Segment:
Full-size luxury sedan
Competitors:
Ford Crown Victoria, Mercury Grand Marquis, Toyota Avalon, Chrysler 300
Comfort And Luxury:
Smooth ride, quiet cabin, spacious interior, available premium features
Powertrain Options:
Available V6 and V8 engines, front-wheel drive (FWD) and optional all-wheel drive (AWD)
Powertrain:
Engine mechanical, cooling system, lubrication system, fuel system, ignition system, exhaust system, starting system, charging system
Drivetrain:
Automatic transmission (4T80-E, 4T65-E/4T65-E HD), transaxle, drive axles, differentials
Chassis:
Suspension (front and rear), steering system, braking system (ABS, traction control), wheels and tires
Electrical:
Battery, starting and charging, lighting, instruments and indicators, horn, wiper and washer systems, power windows, power door locks, mirrors, seats, antennas, audio system, climate control blower, trailer wiring
Body:
Body structure, exterior trim, doors, hood, decklid, interior trim, seating systems, glass and mirrors, roof systems, bumpers
HVAC:
Heating, ventilation, and air conditioning systems, controls, refrigerant charging
Maintenance:
Scheduled maintenance, oil changes, filter replacements, fluid checks and changes, tire rotation, brake inspection
Troubleshooting:
Diagnostic procedures, symptom-based troubleshooting, wiring diagrams, component testing
Repair:
Component removal and installation, rebuild procedures, body repair, electrical system diagnosis and repair
Diagnostics:
On-Board Diagnostics (OBD-II) system, diagnostic trouble codes (DTCs), scan tool usage
Depth:
Comprehensive, including detailed photos, diagrams, exploded views, specifications, and step-by-step instructions for professional mechanics and technicians
Compatibility:
Windows and MAC computers
Printability:
Printable pages (single or entire manual)
Binding:
Digital download (no physical binding)
Paper Type:
N/A (digital format)
Usage Rights:
Lifetime use, unlimited computers, no expiry dates, no renewal fees
Engine 3.8L V6:
3.8L naturally aspirated OHV V6 (L32)
Engine 3.8L V6 Horsepower:
205 hp @ 5200 rpm
Engine 3.8L V6 Torque:
230 lb-ft @ 3200 rpm
Engine 3.8L V6 Fuel System:
Sequential Multi-Port Fuel Injection (MPI)
Engine 3.8L V6 Bore X Stroke:
96.52 mm x 107.0 mm (3.80 in x 4.21 in)
Engine 3.8L V6 Compression Ratio:
9.5:1
Engine 3.8L V6 Oil Capacity:
4.5 quarts (4.3 L) with filter (refer to manual for exact specification)
Engine 3.8L V6 Recommended Oil:
SAE 5W-30 (refer to manual for exact specification and Dexos approval if applicable)
Engine 4.6L V8:
4.6L naturally aspirated DOHC V8 (Northstar L37)
Engine 4.6L V8 Horsepower:
292 hp @ 6400 rpm (L37)
Engine 4.6L V8 Torque:
285 lb-ft @ 4400 rpm (L37)
Engine 4.6L V8 Fuel System:
Sequential Electronic Fuel Injection (EFI)
Engine 4.6L V8 Bore X Stroke:
93 mm x 84 mm (3.66 in x 3.31 in)
Engine 4.6L V8 Compression Ratio:
10.3:1 (L37)
Engine 4.6L V8 Oil Capacity:
5.25 quarts (4.97 L) with filter (refer to manual for exact specification)
Engine 4.6L V8 Recommended Oil:
SAE 5W-30 (refer to manual for exact specification and Dexos approval if applicable)
Engine 4.6L V8 Variant:
Northstar V8 (L37) - Performance variant, also available is a slightly detuned CXS version (275hp/295lb-ft)
Transmission Type:
4-speed automatic (4T65-E or 4T65-E HD for V8, 4T80-E for AWD V8)
Transmission Features:
Electronically controlled, driver shift control, performance algorithms
Transmission Fluid Type:
Dexron VI Automatic Transmission Fluid (ATF) (refer to manual for specific models)
Transmission Fluid Capacity:
Approx. 6.5 quarts (6.2 L) for 4T65-E, 8.0 quarts (7.6 L) for 4T80-E (refer to manual for precise capacity)
Length:
Approximately 203.4 inches (5167 mm)
Width:
Approximately 73.6 inches (1870 mm)
Height:
Approximately 57.9 inches (1471 mm)
Wheelbase:
Approximately 116.0 inches (2946 mm)
Curb Weight:
Varies by model and powertrain, typically 3700-4000 lbs (1680-1815 kg)
NHTSA Front Impact:
5-star (driver and passenger) for all model years tested
IIHS Side Impact:
Good (for applicable model years)
Braking System:
Four-wheel anti-lock disc brakes (ABS)
Traction Control:
Traction Control System (TCS) standard on most trims, often integrated with StabiliTrak on higher trims
Airbags:
Frontal airbags for driver and passenger, side-impact airbags, available head curtain airbags
Seatbelts:
Three-point seatbelts with pretensioners
Infotainment System:
Available touchscreen navigation, premium audio systems (Bose), dual-zone climate control
Driver Assistance Features:
Available parking assist sensors, StabiliTrak stability control
Connectivity Options:
Available OnStar system
Oil Change Interval:
Every 7,500 miles or 6 months (whichever comes first) using synthetic oil (refer to manual for specific intervals based on driving conditions)
Transmission Fluid Change:
Check at 7,500 miles, change at 100,000 miles or as per manual recommendation based on driving conditions
Coolant Change:
Initial change at 100,000 miles, then every 50,000 miles thereafter (refer to manual for specific coolant type)
Spark Plug Replacement:
V6: 100,000 miles (iridium); V8: 100,000 miles (iridium) (refer to manual)
Coolant Type:
GM "green" coolant (GMC 6043M) or equivalent, or Dex-Cool OAT coolant depending on specific model/year (refer to manual)
Brake Fluid Type:
DOT 3 or DOT 4 (refer to manual)
Power Steering Fluid Type:
GM Power Steering Fluid or equivalent (refer to manual)
Engine 4.6L V8 Issues:
Northstar engine sensitivity to cooling system failures, potential for intake manifold gasket leaks, timing chain wear
Transmission Issues:
4T65-E transmission common issues include solenoid issues, torque converter clutch shudder, and planetary gearset wear
Suspension Issues:
Front strut bearing noise, worn control arm bushings
Electrical Issues:
Window regulator failures, power seat switch failures, body control module (BCM) issues
Buick Legacy:
Long-standing reputation for comfort, quietness, and American luxury
Lucerne Introduction:
Replaced the Buick LeSabre and Park Avenue, built on the GM G-platform
Assembly Location:
Detroit-Hamtramck Assembly Plant, Michigan
