This comprehensive Cadillac STS Workshop Service Repair Manual covers all models and repairs for the 2004-2007 model years. It provides detailed instructions, diagrams, illustrations, wiring schematics, and specifications to help you maintain, service, diagnose, and repair your vehicle.

This manual is the exact same information used by technicians at dealerships, ensuring you have access to the most accurate and up-to-date information. It includes step-by-step instructions, making even complex repairs easy to understand. You'll find information on a wide range of topics including:

* **Maintenance:** Regular maintenance schedules, fluid capacities, and filter replacement procedures.
* **Engine:** Detailed information on engine components, operation, troubleshooting, and repair procedures.
* **Control System:** In-depth coverage of engine control systems, including electronic throttle control, fuel injection, and emissions systems.
* **Mechanical:** Comprehensive repair information for transmission, suspension, drivetrain, and brakes.
* **Fuel Service Specifications:** Detailed information on fuel system components, including fuel injectors, fuel pumps, and fuel lines.
* **Emission Control:** Diagnostics and repair procedures for emission control systems, including catalytic converters and oxygen sensors.
* **Intake Exhaust Cooling:** Information on intake and exhaust systems, including manifold systems, turbochargers, and cooling systems.
* **Lube:** Specifications for lubricants and fluids used in your vehicle.
* **Ignition Starting Charging:** In-depth coverage of ignition, starting, and charging systems, including spark plugs, ignition coils, and battery systems.
* **Auto Transmission Clutch:** Detailed information on automatic transmission components, operation, and repair procedures.
* **Manual Transmission:** Repair information for manual transmissions, including clutch systems, gearboxes, and shift mechanisms.
* **Transfer Propeller Shaft:** Information on transfer cases and propeller shafts, including operation and repair procedures.
* **Drive Shaft:** Detailed information on drive shafts, including components, operation, and repair procedures.
* **Differential:** Repair information for differentials, including axle shafts, gears, and bearings.
* **Axle Suspension:** Comprehensive repair information for suspension systems, including struts, shocks, springs, and control arms.
* **Tire & Wheel:** Specifications and procedures for tire and wheel maintenance and repair.
* **Brake Control:** In-depth coverage of brake control systems, including anti-lock brakes (ABS) and electronic stability control (ESC).
* **Brake:** Detailed information on brake components, operation, and repair procedures.
* **Parking Brake:** Repair information for parking brake systems, including cables, shoes, and drums.
* **Steering Column:** Detailed information on steering columns, including components, operation, and repair procedures.
* **Power Steering:** Repair information for power steering systems, including pumps, hoses, and steering racks.
* **Air Condition:** Comprehensive information on air conditioning systems, including refrigerant charging procedures, component repair, and troubleshooting.
* **Suppl Restraint System:** Detailed information on supplemental restraint systems, including airbags, seat belts, and pretensioners.
* **Seat Belt:** Repair information for seat belts, including mechanisms, buckles, and retractors.
* **Engine Immobilizer:** Information on engine immobilizer systems, including operation and troubleshooting procedures.
* **Cruise Control:** Repair information for cruise control systems, including operation and troubleshooting procedures.
* **Wiper & Washer:** Detailed information on wiper and washer systems, including motor operation, blade replacement, and fluid system maintenance.
* **Door Lock:** Repair information for door lock systems, including mechanical and electronic components.
* **Meter Audio/Visual:** Information on instrument cluster operation, warning lights, and audio systems.
* **Horn:** Repair information for horn systems, including electrical components and operation.
* **Windshield/Glass Mirror:** Information on windshield and mirror replacement procedures.
* **Instrument Panel:** Repair information for instrument panels, including components, operation, and repair procedures.
* **Seat:** Detailed information on seat components, operation, and repair procedures.
* **Engine Hood/ Door:** Repair information for engine hood and door components, including hinges, latches, and seals.
* **Exterior & Interior:** Information on exterior and interior components, including body panels, trim, and upholstery.
* **Electrical:** Comprehensive information on electrical systems, including wiring diagrams, component repair, and troubleshooting procedures.
* **Multiplex/ Can Communication:** Detailed information on multiplex and CAN communication systems used in your vehicle.

This manual is designed to be easily accessible, allowing you to find the information you need quickly and efficiently.

The Cadillac STS, a mid-size luxury sedan produced from 2004 to 2011, marked a significant shift in Cadillac’s design language and performance aspirations. The STS, standing for "Sedan Touring Sedan," was a replacement for the Seville and offered a refined blend of elegance and sporty handling. The second generation, spanning from 2004 to 2007, featured a sleek, angular exterior design, characterized by a prominent grille, sculpted hood, and distinctive headlights. The interior boasted premium materials, such as leather upholstery and wood trim, alongside advanced features like a Bose sound system, a navigation system, and a sunroof. Under the hood, the STS came equipped with two powerful engine options: a 3.6-liter V6 generating 255 horsepower and a 4.6-liter Northstar V8 producing 320 horsepower. The STS was praised for its responsive handling, comfortable ride, and luxurious interior, offering a compelling alternative to European competitors like the BMW 5 Series and Mercedes-Benz E-Class.

The Cadillac STS Complete Workshop Service Repair Manual for the 2004-2007 model years provides comprehensive technical information and step-by-step instructions for all aspects of servicing, repairing, and maintaining the vehicle. The manual covers a wide range of topics, including engine and transmission systems, suspension and steering, brakes, electrical systems, bodywork, and more. It features detailed diagrams, illustrations, and clear explanations to guide both professional mechanics and knowledgeable DIY enthusiasts. With its comprehensive coverage, this manual serves as an indispensable resource for anyone seeking to understand and work on their 2004-2007 Cadillac STS. Whether tackling routine maintenance tasks like oil changes and tire rotations or dealing with more complex repairs, this manual empowers owners and technicians with the knowledge and tools necessary to keep their STS running smoothly and reliably.