Target Audience:
DIY mechanics, professional technicians, and Buick Century owners seeking to perform their own maintenance and repairs.
Value Proposition:
Provides exact dealer-level repair information, saving users from generic guides and reliance on expensive repair shops.
Ease Of Use:
Single, searchable PDF document eliminating the need to flip through multiple books; printable pages for convenient on-site use.
Visual Aids:
Includes diagrams, illustrations, and wiring schematics to simplify complex procedures.
Accuracy:
Vehicle-specific information, not generic data, mirroring factory technician manuals.
Engine Systems:
Engine (general), Fuel Service Specifications, Emission Control, Intake Exhaust Cooling, Lube, Ignition Starting Charging
Transmission Systems:
Auto Transmission Clutch, Manual Transmission (if applicable), Transfer Propeller Shaft, Drive Shaft, Differential, Axle Suspension
Brake Systems:
Brake Control, Brake, Parking Brake
Steering Suspension Systems:
Tire & Wheel, Steering Column, Power Steering
Comfort Convenience Systems:
Air Condition, Wiper & Washer, Door Lock, Horn, Windshield/Glass Mirror
Safety Restraint Systems:
Suppl Restraint System, Seat Belt, Engine Immobilizer
Electrical Electronics Systems:
Electrical, Multiplex/Can Communication, Cruise Control, Meter Audio/Visual, Instrument Panel
Body Interior Exterior:
Seat, Engine Hood/ Door, Exterior & Interior
Diagnostic Procedures:
Diagnosis and troubleshooting for all vehicle systems.
Maintenance Procedures:
Scheduled maintenance, fluid changes, filter replacements.
Repair Procedures:
Complete step-by-step instructions for all mechanical, electrical, and body repairs.
Component Replacement:
Detailed procedures for replacing engine components, transmission, brakes, suspension, steering, HVAC, etc.
Depth Of Information:
Factory-level, highly detailed with complete instructions, illustrations, and wiring schematics.
Printability:
All pages printable
Binding Type:
Digital (PDF), no physical binding.
Paper Type For Printing:
User selectable upon printing.
Required Software:
Adobe PDF Reader, Winzip (both free online)
Operating System Compatibility
Compatibility:
Windows Vista (32/64), XP, ME, 98, NT, 2000, and Mac
Engine Options:
Likely includes the 3.1L V6 (L82) and the 3.8L V6 (L36/L27 variants, including supercharged options if applicable to certain trims).
Horsepower Torque Estimate:
Specifications vary by engine. For the 3.1L V6: approx. 150-160 hp. For the 3.8L V6: approx. 170-205 hp (non-supercharged).
Fuel Delivery:
Port Fuel Injection (PFI)
Coolant Type:
Typically Dex-Cool (GM P/N 1052751 or equivalent) extended life coolant, orange color.
Engine Oil Specification:
GM specification GM6094M, SAE 5W-30 viscosity grade recommended for most operating conditions. Always verify with the manual.
Ignition Type:
Distributorless Ignition System (DIS) with coil packs.
Transmission Type:
Automatic transmission (e.g., 4T65E) is standard on most Buick Century models.
Optional Transmission:
Manual transmission was not typically offered on the Buick Century during this era.
Automatic Transmission Fluid Type:
Dexron III (GM P/N 12378515 or equivalent), often superseded by Dexron VI. Refer to manual for specific fill.
Wheelbase:
Approximately 109.0 inches (2769 mm)
Length:
Approximately 199.7 inches (5072 mm)
Width:
Approximately 70.9 inches (1801 mm)
Height:
Approximately 55.0 inches (1397 mm)
Curb Weight:
Varies by model and equipment, generally around 3300-3600 lbs (1497-1633 kg).
NHTSA Frontal Impact Driver:
Likely rated 5-star (refer to specific test data if available).
NHTSA Frontal Impact Passenger:
Likely rated 5-star (refer to specific test data if available).
ABS:
Anti-lock Braking System (ABS) typically standard or available.
Airbags:
Frontal airbags for driver and passenger. Side airbags were optional on some trims.
Seatbelts:
Three-point seatbelts in all seating positions, with pretensioners for front occupants.
Audio System:
Standard AM/FM stereo with CD player or cassette. Optional premium sound systems available.
Instrument Panel:
Analog gauges with digital odometer. Features like a driver information center might be available on higher trims.
Cruise Control:
Standard or optional cruise control system.
Onstar:
OnStar communication system was available as an option on some trims.
Oil Change Interval:
Typically every 3,000 to 7,500 miles (4,800 to 12,000 km) or 6-12 months, depending on driving conditions and oil type used. Consult the manual for precise intervals.
Transmission Fluid Change Interval:
Recommended every 30,000 to 100,000 miles (48,000 to 160,000 km), depending on usage and fluid type. Often a good practice to check every 30,000 miles. Refer to the manual.
Coolant Flush Interval:
Initially at 5 years or 100,000 miles (160,000 km) for Dex-Cool, then every 5 years or 150,000 miles (240,000 km) thereafter. Verify with manual.
Brake Fluid Type:
DOT 3 or DOT 4 (depending on specific system requirements). Consult the manual for the precise specification.
Power Steering Fluid Type:
GM power steering fluid (P/N 1050010 or equivalent) or Dexron III/VI automatic transmission fluid.
Common Engine Issues:
Intake manifold gasket leaks (especially on 3800 V6), oil leaks, some transmission shifting issues (4T65E).
Common Suspension Steering Issues:
Worn strut mounts, ball joints, tie rod ends due to typical sedan usage.
Common Electrical Issues:
Window regulator failures, power lock actuator issues, some alternator or starter issues.
Buick Legacy:
Buick, a long-standing American automotive brand, is known for comfortable, well-equipped vehicles that bridge the gap between mainstream and luxury.
Century Lineage:
The Century nameplate has a long history with Buick, evolving through various generations. The 2004 model represents the later iterations of the W-body platform, emphasizing practicality and comfort.
Production Period:
The Buick Century was produced from 1936-1942, 1954-1958, and 1973-2005. The 2004 model year is within the final generation of this nameplate.
Safety Awards:
While specific awards for the 2004 model year are not readily highlighted, GM vehicles of this era generally aimed for good safety ratings from organizations like the NHTSA and IIHS.
Consumer Ratings General:
The Buick Century was generally well-regarded for its comfortable ride, spacious interior, and reliable V6 engines, often positioning it as a sensible family sedan.
