The 2015 Buick Regal is a refined mid-size sedan engineered for a comfortable and engaging driving experience. As part of its fifth generation, built on the global A platform and utilizing the GM Epsilon II architecture, the Regal offers a premium American alternative in its segment. It is known for its potent turbocharged engine options, including a 2.0L turbocharged inline-four producing 259 horsepower and 295 lb-ft of torque, and a 2.4L inline-four with eAssist technology for enhanced fuel economy. Available with all-wheel drive, the Regal combines a sophisticated interior design with advanced technology and a smooth, quiet ride, making it a compelling choice for discerning drivers.
This comprehensive workshop service repair manual provides detailed information for the 2015 Buick Regal, covering all models, engines, trims, and transmissions. Within its extensive pages, you will find step-by-step instructions for maintenance procedures, including oil changes, filter replacements, and fluid services, along with guidance on component repair, diagnostics, and troubleshooting for all major systems. The manual covers powertrain, chassis, body and interior, and electrical systems, offering in-depth technical specifications, wiring diagrams, and diagnostic trouble code explanations. This resource is essential for owners and technicians seeking to maintain the performance, reliability, and safety of their Buick Regal.
Market Segment:
Mid-size Sedan
Generation Designation:
Fifth Generation (Global A Platform)
Platform Code:
GM Epsilon II
Positioning:
The Buick Regal 2015 is positioned as a premium mid-size sedan offering a blend of comfort, performance, and technology, often seen as a more refined American alternative to European sport sedans.
Key Competitors:
Ford Fusion, Chevrolet Malibu, Toyota Camry, Honda Accord, Volkswagen Passat, Acura TLX.
Vehicle Appeal:
Comfortable ride, potent turbocharged engines (optional), upscale interior design, available AWD.
All Models Engines Trims Transmissions:
Yes
Estimated Page Count:
Extensive (exact count not provided, but described as 'complete workshop service repair manual')
Type:
Complete Workshop Service Repair Manual
Format:
Downloadable Digital File (PDF compatible)
Powertrain:
Engine, Transmission, Drivetrain (Front-Wheel Drive/All-Wheel Drive)
Chassis:
Suspension, Steering, Brakes, Wheels & Tires
Body And Interior:
Body Panels, Doors, Seats, HVAC, Trim
Electrical And Electronics:
Wiring Diagrams, Lighting, Instrumentation, Infotainment, ECUs
Diagnostics And Troubleshooting:
Diagnostic Trouble Codes (DTCs), Fault Finding Procedures
Maintenance:
Scheduled Maintenance, Fluid Changes, Filter Replacements, Inspections
Repair:
Engine Repair, Transmission Overhaul, Brake System Repair, Suspension Component Replacement, Electrical Component Repair
Diagnostics:
Step-by-step troubleshooting guides for various systems
Installation And Replacement:
Component removal, installation, and calibration procedures
Depth:
Comprehensive (A-Z coverage, including detailed step-by-step instructions and pictures)
Compatibility:
All PC & MAC Computers, tablets, mobile phones
Required Software:
Adobe Reader (or compatible PDF viewer)
Printable:
Yes (individual pages, chapters, or entire manual)
Binding Type Digital:
N/A (Digital Download)
Paper Type Digital:
N/A (Digital File)
Engine 2 4L I4 Lx9:
2.4L DOHC VVT DI 4-cylinder (eAssist technology for enhanced fuel economy).
Engine 2 0L I4 Turbo Ltg:
2.0L DOHC VVT DI Turbocharged 4-cylinder
2 4L Horsepower:
182 hp @ 6700 rpm (gasoline only)
2 4L Torque:
172 lb-ft @ 4900 rpm (gasoline only)
2 0L Turbo Horsepower:
259 hp @ 5300 rpm
2 0L Turbo Torque:
295 lb-ft @ 2500-5000 rpm
Injection Type:
Direct Injection (DI)
Fuel Type:
Unleaded Gasoline
Engine Codes Covered:
Likely includes LTG (2.0T) and LX9 (2.4L with eAssist) variants.
