🏷️ Basic Information Identification Make: GMC Model: Sonoma Year: 2002 Codes Platform: GMT325 Generation Generation: Second Generation (1998-2004) 👋 Introduction Market Position Target Audience: DIY enthusiasts, independent repair shops, and professional technicians. Competitive Analysis Advantage: More convenient and cost-effective than traditional printed manuals; instant online access. Key Features Software Provider: RepairSurge Content Source: Licensed OE (Original Equipment) materials. 📋 Manual Details Coverage Areas All Systems: Yes Specific Systems: Engine, Transmission, Drivetrain, Brakes, Steering, Suspension, Electrical System, HVAC, Body, Emissions, Diagnostics, Maintenance Page Count Estimated Page Count: Thousands (digital format, content-rich) Manual Type Type: Official Service and Repair Manual Software Language Language: English Format Format: Online Software (Web Browser Accessible) 📖 Manual Coverage Systems Covered Engine: Detailed diagnosis, repair, overhaul procedures for all available 2002 Sonoma engines. Transmission Drivetrain: Coverage of manual and automatic transmissions, 2WD/4WD systems, driveline components, axle repair. Brakes: Disc and drum brake systems, ABS, hydraulic system diagnosis and repair. Steering Suspension: Power steering, steering columns, front/rear suspension components, alignment procedures, shock absorbers, ball joints. Electrical Lighting: Wiring diagrams, fuse box locations, component testing, lighting systems, charging system, starting system. HVAC: Heating, ventilation, and air conditioning system diagnosis, refrigerant handling, component replacement. Body Interior: Body panel repair, door mechanisms, interior trim, glass replacement, bumpers, upholstery. Procedures Included Maintenance: Oil changes, filter replacements, fluid checks, tune-ups, lubrication schedules, tire rotation. Troubleshooting: Diagnostic trouble code (DTC) interpretation, symptom-based troubleshooting guides. Repair Rebuild: Complete engine rebuilds, transmission overhauls, brake system overhauls, suspension component replacement. Diagnostics: Advanced diagnostic procedures for all major systems, including powertrain control module (PCM) diagnostics. Technical Depth Depth: Factory-level technical information, including specifications, torque values, diagnostic procedures, and step-by-step repair instructions. 📊 Manual Specifications File Format Accessibility: Web-based, accessible via any modern web browser on PC, laptop, smartphone, or tablet. Print Quality Searchability: Fully searchable text content for quick information retrieval. Binding Type Access Duration: 1-Year Subscription (extendable) Paper Type Licensing: Officially Licensed, OE Material Derived ⚙️ Engine Specifications Primary Engine Engine Options: 2.2L I4 (LP4), 3.5L I5 (L52), 4.3L V6 (X30) Performance 2.2L Lp4 Horsepower: 113 hp @ 5200 rpm 2.2L Lp4 Torque: 132 lb-ft @ 3600 rpm 3.5L L52 Horsepower: 170 hp @ 4800 rpm 3.5L L52 Torque: 190 lb-ft @ 3600 rpm 4.3L X30 V6 Horsepower: 190 hp @ 4400 rpm 4.3L X30 V6 Torque: 250 lb-ft @ 2800 rpm Fuel System Fuel Delivery: Multi-port Fuel Injection (MPFI) Recommended Fuel: 87 Octane Unleaded Gasoline 🔧 Transmission Standard Standard Transmission: 5-speed Manual (RPO MV5) Optional Optional Transmission: 4-speed Automatic (RPO 4L60-E) Features Drivetrain Options: 2WD (Rear-Wheel Drive), 4WD (Four-Wheel Drive) 📐 Dimensions Exterior Wheelbase Regular Cab: 111.0 inches Wheelbase Extended Cab: 123.0 inches Bed Lengths: Short (6.2 ft), Long (7.2 ft) Weights Curb Weight Range: Approx. 3,500 - 4,200 lbs 🛡️ Safety Features Ratings NHTSA Rollover Rating: 4-star (driver), 4-star (passenger) for 2WD models (typical) Active Features ABS: Available (standard on some trims, optional on others) Passive Features Airbags: Driver and passenger front airbags 💡 Technology Features Infotainment Audio System: Factory AM/FM stereo with CD player or cassette tape player depending on trim and options. Optional premium sound systems available. Driver Assistance Cruise Control: Available on most trims. Connectivity Onstar: Optional OnStar system available on some models. 🔧 Maintenance Service Intervals Oil Change Interval: Every 3,000-7,500 miles or 6-12 months, depending on oil type and driving conditions (refer to manual for specifics). Engine Coolant Flush: Typically every 30,000-60,000 miles or 2-4 years. Spark Plug Replacement: Varies by engine: 2.2L I4 (approx. 60k-100k miles), 3.5L I5/4.3L V6 (approx. 100k miles with platinum/iridium plugs). Fluid Specifications Engine Oil Type: API Service SJ, SL, or SM; SAE 5W-30 recommended for most conditions (check manual for specific temperature ranges). Transmission Fluid Automatic: Dexron III H/G or equivalent (e.g., Dexron-VI may be backward compatible, verify). Transmission Fluid Manual: GM Synchromesh or equivalent for manual transmissions (check manual for specific weight). Coolant Type: GM P/N 12378515 (Orange) or equivalent, ethylene glycol-based, long-life coolant. Brake Fluid Type: DOT 3 Known Issues Heater Core Leaks: Common issue on many GM trucks of this era, often requiring dashboard removal for replacement. Intake Manifold Gaskets: Can develop leaks, especially on V6 engines, leading to coolant or vacuum leaks. Rear Main Seal Leaks: Can occur over time, particularly on higher mileage vehicles. Clutch Master Cylinder Leaks: Manual transmission models may experience leaks from the clutch hydraulic system. 📚 Vehicle History Brand Heritage Gm Truck Lineage: GMC has a long history of producing reliable trucks and commercial vehicles. Model Evolution Sonoma History: The Sonoma was GMC's compact pickup truck, positioned below the Sierra. It shared its platform with the Chevrolet S-10. Production Production Years: 1994-2004 🏆 Awards & Recognition Recognitions Truck Of The Year: While not specifically for the 2002 Sonoma, the GMT325 platform (shared with S-10) has historically been recognized for its utility and value in the...