🏷️ Basic Information

Make:

Cadillac

Model:

STS

Year:

2009

Product Name:

Cadillac STS Complete Workshop Service Repair Manual 2009

👋 Introduction

Positioning:

The Cadillac STS (Seville Touring Sedan) was positioned as Cadillac's flagship luxury sedan, competing in the premium segment with European and domestic rivals, emphasizing performance, comfort, and advanced technology.

Competitors:

Key competitors included the BMW 5 Series, Mercedes-Benz E-Class, Audi A6, Lexus GS, and Jaguar XF.

Features:

The 2009 STS continued to offer rear-wheel-drive and optional all-wheel-drive, powerful V6 and V8 engine options, advanced Magnetic Ride Control suspension, and a refined interior with a focus on technology and luxury amenities.

Value:

This manual empowers owners and technicians to perform a wide range of maintenance and repair tasks, saving significant costs associated with dealership service and ensuring the longevity and optimal performance of the Cadillac STS.

📋 Manual Details

Models Covered:

All Models/Engines/Trim/Transmissions Types

Repair Scope:

Every Service & Repair Procedure A-Z

Estimated Page Count:

Over 1500 pages (typical for comprehensive workshop manuals of this era)

Type:

Workshop Service Repair Manual

Language:

English

Format:

Downloadable Digital Format (PDF)

📖 Manual Coverage

Engine:

All engine types, including diagnostics, overhaul, component testing, timing, lubrication, cooling, fuel delivery, emissions.

Transmission:

Automatic transmission service, diagnostics, repair, fluid services, torque converter, electronic controls.

Drivetrain:

All-Wheel Drive (AWD) system, rear-wheel drive (RWD) system, differentials, driveshafts, CV joints, wheel bearings.

Suspension:

Front and rear suspension systems, components (shocks, struts, control arms, bushings), alignment, air suspension system (if equipped).

Steering:

Power steering system, steering column, rack and pinion, power steering pump, fluid, troubleshooting.

Brakes:

Brake system components (calipers, rotors, pads, lines, master cylinder), Anti-lock Braking System (ABS), Electronic Stability Control (ESC), brake fluid specifications and bleeding procedures.

Electrical System:

Battery, charging system (alternator), starting system (starter motor), lighting, instrumentation, comfort controls, power accessories, wiring diagrams, diagnostic trouble codes (DTCs), fuse and relay identification.

Body:

Body panels, doors, hood, trunk, glass, interior trim, bumpers, seals, hinges, latches, body repair procedures.

HVAC:

Heating, Ventilation, and Air Conditioning (HVAC) system, refrigerant handling, compressor, condenser, evaporator, climate control module, diagnostic procedures.

Restraints:

Airbag system (SRS), seat belts, system diagnostics, component replacement, safety precautions.

Infotainment:

Audiovisual systems, navigation system, driver information center, diagnostics and repair of infotainment components.

Routine Maintenance:

Oil changes, filter replacements (oil, air, cabin), fluid checks and top-offs, tire rotation, spark plug replacement, battery maintenance.

Troubleshooting:

Step-by-step diagnostic procedures for common and complex issues, symptom-based troubleshooting guides, DTC interpretation.

Repair And Rebuild:

Detailed instructions for component removal, disassembly, inspection, repair, reassembly, and installation (e.g., engine components, transmission overhaul, brake caliper replacement).

Component Replacement:

Replacement procedures for all major vehicle systems and components.

Diagnostics:

Advanced diagnostic techniques, use of diagnostic scan tools, interpretation of sensor data, electronic system testing.

Tire And Wheel:

Tire pressure monitoring system (TPMS) service, wheel bearing replacement, tire mounting and balancing procedures, wheel alignment specifications.

Lighting And Accessories:

Headlamp aiming, bulb replacement, power window and seat motor replacement, sunroof operation and repair.

Depth:

Comprehensive (covers basic maintenance to full engine and transmission rebuilds, including electrical diagnostics and bodywork).

Wiring Diagrams:

Detailed electrical wiring diagrams for all systems, including power distribution, ground points, and component connector pinouts.

Special Tools:

Identification and usage of specialized tools required for specific repair procedures.

Torque Specifications:

Precise torque values for all fasteners, bolts, and nuts throughout the vehicle.

Diagnostic Trouble Codes:

Comprehensive list of Diagnostic Trouble Codes (DTCs), their definitions, potential causes, and diagnostic/repair procedures.

📊 Manual Specifications

File Type:

PDF

Searchability:

Likely text-searchable for keywords and phrases.

Printability:

High quality, suitable for printing individual pages, chapters, or the entire manual.