Transmission 2 4L:
6-speed automatic with Driver Shift Control (eAssist)
Transmission 2 0T:
6-speed automatic with Driver Shift Control
AWD Availability:
Available with the 2.0L Turbocharged engine.
Driver Shift Control:
Allows manual gear selection.
Length:
Approx. 190.2 inches (4831 mm)
Width:
Approx. 73.1 inches (1857 mm)
Height:
Approx. 58.4 inches (1483 mm)
Front Headroom:
Approx. 38.8 inches (985 mm)
Rear Legroom:
Approx. 36.8 inches (935 mm)
Trunk Volume:
Approx. 15.1 cubic feet (427 liters)
Curb Weight Base:
Approx. 3600 lbs (1633 kg) for 2.4L eAssist FWD.
Curb Weight Turbo AWD:
Approx. 3800 lbs (1724 kg) for 2.0T AWD.
NHTSA Overall Rating:
5-Star (for 2015 models with specific configurations)
Brake System:
Four-wheel disc brakes with ABS, Electronic Brake-force Distribution (EBD), Brake Assist (BA).
Stability Control:
StabiliTrak electronic stability control system.
Traction Control:
Traction Control System (TCS).
Airbags:
Frontal, side-impact, and curtain airbags; driver's knee airbag.
Seat Belts:
3-point front and rear seat belts with pretensioners.
Child Seat Anchors:
LATCH (Lower Anchors and Tethers for CHildren) system.
System Name:
Buick IntelliLink infotainment system.
Features:
Touchscreen display, Bluetooth connectivity for audio and phone, USB ports, Pandora and Stitcher app integration.
Available Features:
Lane Departure Warning, Forward Collision Alert, Rear Cross-Traffic Alert, Blind Spot Monitoring, Adaptive Cruise Control.
Smartphone Integration:
Basic integration via Bluetooth and USB for audio and calls.
Keyless Access Start:
Keyless ignition and push-button start standard on most trims.
Oil Change Interval:
Typically every 7,500 miles (12,000 km) or 6 months, depending on driving conditions and oil type used. Refer to manual for specific oil life monitoring system recommendations.
Tire Rotation Interval:
Every 7,500 miles (12,000 km) or as recommended by tire wear indicators.
Air Filter Replacement:
Check every 15,000-22,500 miles (24,000-36,000 km), replace as needed based on condition.
Coolant Flush:
Initial flush at 5 years or 100,000 miles (160,000 km), then every 5 years or 100,000 miles thereafter (Dex-Cool coolant).
Engine Oil Type:
SAE 0W-30 (API SN, ILSAC GF-5)
Engine Oil Capacity:
Approx. 4.7 quarts (4.4 liters) for 2.4L, 5.0 quarts (4.7 liters) for 2.0T.
Transmission Fluid Type:
Dexron VI Automatic Transmission Fluid.
Coolant Type:
GM P/N 12346290 (Dex-Cool) Orange Extended Life Antifreeze/Coolant.
Common Complaints:
Intermittent electrical gremlins, potential for turbocharger issues on the 2.0T (though generally robust), some reports of catalytic converter issues, and occasional HVAC system problems.
Oil Consumption 2 0T:
Some owners reported higher-than-expected oil consumption, often related to PCV system or piston ring wear on earlier models of this generation.
Buick Legacy:
Buick, founded in 1899, is one of America's oldest automotive brands, known for its focus on comfort, quietness, and premium features.
Regal Lineage:
The Regal nameplate has been used by Buick since the 1970s, evolving through various segments from personal luxury coupes to performance sedans. The 2015 model represents the fifth generation, based on a global platform.
Manufacturing Location:
Oshawa, Ontario, Canada (for North American market).
Safety Award:
The 2015 Buick Regal received a 5-Star Overall Safety Rating from the National Highway Traffic Safety Administration (NHTSA).
IIHS Top Safety Pick:
Likely received 'Top Safety Pick' or 'Top Safety Pick+' from the Insurance Institute for Highway Safety (IIHS), depending on specific equipment and testing results.
