Segment:
Full-size Luxury Sedan
Target Audience:
Buyers seeking a blend of American luxury, comfort, and performance.
Key Competitors 2005:
Lexus GS series, Mercedes-Benz E-Class, BMW 5 Series, Audi A6, Lincoln LS.
Model Era:
Second Generation STS (2005-2011).
Platform:
GM Sigma platform, shared with Cadillac CTS and SRX.
Primary Systems:
Instrument Cluster, Entertainment Systems, Climate Controls, Lighting, Driver Controls, Locks and Security, Seating and Safety Restraints, Driving Operations, Customer Assistance, Cleaning, Maintenance and Specifications, Engine Compartment, Engine Oil, Battery, Fuel Information, Air Filter(s), Refill Capacities, Lubricant Specifications, Accessories, Service Information and Specifications, Maintenance Information and Specifications.
Maintenance Procedures:
Routine maintenance checks, fluid level checks and top-offs (engine oil, coolant, brake fluid, power steering fluid, windshield washer fluid), tire pressure checks, basic cleaning procedures, accessory usage.
Technical Procedures:
Locating and identifying engine components, understanding dashboard indicators and warning lights, basic troubleshooting for common issues (e.g., battery drain, fluid leaks), information on vehicle identification numbers (VIN).
Depth Of Information:
Covers essential owner-level information for understanding vehicle operation, maintenance, and basic troubleshooting. Does not typically include detailed diagnostic procedures or component-level repair instructions found in a service manual.
Software Requirements:
PDF Reader (e.g., Adobe Acrobat Reader, Foxit Reader, or comparable).
Device Compatibility:
Any device capable of reading PDF files (computers, tablets, smartphones).
Digital Quality:
Compiled from factory manual, implying original print quality.
Binding Method:
Not Applicable (Digital Format)
Paper Material:
Not Applicable (Digital Format)
Engine Code Likely:
LD8 (3.6L V6) or LH2 (4.6L Northstar V8)
Horsepower 3.6L V6:
Approximately 255 hp
Torque 3.6L V6:
Approximately 250 lb-ft
Horsepower 4.6L V8 Northstar:
Approximately 320 hp (depending on specific Northstar variant)
Torque 4.6L V8 Northstar:
Approximately 310-315 lb-ft (depending on specific Northstar variant)
Fuel Delivery:
Electronic Fuel Injection (EFI)
Fuel Type:
Unleaded Gasoline
Engine Placement:
Front-engine
Length:
Approximately 199.1 inches
Width:
Approximately 72.1 inches
Height:
Approximately 57.2 inches
Wheelbase:
Approximately 113.4 inches
Curb Weight V6 Rwd:
Approximately 3,840 lbs
Curb Weight V8 AWD:
Approximately 4,150 lbs
Trunk Volume:
Approximately 15.3 cubic feet
NHTSA Front Impact Driver:
5-Star (for 2005 model year)
NHTSA Front Impact Passenger:
5-Star (for 2005 model year)
IIHS Front Offset Crash Rating:
Good (for 2005 model year)
Traction Control:
Standard
Electronic Stability Control:
Standard (StabiliTrak)
Antilock Braking System:
Standard
Airbags:
Frontal airbags, side-impact airbags, side curtain airbags.
Seatbelts:
Three-point safety belts with pretensioners.
Child Seat Anchors:
LATCH system
Audio System:
Bose premium audio system likely optional or standard on higher trims.
Navigation System:
Optional DVD-based navigation system.
Climate Controls:
Dual-zone automatic climate control.
Adaptive Cruise Control:
Optional feature.
Parking Assist:
Rear park assist sensors likely available.
Onstar:
Available integrated OnStar system.
Oil Change Interval:
Typically 7,500 miles or 6 months, but consult manual for specific driving conditions.
Tire Rotation Interval:
Approximately 7,500 miles or every oil change.
Transmission Fluid Change:
Refer to manual, often based on severe usage or mileage intervals (e.g., 50,000-100,000 miles).
Engine Oil Type V6:
Synthetic SAE 5W-30 (meeting GM spec GM6094M)
Engine Oil Type V8:
Synthetic SAE 5W-30 or 10W-30 (meeting GM spec GM6094M or GM4718M, consult manual).
Coolant Type:
Dex-Cool® (GM P/N 12346290 or equivalent orange silicate-free coolant)
Power Steering Fluid Type:
Dexron® III (or equivalent)
Engine Oil Capacity V6:
Approximately 5 quarts (with filter)
Engine Oil Capacity V8:
Approximately 5 quarts (with filter)
Common Wear Items:
Suspension components (ball joints, control arms), catalytic converters, power steering leaks, ignition coils (especially on Northstar V8).
Electronic Issues:
Occasional issues with body control modules, infotainment system glitches, or sensor failures.
Cadillac Legacy:
Long-standing American luxury brand with a history of innovation and upscale vehicles.
Sts Predecessor:
Cadillac Seville (STS designation originally applied to top trim level).
Sts Generation 2 Introduction:
2005 model year, significant redesign and re-positioning.
Manufacturing Location:
Lansing, Michigan, USA
