharged) and 3.6L V6 (LY7) engines.

3.8L V6 Horsepower:

Approx. 205 hp (natural aspiration), 240 hp (supercharged)

3.8L V6 Torque:

Approx. 230 lb-ft (natural aspiration), 250 lb-ft (supercharged)

3.6L V6 Horsepower:

Approx. 255 hp

3.6L V6 Torque:

Approx. 250 lb-ft

Injection Type:

Sequential Fuel Injection (SFI)

Bore X Stroke 3.8L:

3.80 in x 3.40 in (96.5 mm x 86.4 mm)

Bore X Stroke 3.6L:

3.70 in x 3.35 in (94 mm x 85.6 mm)

Valvetrain 3.8L:

Overhead Valve (OHV), 12 Valves

Valvetrain 3.6L:

Dual Overhead Camshaft (DOHC), 24 Valves, Variable Valve Timing (VVT)

🔧 Transmission

Transmission Type Standard:

4-speed automatic (4T65-E)

Transmission Type Optional:

4-speed automatic with manual mode (4T65-E HD for supercharged models)

Transmission Fluid Spec:

Dexron VI (or equivalent Dexron IIIH for service fills if VI is unavailable).

Differential Type:

Open differential (standard), potentially limited-slip on some performance variants or with specific option packages.

📐 Dimensions

Wheelbase:

Approx. 110.5 inches (2807 mm)

Length:

Approx. 199.9 inches (5077 mm)

Width:

Approx. 72.9 inches (1852 mm)

Height:

Approx. 58.5 inches (1486 mm)

Curb Weight Approx:

3600 - 3900 lbs (1633 - 1769 kg), varies by engine and equipment

Towing Capacity Approx:

Not typically specified for this model, designed as a personal luxury sedan.

Trunk Volume Approx:

Approx. 16.0 cubic feet (453 liters)

🛡️ Safety Features

NHTSA Front Impact:

5-Star (for driver and front passenger in many configurations)

NHTSA Side Impact:

4-Star (typical for rear passengers, potentially 5-star for front)

IIHS Front Offset:

Good (typically for models with side airbags)

ABS:

Standard Anti-lock Braking System

Traction Control:

Standard or optional Traction Control System (TCS).

Stability Control:

Optional StabiliTrak (or similar electronic stability control system).

Airbags:

Frontal airbags, available side-impact airbags (curtain or seat-mounted).

Seat Belts:

Three-point seat belts with pretensioners for front occupants.

💡 Technology Features

Audio System:

Premium audio systems available, often with CD player, AM/FM radio, and potentially Monsoon or Bose sound systems.

Navigation:

Optional factory navigation system was available for this model year.

Cruise Control:

Standard cruise control, often with steering wheel mounted controls.

Parking Assist:

Rear parking assist sensors were an available option.

Onstar:

OnStar communication system was available and integrated into the vehicle's electrical system.

🔧 Maintenance

Oil Change Interval:

Typically every 3,000-7,500 miles (4,800-12,000 km) or 6-12 months, depending on driving conditions and oil type specified in the manual. Consult manual for exact interval.

Coolant Flush Interval:

Initial service at ~100,000 miles (160,000 km), then every ~50,000 miles (80,000 km) thereafter (based on Dex-Cool). Manual confirmation is critical.

Spark Plug Replacement:

Varies by engine. 3.8L typically ~100,000 miles. 3.6L with iridium plugs can also be 100,000 miles. Manual confirmation required.

Engine Oil Type:

SAE 3.8L: 3.8L requires 5W-30. 3.6L requires 5W-30. Always confirm with manual for viscosity and API certification (e.g., API SN or newer).

Coolant Type:

GM specified orange silicate-free, long-life coolant (Dex-Cool).

Brake Fluid Type:

DOT 3 or DOT 4 (confirm in manual).

3.8L Supercharger:

Supercharger decoupler pulley failures can occur, leading to noise or loss of boost.

3.6L Timing Chain:

Early 3.6L engines (including 2006) were prone to timing chain wear and stretching, leading to rough running and potential engine damage if not addressed.

Body Control Module:

Intermittent electrical issues related to Body Control Module (BCM) or related wiring can sometimes be reported.

Fuel Pump:

Occasional fuel pump failures, especially as the vehicle ages.

📚 Vehicle History

Buick Legacy:

Buick has a long history of producing comfortable, quiet, and luxurious American sedans.

Lacrosse Introduction:

The LaCrosse was introduced for the 2005 model year, replacing the Buick LeSabre and Park Avenue. It was positioned as a premium mid-size/large sedan.

2006 Model Year Updates:

Minor updates might have included packaging changes or feature availability adjustments, but the core platform and powertrains remained consistent with the 2005 introduction.

Manufacturing Location:

Oshawa, Ontario, Canada (GM Assembly Plant).

🏆 Awards & Recognition

Segment Positioning:

Positioned as a comfortable, quiet, and feature-rich personal luxury sedan in the large sedan segment.

Consumer Reports Reliability Historical:

Reliability for early LaCrosse models, particularly those with the 3.6L engine, received mixed reviews; the 3.8L generally showed better reliability. Consult specific model year reviews.