This comprehensive 2004 Buick Regal Service and Repair Manual provides detailed instructions, diagrams, illustrations, wiring schematics, and specifications for all models and repairs. It covers everything from basic maintenance to advanced repairs, empowering you to service and repair your vehicle with ease.

The manual is organized in a user-friendly format, allowing you to quickly locate the information you need. It includes detailed sections on:

* **Maintenance:** Routine maintenance procedures, including oil changes, filter replacements, and fluid checks.
* **Engine:** In-depth coverage of engine systems, including components, operation, troubleshooting, and repair procedures.
* **Control System:** Detailed information on electronic control systems, sensors, actuators, and diagnostics.
* **Mechanical:** Comprehensive sections on transmission, drivetrain, suspension, steering, and braking systems.
* **Fuel Service Specifications:** Specifications for fuel systems, including injectors, pumps, and lines.
* **Emission Control:** Detailed information on emissions systems, including catalytic converters, oxygen sensors, and exhaust systems.
* **Intake Exhaust Cooling:** Coverage of intake and exhaust manifolds, cooling systems, and related components.
* **Lube:** Lubrication specifications, including oil types, capacities, and recommended intervals.
* **Ignition Starting Charging:** Information on ignition systems, starting systems, and charging systems.
* **Auto Transmission Clutch:** Repair procedures and specifications for automatic transmissions.
* **Manual Transmission:** Detailed information on manual transmissions, including shifting mechanisms and clutch systems.
* **Transfer Propeller Shaft:** Coverage of transfer cases, propeller shafts, and related components.
* **Drive Shaft:** Information on drive shafts, universal joints, and axle shafts.
* **Differential:** Detailed information on differentials, including operation, repair, and maintenance.
* **Axle Suspension:** Comprehensive coverage of axles, suspension components, and related systems.
* **Tire & Wheel:** Specifications and procedures for tire and wheel maintenance and replacement.
* **Brake Control:** Detailed information on brake control systems, including anti-lock braking systems (ABS).
* **Brake:** Complete coverage of brake systems, including calipers, rotors, pads, and hydraulic systems.
* **Parking Brake:** Information on parking brake systems, including components and operation.
* **Steering Column:** Detailed information on steering columns, including components, operation, and repair.
* **Power Steering:** Coverage of power steering systems, including pumps, hoses, and steering gear.
* **Air Condition:** Comprehensive coverage of air conditioning systems, including components, operation, and refrigerant handling.
* **Suppl Restraint System:** Information on supplemental restraint systems, including airbags and seatbelt pretensioners.
* **Seat Belt:** Detailed information on seatbelt systems, including components, operation, and adjustments.
* **Engine Immobilizer:** Coverage of engine immobilizer systems, including keyless entry and anti-theft systems.
* **Cruise Control:** Information on cruise control systems, including components and operation.
* **Wiper & Washer:** Detailed information on wiper and washer systems, including motors, blades, and fluid levels.
* **Door Lock:** Coverage of door lock systems, including manual and power locks.
* **Meter Audio/Visual:** Information on instrument panels, gauges, and warning lights.
* **Horn:** Detailed information on horn systems, including operation and troubleshooting.
* **Windshield/Glass Mirror:** Specifications and procedures for windshield, glass, and mirror replacement.
* **Instrument Panel:** Coverage of instrument panels, including components and operation.
* **Seat:** Detailed information on seats, including adjustment mechanisms and upholstery.
* **Engine Hood/ Door:** Information on engine hood and door systems, including latches and hinges.
* **Exterior & Interior:** Detailed information on exterior and interior trim, including body panels, lights, and upholstery.
* **Electrical:** Comprehensive coverage of electrical systems, including wiring diagrams, troubleshooting, and repair procedures.
* **Multiplex/ Can Communication:** Information on multiplex and CAN communication systems, including diagnostic procedures.

This manual provides you with the knowledge and tools necessary to maintain, service, diagnose, and repair your 2004 Buick Regal, saving you time and money.

The 2004 Buick Regal, a mid-size sedan, marked the end of an era for the nameplate. After a successful run spanning decades, the Regal was discontinued in the United States following the 2004 model year. The 2004 Regal offered a comfortable and refined driving experience, appealing to buyers seeking a balance between performance and practicality. Under the hood, the Regal was powered by a 3.8-liter V6 engine, generating 200 horsepower and 225 lb-ft of torque. This engine, coupled with a four-speed automatic transmission, provided adequate acceleration and smooth operation. The Regal was available in two trim levels: the standard Regal and the upscale GS. The GS, with its sport-tuned suspension and larger wheels, catered to those seeking a slightly more spirited driving experience.

Despite its discontinuation, the 2004 Buick Regal remains a reliable and sought-after vehicle. Its enduring popularity is perhaps a testament to the enduring appeal of its classic styling, comfortable interior, and robust mechanicals. While the Regal may lack some of the modern amenities found in newer vehicles, its simple design and straightforward engineering make it a relatively easy car to maintain and repair. The 2004 Buick Regal Service and Repair Manual is an invaluable resource for owners and mechanics alike, providing detailed information on every aspect of the vehicle, from routine maintenance procedures to complex repairs. The manual's comprehensive coverage ensures that owners can keep their Regals running smoothly for years to come, preserving a piece of automotive history.