🏷️ Basic Information Identification Make: GMC Model: Sonoma Year: 1994 Codes Platform Code: GMT400 (Second Generation) 👋 Introduction Market Position Target Audience: DIY enthusiasts, home mechanics, and professional technicians seeking accurate, dealership-level repair information. Key Features Unique Selling Proposition: Vehicle-specific, factory-original data, comprehensive A-Z coverage, digital format for ease of use and portability. 📋 Manual Details Coverage Areas All Models Trims: Yes, covers all GMC Sonoma models and trims for 1994. Page Count Estimated Page Count: Extensive, typically exceeding 1000 pages for a full factory service manual of this era. Manual Type Type: Factory Service and Repair Manual Language Language: English Format Format: Digital PDF 📖 Manual Coverage Systems Covered Engine: Detailed coverage including diagnostics, overhaul, and specifications for all available engines. Control System: Engine control module (ECM) diagnostics, sensor testing, and programming information. Mechanical: Comprehensive mechanical repairs for all vehicle components. Fuel Service Specifications: Fuel system pressure, component testing, and injector specifications. Emission Control: Diagnosis and repair of emissions-related systems, including catalytic converters and PCV systems. Intake Exhaust Cooling: Cooling system components, radiator, water pump, thermostat, and exhaust system. Lube: Lubrication points, oil type specifications, and oil change procedures. Ignition Starting Charging: Ignition system components, starter motor, alternator, battery testing, and charging system diagnostics. Auto Transmission: Detailed repair and service information for automatic transmissions. Clutch: Service and repair procedures for clutch system components. Manual Transmission: Detailed repair and service information for manual transmissions. Transfer Propeller Shaft: Service and repair of transfer cases and driveshafts. Drive Shaft: Driveshaft universal joint replacement and balancing. Differential: Differential service, fluid type, and overhaul procedures. Axle Suspension: Front and rear suspension component diagnosis, replacement, and alignment specifications. Tire Wheel: Tire pressure specifications, wheel torque, and lug nut patterns. Brake Control: Brake system diagnostics, ABS troubleshooting (if equipped), and proportioning valve adjustments. Brake: Front and rear brake pad replacement, rotor service, brake fluid specifications, and bleeding procedures. Parking Brake: Parking brake adjustment and component replacement. Steering Column: Steering column assembly diagnosis and repair, including tilt mechanisms. Power Steering: Power steering pump, steering gear, and fluid specifications. Air Condition: HVAC system diagnosis, refrigerant type, and component service. Supplemental Restraint System: Airbag system diagnostics and component replacement (SRS). Seat Belt: Seat belt system inspection and repair. Engine Immobilizer: Information on the engine immobilizer system (if factory equipped). Cruise Control: Cruise control system diagnosis and repair. Wiper Washer: Wiper and washer system component service. Door Lock: Power door lock system diagnosis and repair. Meter Audio Visual: Instrument cluster, gauge diagnosis, and audio system integration. Horn: Horn system diagnosis and repair. Windshield Glass Mirror: Windshield replacement, power mirror systems, and glass care. Instrument Panel: Instrument panel removal, installation, and component replacement. Seat: Seat adjustment mechanisms and upholstery care. Engine Hood Door: Hood latch, hinges, and door assembly service. Exterior Interior: Body panel repair, trim removal, and interior component service. Electrical: Comprehensive coverage of the vehicle's electrical system, including fuses, relays, and wiring harnesses. Multiplex Can Communication: Information on multiplex communication systems and CAN bus (if applicable for the era). Procedures Included Maintenance: All scheduled maintenance, fluid checks, filter replacements, and inspections. Diagnostics: Step-by-step diagnostic procedures for common and complex issues across all systems. Repair: Complete repair instructions from minor adjustments to major component overhauls. Wiring Schematics: Detailed, high-resolution wiring diagrams for all electrical circuits. Technical Depth Depth: Factory-level, A-Z coverage, designed for dealership technicians, offering exhaustive detail for all repairs. 📊 Manual Specifications File Format Digital Format: PDF Print Quality Printability: Fully printable, allowing users to print specific pages or sections as needed. Binding Type Binding: N/A (Digital Format) Paper Type Paper Type: N/A (Digital Format) Compatibility Os Compatibility: Windows (Vista 32/64, XP, ME, 98, NT, 2000) and Mac OS. Requirements Software Requirements: Adobe PDF Reader and Winzip (free online). ⚙️ Engine Specifications Primary Engine Engine Options: 2.2L (134 cu in) 4-Cylinder (RPO LQ5), 4.3L (262 cu in) V6 (RPO L35/LB4 - Throttle Body Injection or Multiport Fuel Injection). Performance 4.3L V6 Hp: Approximately 160-165 hp (depending on specific configuration). 4.3L V6 Torque: Approximately 230-235 lb-ft (depending on specific configuration). Fuel System Fuel Delivery: Throttle Body Injection (TBI) or Multiport Fuel Injection (MPFI) depending on engine and trim. 🔧 Transmission Standard Standard Transmission: Manual 5-speed (e.g., NV1500, NV3500). Optional Optional Transmission: Automatic 4-speed (e.g., 4L60E). Features AWD Availability: Available with rear-wheel drive (RWD) or all-wheel drive (AWD) with transfer case options. 📐 Dimensions Weights Curb Weight: Varies by configuration, typically ranging from 3,300 to 3,800 lbs. 💡 Technology Features Infotainment Audio System: Factory AM/FM stereo with cassette player, optional CD player, and speaker configurations vary by trim. Driver Assistance ABS: Anti-lock Braking System (ABS) was optional or standard on certain models/trims for 1994. 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 3,000-7,500 miles or 6-12 months, depending on driving conditions and oil type (refer to specific manual sections...