Vehicle Segment:
Luxury Sedan
Competitors:
BMW 5 Series, Mercedes-Benz E-Class, Audi A6, Lexus GS
Luxury Appointments:
Premium materials, advanced technology, refined ride quality.
Performance Orientation:
Available V8 engines, refined chassis, rear-wheel or all-wheel drive options.
Coverage Scope:
All Models, Engines, Trims, and Transmission Types
Estimated Pages:
Comprehensive (exact count not specified, but described as 'Complete Workshop Service Repair Manual')
Type:
Workshop Service and Repair Manual
Format:
Downloadable Digital File (PDF)
Powertrain:
Engine Mechanical, Engine Control System (ECM), Fuel System, Ignition System, Exhaust System, Cooling System, Lubrication System
Transmission Drivetrain:
Automatic Transmission (e.g., 4T80-E), Drivetrain, Axles, Driveshafts, Differentials
Chassis:
Suspension System (Front & Rear), Steering System, Brake System (Front & Rear, ABS, Traction Control)
Electrical Electronics:
Body Control Module (BCM), Powertrain Control Module (PCM), Infotainment System, Lighting Systems, Instrument Cluster, Wiring Diagrams, Diagnostics, Sensors, Actuators
Body Interior:
Body Repair, Interior Trim, Seats, HVAC System, Doors, Windows, Locks, Body Panels, Bumpers
Maintenance:
Scheduled Maintenance, Oil Changes, Filter Replacements, Fluid Checks and Replacements, Tune-Ups
Repair Overhaul:
Engine Rebuilding, Transmission Overhaul, Suspension Component Replacement, Brake Pad/Rotor Replacement, Electrical Component Diagnosis and Replacement
Diagnostics Troubleshooting:
Diagnostic Trouble Codes (DTCs), Symptom-Based Troubleshooting, Component Testing, Electrical Circuit Diagnosis
Installation Replacement:
Component Installation and Replacement (e.g., alternators, starters, sensors, body panels)
Depth:
Comprehensive from basic maintenance to advanced diagnostics and complete rebuild procedures.
Engine Option 1:
4.6L Northstar V8 (LD8/L37 variations)
Engine Option 2:
4.4L Supercharged Northstar V8 (XLR-V derived for some models, though less common in standard STS lineup for these years, typically 4.6L variants are most prevalent)
Engine Option 3:
3.6L LY7 V6 (Optional on some models)
4.6L V8 Horsepower:
Approx. 320-330 hp (depending on specific L37/LD8 variant)
4.6L V8 Torque:
Approx. 310-315 lb-ft (depending on specific L37/LD8 variant)
3.6L V6 Horsepower:
Approx. 255 hp
3.6L V6 Torque:
Approx. 250 lb-ft
Injection Type:
Sequential Multi-Port Fuel Injection (MPI)
Fuel Type:
Premium Unleaded Gasoline (91 octane recommended for optimal performance)
Northstar Engine Variants:
L37 (performance-oriented), LD8 (torque-oriented)
Transmission Type:
6-speed automatic (e.g., 6L80 for some models, 4-speed 4T80-E for earlier V8s, but manual covers all variations)
Drivetrain Options:
Rear-Wheel Drive (RWD), All-Wheel Drive (AWD)
Transmission Features:
Driver Shift Control (manual shifting capability), performance shift modes.
Transmission Fluid Type:
Dexron-VI (for 6-speed automatics), Dexron-III (for 4-speed automatics)
NHTSA Front Impact:
5-Star (for driver and front passenger)
NHTSA Side Impact:
5-Star (for front and rear passengers)
Traction Control:
Standard (TCS)
Electronic Stability Control:
Standard (StabiliTrak)
Anti Lock Brakes:
Standard (ABS)
Airbags:
Frontal airbags, front side-impact airbags, side curtain airbags.
Seatbelts:
3-point seatbelts with pretensioners.
Infotainment System Name:
Cadillac User Experience (CUE) was introduced later; for these years, it featured a navigation system, premium audio (e.g., Bose), and climate controls integrated into the dashboard.
Audio System:
Bose premium sound system with multiple speakers.
Navigation:
Optional factory navigation system.
Adaptive Cruise Control:
Optional feature on some trims.
Parking Assist:
Optional rear parking assist sensors.
Bluetooth:
Optional Bluetooth hands-free calling integration.
Keyless Entry Start:
Keyless Access and Remote Start.
Heated Cooled Seats:
Optional heated and ventilated front seats, heated rear seats.
Oil Change Interval:
Typically every 5,000 - 7,500 miles or 6 months, depending on driving conditions and oil type used.
Transmission Fluid Change:
Recommended every 60,000 - 100,000 miles, consult manual for specific intervals by transmission type.
Coolant Change:
Recommended every 50,000 - 100,000 miles or 5 years, depending on coolant type.
Engine Oil Type:
SAE 5W-30 Synthetic (API SN or newer)
Engine Oil Capacity:
Approx. 5.0 - 7.0 quarts (depending on engine variant, consult manual)
Power Steering Fluid:
Dexron-VI or equivalent power steering fluid.
Northstar Engine Head Gaskets:
While significantly improved from earlier generations, some Northstar engines could still be prone to head gasket issues if overheated or improperly maintained. Manual will cover diagnostic procedures.
Vibrations:
Some owners reported NVH (Noise, Vibration, Harshness) issues, potentially related to engine mounts, suspension bushings, or driveshaft balance. Manual covers related components.
Electronic Modules:
As with many luxury vehicles of this era, electronic control modules (ECM, BCM) can sometimes experience failures or require recalibration. Manual provides diagnostic procedures.
Cadillac Legacy:
Long history of American luxury, known for comfort, performance, and distinctive styling.
Sts Lineage:
Successor to the Cadillac Seville, representing Cadillac's move towards a more dynamic and globally competitive luxury sedan.
Manufacturing Location:
Lansing, Michigan, USA
