Positioning:
Luxury Sedan
Competitors 2005:
BMW 5 Series, Mercedes-Benz E-Class, Audi A6, Lexus GS, Acura RL
Platform:
GM Sigma platform, shared with Chevrolet Corvette (C6) and Pontiac GTO (in some configurations).
Design Philosophy:
Focus on performance, luxury, and advanced technology, marking Cadillac's resurgence.
Value:
Provides technicians and DIY enthusiasts with the same authoritative information used by dealership service departments.
Engine Management:
Engine Control System, Fuel Service Specifications, Emission Control, Intake Exhaust Cooling, Lube, Ignition Starting Charging
Drivetrain:
Auto Transmission Clutch, Manual Transmission (if applicable), Transfer Propeller Shaft, Drive Shaft, Differential, Axle Suspension
Brakes Steering:
Brake Control, Brake, Parking Brake, Steering Column, Power Steering
Electrical Electronics:
Electrical, Multiplex/CAN Communication, Cruise Control, Engine Immobilizer
Body Chassis:
Exterior & Interior, Engine Hood/ Door, Windshield/Glass Mirror, Instrument Panel, Seat, Door Lock
Comfort Convenience:
Air Condition, Wiper & Washer, Horn, Meter Audio/Visual
Safety Restraint:
Suppl. Restraint System (SRS), Seat Belt
Diagnostic Procedures:
Diagnosis and troubleshooting for all systems
Maintenance Procedures:
Scheduled maintenance, fluid changes, filter replacements, inspections
Repair Procedures:
Step-by-step instructions for component removal, installation, and repair
Electrical Procedures:
Wiring schematics, connector pinouts, electrical component testing
Depth:
Factory-level detail, including torque specifications, diagnostic trouble codes (DTCs), and repair sequences.
๐ Manual Specifications
Compatibility:
Windows Vista (32/64-bit), XP, ME, 98, NT, 2000, and Mac OS
Software Requirements:
Adobe PDF Reader, Winzip (or equivalent archive utility)
Printability:
All pages are printable, with option to enlarge images.
Binding:
Digital (PDF) - No physical binding
Paper Type:
N/A (Digital format)
โ๏ธ Engine Specifications
Engine Option 1:
4.6L Northstar V8 (L37 and LD8 variants)
Engine Displacement 1:
4600 cc (280 cu in)
Engine Horsepower 1:
Approx. 275-300 hp (depending on L37/LD8 variant)
Engine Torque 1:
Approx. 295-300 lb-ft (depending on L37/LD8 variant)
Fuel Delivery:
Sequential Fuel Injection (SFI)
Acceleration 0 60:
Approximately 6.0 - 7.0 seconds (V8)
Wheelbase:
Approx. 116.0 inches (2946 mm)
Overall Length:
Approx. 199.4 inches (5065 mm)
Overall Width:
Approx. 72.1 inches (1831 mm)
Overall Height:
Approx. 57.5 inches (1460 mm)
Curb Weight:
Approx. 3800 - 4000 lbs (depending on configuration)
NHTSA Front Impact Driver:
5 Stars
NHTSA Front Impact Passenger:
5 Stars
NHTSA Side Impact Front Driver:
5 Stars
NHTSA Side Impact Front Passenger:
5 Stars
NHTSA Side Impact Rear Driver:
4 Stars
NHTSA Side Impact Rear Passenger:
4 Stars
IIHS Front Offset Good:
Good
IIHS Side Impact Good:
Good
Stability Control:
StabiliTrak Electronic Stability Control
Traction Control:
Traction Control System (TCS)
Brake Assist:
Panic Brake Assist
Airbags Front:
Dual-stage front airbags
Airbags Side:
Front and rear side-curtain airbags, front seat-mounted side-impact airbags
Seatbelts:
Front pretensioners and load limiters, rear pretensioners
Infotainment System:
Optional DVD-based Navigation System, Bose premium audio system
Driver Assistance Features:
StabiliTrak, Traction Control, Magnetic Ride Control (optional)
Connectivity Features:
OnStar In-Vehicle Safety and Security System
Convenience Features:
Keyless Access with Push-Button Start, Heated and Ventilated Seats, Rain-Sensing Wipers
Oil Change Interval:
Every 7,500 miles (12,000 km) or 6 months, whichever comes first, with synthetic oil.
Engine Air Filter Replacement:
Every 30,000 miles (48,000 km) or 24 months.
Cabin Air Filter Replacement:
Every 15,000 miles (24,000 km) or 12 months.
Spark Plug Replacement:
Approx. 100,000 miles (160,000 km) for iridium-tipped plugs.
Engine Oil Type:
SAE 5W-30 Synthetic Engine Oil (API SM or Dexos approved)
Coolant Type:
GM Dex-Coolยฎ Long-Life Coolant (Orange)
Transmission Fluid Type:
Dexronยฎ VI Automatic Transmission Fluid
Northstar Head Gaskets:
While improved, earlier Northstar engines were known for head gasket issues; the 2005 model should be checked for coolant leaks.
Suspension Components:
Some owners report premature wear of front suspension components (bushings, ball joints) due to weight and performance.
Electronics Reliability:
As with many vehicles of this era, intermittent electronic module failures or sensor issues can occur.
Cadillac Legacy:
Long-standing American luxury marque known for innovation and comfort.
Sts Lineage:
The STS (Seville Touring Sedan) succeeded the Seville model, adopting a more performance-oriented and modern luxury image.
Second Gen Sts:
The 2005 model represents the second generation of the STS, built on the new global rear-wheel-drive Sigma platform.
Manufacturing Location:
Lansing Grand River Assembly Plant, Lansing, Michigan, USA
๐ Awards & Recognition
Ward 10 Best Engines:
The 4.6L Northstar V8 engine was a repeat winner of Ward's 10 Best Engines list in previous iterations, highlighting its technological advancements.
Jd Power Ratings:
Specific ratings for the 2005 STS can vary, but Cadillac as a brand aimed for higher quality perception in this segment.
