Vehicle Segment:
Full-size Luxury Sedan
Competitors 2007:
Ford Crown Victoria/Mercury Grand Marquis, Chrysler 300, Toyota Avalon, Lincoln Town Car
Distinctive Attributes:
Comfort-oriented ride, spacious interior, available Northstar V8 engine, QuietTuning technology.
Powertrain:
Engine (3.8L V6, 4.6L V8), Fuel System, Emission Control, Cooling System, Lubrication System, Ignition System, Starting & Charging System, Automatic Transmission (4T65-E)
Chassis:
Suspension (Front & Rear), Steering (Power), Brakes (Front & Rear Disc, ABS), Wheels & Tires, Parking Brake
Electrical And Body:
Body Control Module (BCM), Powertrain Control Module (PCM), Instrument Cluster, Lighting, Wipers & Washers, Horn, Door Locks, Power Windows, Mirrors, Seats, Air Conditioning (HVAC), Supplemental Restraint System (SRS - Airbags, Seatbelts), Cruise Control, Audio/Visual Systems, Multiplex/CAN Communication, Engine Immobilizer, Keyless Entry
Maintenance:
Routine maintenance, fluid changes, filter replacements, tune-ups
Diagnostics:
Troubleshooting guides, diagnostic trouble codes (DTCs), symptom-based diagnostics
Repair And Rebuild:
Component removal, installation, disassembly, assembly, and overhaul procedures for all major systems
Depth Of Coverage:
Factory-level, comprehensive detail including step-by-step instructions, diagrams, illustrations, and wiring schematics.
NHTSA Front Impact Driver:
5-Star
NHTSA Front Impact Passenger:
5-Star
IIHS Front Offset Bm:
Good
Traction Control:
Standard (All models)
Stability Control:
Standard on CXL and Super models, Optional on CX
ABS:
Standard (4-wheel disc)
Airbags:
Frontal, Side-impact (front and rear outboard), available front-seat mounted side-impact airbags.
Seatbelts:
Front pretensioners, load limiters.
Audio System:
Standard AM/FM stereo with CD player, optional Bose premium sound system, optional touchscreen navigation system.
Parking Assist:
Available rear parking assist sensors.
Cruise Control:
Standard cruise control, available adaptive cruise control on Super models.
Onstar:
Available OnStar communication system.
Heated Seats:
Available heated front and rear seats.
Memory Seats:
Available driver's seat memory.
Oil Change Interval:
Every 7,500 miles or 6 months, using Dexos approved synthetic oil (check manual for specific recommendations).
Engine Air Filter:
Replace every 45,000 miles or as needed based on inspection.
Spark Plugs 3.8L:
Replace every 100,000 miles (iridium type).
Spark Plugs 4.6L:
Replace every 100,000 miles (iridium type).
Engine Oil 3.8L:
SAE 3.5W-30 Synthetic (Check manual for specific GM specs, likely meeting GM6094M)
Engine Oil 4.6L:
SAE 4.5W-30 Synthetic (Check manual for specific GM specs, likely meeting GM6094M)
Transmission Fluid:
Dexron VI Automatic Transmission Fluid (ATF)
Coolant:
GM-specific orange coolant (Dex-Cool) - 50/50 mixture with distilled water.
Common Issues 3.8L:
Lower intake manifold gasket leaks (pre-2005 models, less common on 3.8L Series III), occasional fuel pump issues.
Common Issues 4.6L:
Northstar engine specific issues can include coolant leaks from head gaskets or oil cooler lines, intermittent power steering pump failures.
Suspension Issues:
Front strut mount wear, rear coil spring issues (sagging).
Electrical Issues:
Window regulator failures, HVAC blower motor resistor failure.
Buick Legacy:
Buick has a long history of producing comfortable, refined, and well-equipped American sedans.
Lucerne Introduction:
The Lucerne replaced the Park Avenue and LeSabre as Buick's flagship sedan in 2006.
Platform Sharing:
Based on the GM G-body platform, shared with other GM sedans of the era.
Manufacturing Location:
Detroit/Hamtramck Assembly, Michigan, USA
Jd Power Initial Quality:
Typically rated average to above average in initial quality for its segment in its early years.
Consumer Reports:
Consumer Reports ratings varied, with some praise for comfort and V8 performance, but mixed reviews on reliability for certain components.
