🏷️ Basic Information Identification Make: GMC Model: Sonoma Year: 2002-2004 Generation Generation: Second Generation (1998-2004) Codes Chassis Code: GMT355 👋 Introduction Market Position Vehicle Segment: Compact Pickup Truck Target Audience: DIY enthusiasts, independent mechanics, fleet owners Competitive Analysis Key Competitors: Ford Ranger, Chevrolet S-10, Toyota Tacoma, Nissan Frontier Key Features Manual Advantage: Provides dealer-level service information at a fraction of the cost; empowers owners to perform their own maintenance and repairs. Digital Format Benefits: Instant download, no shipping costs, accessible on multiple devices, printable for workshop use. 📋 Manual Details Coverage Areas Covered Years: 2002, 2003, 2004 Covered Regions: North America Page Count Estimated Page Count: 1500+ Manual Type Manual Type: Factory Service Manual / Repair Manual Language Language: English Format File Format: PDF 📖 Manual Coverage Systems Covered Engine: Full coverage including 2.2L I4, 3.5L I5 Vortec engines, diagnostics, overhaul, components Transmission: 4-speed automatic (4L60-E, 4L65-E), 5-speed manual (NV1500, NV3500), diagnostics, overhaul, fluid service Drivetrain: Rear-wheel drive (RWD) and 4-wheel drive (4WD) systems, transfer case, drive shafts, axles, differentials Suspension: Front independent suspension (torsion bar), rear leaf springs, shocks, ball joints, control arms, wheel bearings Brakes: Front disc, rear drum (or disc on some models), ABS system, hydraulic components, service and bleeding procedures Steering: Power steering system, steering column, steering gear, alignment specifications Electrical: Complete electrical system, wiring diagrams, lighting, starting and charging system, fuses, relays, diagnostics HVAC: Air conditioning and heating systems, components, refrigerant, diagnostics and repair Interior: Seats, seat belts, airbags (SRS), interior trim, door panels, instrument panel removal and installation Body: Exterior body panels, doors, hood, tailgate, glass, mirrors, bumpers, corrosion protection Emission Control: Emission control systems, catalytic converter, oxygen sensors, EVAP system, diagnostic codes related to emissions Procedures Included Maintenance: Scheduled maintenance, oil changes, filter replacements, fluid checks and top-offs, spark plugs, belts, hoses Diagnostics: Troubleshooting guides, symptom-based diagnostics, diagnostic trouble codes (DTCs), electrical system diagnostics Repair: Component removal, disassembly, inspection, repair, reassembly, and installation for all major systems Overhaul: Detailed procedures for complete engine and transmission overhauls Calibration: Wheel alignment, tire balancing, steering angle sensor calibration (if applicable) Reprogramming: ECM/PCM programming, key fob programming (if applicable) Technical Depth Depth Level: Comprehensive: from basic maintenance to complete engine/transmission rebuilds and advanced electrical diagnostics Detail Level: Detailed step-by-step instructions, hundreds of photos, illustrations, and diagrams Wiring Diagrams: Full-color, system-specific wiring diagrams for all electrical circuits Torque Specifications: Precise torque specifications for all fasteners and critical components Special Tools: Identification and usage of specialized tools required for specific repairs 📊 Manual Specifications File Format File Type: PDF Searchable: Yes (typically) Print Quality Printable: Yes Resolution: High-resolution images and text for clear printing Binding Type Binding: N/A (Digital Download) Paper Type Paper Quality: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Options: 2.2L I4 Vortec (LP2), 3.5L I5 Vortec (L52) 2.2L Lp2 Displacement: 2198 cc (134 cu in) 2.2L Lp2 Horsepower: 115 hp @ 5000 rpm (approx.) 2.2L Lp2 Torque: 130 lb-ft @ 2800 rpm (approx.) 3.5L L52 Displacement: 3538 cc (216 cu in) 3.5L L52 Horsepower: 200 hp @ 5600 rpm (approx.) 3.5L L52 Torque: 225 lb-ft @ 3200 rpm (approx.) Performance Fuel Type: Unleaded Gasoline Fuel System Fuel Delivery: Electronic Fuel Injection (EFI) Ignition System: Distributorless Ignition System (DIS) or Coil-on-Plug (COP) 🔧 Transmission Standard Standard Transmission: 5-speed manual (NV1500 on 2.2L, NV3500 on 3.5L) Optional Optional Transmission: 4-speed automatic (4L60-E, 4L65-E) Features Automatic Features: Electronic controls, overdrive Manual Features: Overdrive gear 📐 Dimensions Exterior Body Styles: Regular Cab, Extended Cab Bed Lengths: Standard Bed (approx. 73 inches), Long Bed (approx. 86 inches) Weights Curb Weight Range: 3,000 - 3,800 lbs (approx., varies by configuration) Towing Capacity: Up to 5,300 lbs (with proper equipment and configuration) 🛡️ Safety Features Ratings NHTSA Ratings: Mixed; varies by specific test and model year, generally average for the segment Active Features ABS: Anti-lock Braking System (ABS) available on most models Passive Features Airbags: Driver and front passenger airbags (SRS) Seat Belts: Three-point seat belts for all occupants 💡 Technology Features Infotainment Audio System: AM/FM stereo with CD player or cassette player; optional premium sound system Speakers: Typically 4 or 6 speakers Driver Assistance Cruise Control: Available on most models Connectivity Power Outlets: 12V accessory power outlet 🔧 Maintenance Service Intervals Oil Change Interval: Every 5,000 to 7,500 miles or 6 months, depending on oil type and driving conditions (refer to manual for specifics) Tire Rotation: Every 5,000 to 7,500 miles Coolant Flush: Every 30,000 to 50,000 miles or 2-5 years Fluid Specifications Engine Oil: API SJ or higher; SAE 5W-30 (preferred for both engines, consult manual for temperature variations) Transmission Fluid Auto: Dexron-III (or equivalent compatible fluid) Transmission Fluid Manual: GL-4 gear oil, SAE 75W-90 Coolant: Ethylene glycol based, GM specification 6043M (Orange) Known Issues Common Problems: Ignition coil failures, fuel pump issues, ABS sensor problems, catalytic converter failure,...