The Buick Terraza, produced from 2005 to 2009, is a mid-size minivan built on GM's U-body platform, known for its refined ride and spacious interior designed to accommodate up to seven passengers. Offering a comfortable and well-appointed experience, it was engineered with a focus on reliability and family utility. The Terraza was available with a choice of 3.5L or 3.9L V6 engines, paired with a 4-speed automatic transaxle, providing ample power for daily driving and longer journeys. Its design emphasized practicality, including significant cargo capacity and features like available rear-seat entertainment and telematics, positioning it as a capable and versatile option in its segment. This factory service and repair manual provides comprehensive, A-Z coverage for all Buick Terraza models from 2005-2009. It details everything from routine maintenance, fluid specifications, and service intervals to in-depth diagnostic procedures, troubleshooting guides, and step-by-step repair instructions for all major vehicle systems. The manual covers powertrain, chassis, body, and electrical components, including detailed wiring diagrams and specific information relevant to using factory diagnostic tools. This resource is invaluable for owners, mechanics, and technicians seeking to maintain, diagnose, and repair the Terraza with factory-level accuracy and efficiency. 🏷️ Basic Information Identification Make: Buick Model: Terraza Year Range Covered: 2005-2009 Generation Platform: GM U-body minivan platform Codes Internal Platform Code: GMT255 👋 Introduction Market Position Vehicle Segment: Mid-size minivan Competitive Analysis Key Competitors: Dodge Grand Caravan, Chrysler Town & Country, Toyota Sienna, Honda Odyssey, Ford Freestar Key Features Manual Advantage: Vehicle-specific, factory-level detail, all-encompassing coverage, digital format for ease of use and portability. Manual Benefit Diy: Empowers DIY mechanics to perform complex repairs and routine maintenance efficiently, saving time and money. Manual Format Advantage: Single PDF file allows for quick searching, page printing, and digital storage, eliminating the need for physical manuals. 📋 Manual Details Coverage Areas Scope: All models and all repairs A-Z Page Count Estimated Pages: Extensive (specific page count not provided, but implied to be comprehensive) Manual Type Type: Factory Service and Repair Manual Content Type: Diagnostic, repair, maintenance, and specifications Language Language: English Format Digital Format: PDF Software Requirements: Adobe PDF Reader and Winzip (free online) 📖 Manual Coverage Systems Covered Powertrain: Engine (3.5L, 3.9L V6), Control System, Fuel Service, Emission Control, Intake/Exhaust/Cooling, Lube, Ignition, Starting/Charging, Auto Transmission, Manual Transmission (if applicable), Transfer Case (if applicable), Drive Shaft, Differential, Axle Chassis: Suspension, Tire & Wheel, Brake Control, Brake Systems, Parking Brake, Steering Column, Power Steering Body And Electrical: Air Conditioning, Supplemental Restraint System (SRS), Seat Belts, Engine Immobilizer, Cruise Control, Wiper & Washer, Door Locks, Meter/Audio/Visual, Horn, Windshield/Glass/Mirror, Instrument Panel, Seats, Engine Hood/Door, Exterior & Interior, Electrical Systems, Multiplex/CAN Communication Body And Interior: Body panels, doors, windows, locks, seats, interior trim, lighting, wipers, washers, horn, mirrors. Climate Control: HVAC system diagnosis and repair, refrigerant service. Procedures Included Diagnostic Procedures: Troubleshooting guides, diagnostic trouble codes (DTCs), component testing Repair Procedures: Complete step-by-step instructions for disassembly, reassembly, and repair of all major vehicle systems and components. Maintenance Procedures: Routine maintenance tasks, fluid changes, filter replacements, adjustments. Wiring Schematics: Comprehensive electrical wiring diagrams for all vehicle systems. Component Replacement: Detailed instructions for replacing major components like engine, transmission, suspension parts, brake calipers, etc. Technical Depth Depth: Factory level; detailed diagnostics, specifications, and repair procedures used by dealership technicians. Diagnostic Tools: Information relevant to using GM's diagnostic equipment (e.g., Tech 2) for fault code retrieval and module programming. 📊 Manual Specifications File Format Compatibility: Windows Vista (32 & 64-bit), XP, ME, 98, NT, 2000, and Mac OS Download Speed: Fast download Print Quality Printability: All pages printable; allows for enlarged printing of diagrams. Binding Type Binding: N/A (Digital PDF format) Paper Type Paper Type: N/A (Digital PDF format) ⚙️ Engine Specifications Primary Engine Engine Options: 3.5L V6 (GM 3500), 3.9L V6 (GM 3900) Performance Horsepower Torque 3.5L: Approximately 200 hp @ 5200 rpm, 230 lb-ft @ 4000 rpm (figures may vary slightly by model year/tune) Horsepower Torque 3.9L: Approximately 240 hp @ 6000 rpm, 240 lb-ft @ 4400 rpm (figures may vary slightly by model year/tune) Fuel System Fuel Delivery: Electronic Fuel Injection (EFI) Engine Codes Engine Code 3.5L: LX9 (GM 3500 V6) Engine Code 3.9L: LZ8 (GM 3900 V6) 🔧 Transmission Standard Transmission Type: 4-speed automatic transaxle Optional Optional Transmissions: N/A (Only automatic offered in this generation) Features Transmission Fluid Spec: Dexron-VI automatic transmission fluid (ATF) 📐 Dimensions Exterior Wheelbase: Approx. 122.5 inches Length: Approx. 202.4 inches Interior Seating Capacity: 7 passengers (standard) Cargo Max Cargo Volume: Approx. 136.4 cubic feet (with second and third rows folded) Weights Curb Weight: Approx. 4,400 - 4,700 lbs (depending on configuration) Gross Vehicle Weight Rating Gvwr: Approx. 6,000 - 6,200 lbs (varies by configuration) 🛡️ Safety Features Ratings NHTSA Front Impact Driver: 5 Stars (2005-2007 models) NHTSA Front Impact Passenger: 5 Stars (2005-2007 models) NHTSA Side Impact Front Seat:...