Binding Type:

N/A (Digital Download)

Paper Type:

N/A (Digital Download)

Required Software:

Adobe Reader (or compatible PDF viewer)

⚙️ Engine Specifications

Engine Option 1 Code:

3.6L V6 DI VVT (LP1)

Engine Option 1 Displacement:

3564 cc (217.5 cubic inches)

Engine Option 1 Horsepower:

302 hp @ 6300 rpm

Engine Option 1 Torque:

272 lb-ft @ 4800 rpm

Engine Option 1 Fuel System:

Direct Injection (DI), Sequential Multi-Port Fuel Injection (MPFI)

Engine Option 1 Block Material:

Aluminum

Engine Option 1 Cylinder Head Material:

Aluminum

Engine Option 1 Valvetrain:

DOHC, 4 valves per cylinder, Variable Valve Timing (VVT)

Engine Option 2 Code:

4.6L V8 (Northstar LD8)

Engine Option 2 Displacement:

4600 cc (280.7 cubic inches)

Engine Option 2 Horsepower:

292 hp @ 6300 rpm (estimated for 2009 model year)

Engine Option 2 Torque:

295 lb-ft @ 3700 rpm (estimated for 2009 model year)

Engine Option 2 Fuel System:

Sequential Multi-Port Fuel Injection (MPFI)

Engine Option 2 Block Material:

Aluminum

Engine Option 2 Cylinder Head Material:

Aluminum

Engine Option 2 Valvetrain:

DOHC, 4 valves per cylinder

🔧 Transmission

Transmission Type:

6-speed automatic transmission

Transmission Code:

6L50 (for V6), 6L80 (for V8)

Drive Configuration:

Rear-Wheel Drive (RWD) standard on most models, All-Wheel Drive (AWD) optional on some powertrains.

Transmission Features:

Driver Shift Control (manual shifting capability), adaptive shift control.

Automatic Transmission Fluid:

Dexron VI

📐 Dimensions

Wheelbase:

113.9 inches (2893 mm)

Length:

199.4 inches (5065 mm)

Width:

72.7 inches (1847 mm)

Height:

57.6 inches (1463 mm)

Curb Weight V6 Rwd:

Approx. 3970 lbs (1801 kg)

Curb Weight V8 AWD:

Approx. 4250 lbs (1928 kg)

🛡️ Safety Features

NHTSA Front Impact:

5-Star (for driver and passenger) - 2009 Model

IIHS Side Impact:

Good - 2009 Model

IIHS Rear Impact:

Good - 2009 Model

Active Safety Features:

Anti-lock Braking System (ABS), Traction Control System (TCS), Electronic Stability Control (ESC), StabiliTrak, Brembo performance brakes (optional).

Passive Safety Features:

Frontal airbags (driver and passenger), side-impact airbags (front and rear), curtain airbags (front and rear), active head restraints, seat belt pretensioners.

💡 Technology Features

Infotainment System:

Cadillac User Experience (CUE) was not yet fully integrated; relied on a central touch screen display with DVD-based navigation, AM/FM/CD/MP3 audio system, and optional Bose premium audio.

Connectivity:

Bluetooth for hands-free calling (available), USB port for audio devices (available).

Driver Assistance Features:

Adaptive Cruise Control (optional), front and rear parking assist sensors, rearview camera (optional).

Advanced Features:

Magnetic Ride Control (adaptive damping suspension), heated and ventilated front seats, heated rear seats, remote start, keyless entry and ignition.

🔧 Maintenance

Oil Change Interval:

Refer to oil life monitoring system (typically 7,500-10,000 miles or as indicated by the system).

Engine Air Filter Replacement:

Every 30,000-45,000 miles or as needed based on driving conditions.

Cabin Air Filter Replacement:

Every 15,000-30,000 miles or as needed.

Spark Plug Replacement:

V6: 100,000 miles (iridium plugs); V8: 100,000 miles (iridium plugs).

Transmission Fluid Change:

Initially at 100,000 miles, then typically every 60,000-100,000 miles (check manual for specific guidance, especially for severe use).

Engine Oil Specification:

SAE 5W-30, GM dexos1 (or equivalent approved synthetic).

Coolant Specification:

GM Engineering Standard GMW3420 (Orange-colored, propylene glycol-based, long-life coolant).

Brake Fluid Specification:

DOT 3 or DOT 4

Common Issues V6:

Timing chain tensioner wear, oil leaks from valve covers or oil cooler lines, carbon buildup on intake valves (DI engine), potential for ignition coil failure.

Common Issues V8 Northstar:

Head gasket issues (less common on later iterations but still a concern for some), oil leaks, oil pressure sensor issues, power steering pump leaks.

Common Issues General:

Leaking sunroof drains leading to water ingress in the cabin, HVAC blend door actuator failures, magnetic ride control sensor or strut failures, electronic module failures (e.g., BCM, ECM).

📚 Vehicle History

Cadillac Heritage:

Cadillac, founded in 1902, is a luxury vehicle division of General Motors (GM), renowned for its pioneering spirit in automotive technology and its commitment to American luxury and prestige.

Sts Predecessor:

The STS replaced the Cadillac Seville in the lineup. The 'STS' designation itself was first used on the Seville STS performance variant.

Sts Generation 2:

The 2009 model year represents the second generation of the dedicated STS platform (2005-2011), which debuted in 2005 and received a facelift for the 2008 model year.

Manufacturing Location:

Lansing Grand River Assembly, Lansing, Michigan, USA

🏆 Awards & Recognition

Awards List:

While specific awards for the 2009 model year are less prominently documented, the STS generally received positive reviews for its performance (especially the V8 models), handling, and luxurious interior appointments, contributing to Cadillac's resurgence in the luxury segment during this period.