Vehicle Segment:
Full-size sedan
Target Audience:
Luxury-oriented sedan buyers seeking comfort and refinement.
Key Competitors:
Ford Crown Victoria, Mercury Grand Marquis, Chrysler 300, Dodge Charger.
Vehicle Highlights:
Comfortable ride, spacious interior, V8 engine option (in Super model), distinctive styling, quiet cabin.
Manual Benefit:
Empowers owners and independent technicians with factory-level diagnostic and repair information, reducing reliance on expensive dealerships.
Powertrain:
Engine mechanical, fuel system, cooling system, lubrication system, exhaust system, ignition system, engine performance diagnostics.
Transmission:
Automatic transmission service, overhaul, diagnostics, fluid and filter replacement, torque converter.
Drivetrain:
Front-wheel drive system, CV axles, differentials.
Suspension:
Front and rear suspension components, struts, springs, control arms, bushings, alignment specifications.
Steering:
Power steering system, steering column, rack and pinion, pump, fluid specifications.
Brakes:
Front and rear brakes, ABS system, hydraulic components, brake fluid specifications, bleeding procedures.
Electrical:
Charging system, starting system, battery, wiring diagrams, fuses, relays, lighting system, power accessories.
Body:
Body panels, doors, windows, locks, interior trim, exterior trim, structural components.
HVAC:
Heating, ventilation, and air conditioning system service, refrigerant, components, diagnostics.
Safety Systems:
Airbag system diagnostics and service, seat belt mechanisms.
Maintenance:
Scheduled maintenance, oil changes, filter replacements, fluid checks and top-offs, spark plug replacement, belt inspection and replacement.
Troubleshooting:
Diagnostic procedures for common and uncommon issues, symptom-based troubleshooting guides, wiring diagram interpretation.
Repair:
Component removal and installation, engine rebuild procedures, transmission overhaul, brake system repairs, electrical component replacement.
Diagnostics:
Diagnostic trouble codes (DTCs) interpretation, scan tool usage, sensor testing, actuator testing.
Depth:
Comprehensive factory-level detail, including step-by-step instructions, torque specifications, clearances, diagnostic trees, and exploded views.
Component Level:
Detailed information on individual components, their function, and repair procedures.
Engine 1 Displacement:
3.8 Liters (230.6 cubic inches)
Engine 1 Configuration:
3.8L V6 (Naturally Aspirated, OHV)
Engine 1 Power:
205 hp @ 5200 rpm (L36)
Engine 1 Torque:
230 lb-ft @ 4000 rpm (L36)
Engine 2 Displacement:
3.9 Liters (238.2 cubic inches)
Engine 2 Configuration:
3.9L V6 (Naturally Aspirated, 3-valve SOHC VVT)
Engine 2 Power:
240 hp @ 6200 rpm (LZ9); 233 hp @ 6000 rpm (LGD)
Engine 2 Torque:
233 lb-ft @ 3200 rpm (LZ9); 240 lb-ft @ 4400 rpm (LGD)
Fuel Delivery:
Sequential Port Fuel Injection (SFI)
Fuel Type:
Unleaded gasoline
Coolant Type:
Dex-Cool® (GM specification 6277M) Orange coolant (50/50 mix with deionized water)
Oil Type:
SAE 5W-30 (Recommended by GM)
Oil Capacity:
Approximately 4.5 US quarts (4.3 Liters) with filter, check owner's manual for exact capacity.
Length:
Approximately 203.1 inches (5159 mm)
Width:
Approximately 73.2 inches (1859 mm)
Height:
Approximately 58.2 inches (1478 mm)
Wheelbase:
Approximately 116.0 inches (2946 mm)
Curb Weight:
Approximately 3700 - 3900 lbs (1678 - 1769 kg), varies by trim and options.
Trunk Capacity:
Approximately 17.8 cubic feet (504 liters)
NHTSA Front Impact:
5-star (driver and passenger) for most model years.
NHTSA Side Impact:
5-star (front) and 4-star (rear) for most model years.
IIHS Offset Frontal:
Good (for most years tested).
ABS:
Standard Anti-lock Braking System (ABS)
Traction Control:
Traction Control System (TCS) standard on most models.
Airbags:
Frontal airbags, side-impact airbags (optional on some trims, standard on others).
Seatbelts:
Three-point seat belts with pretensioners for all outboard seating positions.
Audio System:
Available Bose® premium sound system, CD player, MP3 capability, available navigation system.
Climate Control:
Available dual-zone automatic climate control.
Parking Assist:
Available rear parking assist sensors.
Remote Start:
Available remote vehicle start system.
Onstar:
Available OnStar® system for safety and communication.
Oil Change Interval:
Every 7,500 miles (12,000 km) or 6 months, whichever comes first, with synthetic oil. Check specific model year for exact recommendation. Oil Life Monitoring System is also present.
Air Filter Replacement:
Inspect every 15,000 miles (24,000 km), replace as needed or every 30,000 miles (48,000 km).
Spark Plug Replacement:
3.8L V6 (L36): ~100,000 miles. 3.9L V6 (LZ9/LGD): ~100,000 miles (uses iridium-tipped plugs).
Transmission Fluid Change:
Inspect every 45,000 miles (72,000 km), replace as needed or per severe service schedule (e.g., every 60,000-90,000 miles). Refer to manual for precise recommendation.
Power Steering Fluid:
GM Power Steering Fluid (P/N 12345867 or equivalent)
Brake Fluid:
DOT 3 brake fluid
Engine Mounts:
Premature wear or failure of engine mounts, leading to vibration.
Transmission Issues:
Occasional issues with the 4T65-E transmission, such as torque converter shudder or solenoid failures.
Suspension Noise:
Strut mounts, ball joints, and sway bar links can develop noise or wear.
Power Steering Pump:
Leaking or noisy power steering pumps.
Buick Legacy:
Buick has a long history of producing comfortable and refined American sedans.
Lucerne Positioning:
Replaced the Buick LeSabre and Park Avenue, serving as Buick's flagship sedan.
Generations:
First generation: 2006-2011.
Manufacturing Plant:
Detroit-Hamtramck Assembly, Michigan, USA.
Production End:
Production ended in 2011, with the LaCrosse taking over as Buick's flagship sedan.
