🏷️ Basic Information Identification Make: Chevrolet Model: S10 Year: 1990 Codes Chassis Code: GMT400 (First Generation) 👋 Introduction Market Position Market Position: Targeted at DIY enthusiasts and professional mechanics seeking factory-level repair information for the 1990 Chevrolet S10. Competitive Analysis Competitive Analysis: Offers a significant advantage over outdated printed manuals in terms of accessibility, searchability, and cost-effectiveness. Licensed OE information ensures accuracy and completeness. Key Features Key Features: Officially licensed, factory-derived information, instant online access, compatible with all devices, comprehensive coverage, cost savings for DIY repairs. 📋 Manual Details Coverage Areas Coverage Areas: Engine, Transmission, Drivetrain, Suspension, Steering, Brakes, Electrical System, HVAC, Body, Maintenance, Troubleshooting, Diagnostics, Wiring Diagrams Page Count Page Count: Comprehensive (exact number not specified, but described as full service and repair information) Manual Type Manual Type: Service and Repair Manual Software Language Language: English Format Format: Digital Download (PDF) 📖 Manual Coverage Systems Covered Systems Covered: Engine Mechanical, Engine Performance, Fuel System, Ignition System, Cooling System, Lubrication System, Exhaust System, Transmission (Manual & Automatic), Clutch, Drive Axles, Transfer Case (4WD), Suspension (Front & Rear), Steering System, Power Steering, Brakes (Front & Rear, ABS), Wheels, Tires, Electrical System (Charging, Starting, Ignition, Lighting, Instrumentation, Body Controls, Powertrain Control), HVAC (Heating, Ventilation, Air Conditioning), Body and Frame, Interior Components, Exterior Components, Diagnostic Trouble Codes (DTCs) Procedures Included Procedures Included: Routine Maintenance, Scheduled Maintenance, Engine Overhaul and Rebuilds, Transmission Service and Rebuilds, Brake System Repair, Suspension and Steering Alignment and Replacement, Electrical System Troubleshooting and Repair, HVAC System Service, Body Panel Repair and Replacement, Diagnostic Procedures, Component Testing, Wiring Harness Repair, Fluid Changes and Flushes, Component Removal and Installation Technical Depth Technical Depth: Factory-derived OE materials, covering everything from basic maintenance to complete overhauls and advanced diagnostics. 📊 Manual Specifications File Format File Format: PDF Download Print Quality Print Quality: High-resolution, designed for clear viewing and printing. Binding Type Binding Type: Not Applicable (Digital) Paper Type Paper Type: Not Applicable (Digital) ⚙️ Engine Specifications Primary Engine Primary Engine: 2.5L (151 cid) 'Iron Duke' I4 (L38) Optional Engine 1 Optional Engine 1: 4.3L (262 cid) V6 (LB4) Performance I4 Horsepower I4: 105 hp @ 4000 rpm (approx.) Torque I4: 133 lb-ft @ 2000 rpm (approx.) Performance V6 Horsepower V6: 160 hp @ 4000 rpm (approx.) Torque V6: 230 lb-ft @ 2000 rpm (approx.) Fuel System Fuel System: Throttle Body Injection (TBI) Bore Stroke I4 Bore Stroke I4: 3.875 in x 3.250 in Bore Stroke V6 Bore Stroke V6: 4.000 in x 3.480 in Compression Ratio I4 Compression Ratio I4: 8.7:1 Compression Ratio V6 Compression Ratio V6: 8.3:1 🔧 Transmission Standard Transmission I4 Standard Transmission I4: 4-speed Manual Optional Transmission I4 V6 Optional Transmission I4 V6: 4-speed Automatic (THM-700R4 / 4L60) Optional Transmission V6 Optional Transmission V6: 5-speed Manual Features Features: Lock-up torque converter on automatic transmissions for improved fuel economy. 📐 Dimensions Exterior Wheelbase Std Exterior Wheelbase Std: 118.0 inches Exterior Wheelbase Ext Exterior Wheelbase Ext: 132.0 inches Exterior Length Std Cab Exterior Length Std Cab: 196.5 inches Exterior Length Ext Cab Exterior Length Ext Cab: 210.5 inches Weights Curb Approx Weights Curb Approx: 3,000 - 4,000 lbs (depending on configuration) 🛡️ Safety Features Ratings Ratings: NHTSA Crash Test Data for 1990 models may vary by configuration. Consult specific regulatory databases for detailed ratings. Active Features Active Features: Anti-lock Braking System (ABS) available on rear wheels (RABS - Rear Wheel Anti-lock System). Passive Features Passive Features: Lap and shoulder belts, padded dashboard and steering wheel hub, energy-absorbing steering column. 💡 Technology Features Infotainment Infotainment: Basic AM/FM stereo radio, optional cassette player, and power antenna. Driver Assistance Driver Assistance: Limited; primarily RABS (Rear Wheel Anti-lock System) on some models. Connectivity Connectivity: None (no provisions for external media or modern connectivity). 🔧 Maintenance Service Intervals Oil Service Intervals Oil: Every 3,000 miles or 3 months (typically for conventional oil). Service Intervals Air Filter Service Intervals Air Filter: Check every 15,000 miles, replace as needed. Service Intervals Spark Plugs Service Intervals Spark Plugs: Recommended replacement at 30,000-60,000 miles depending on plug type. Fluid Specifications Engine Oil Fluid Specifications Engine Oil: API SG or SH; SAE 5W-30 recommended for most conditions (check owner's manual for specific viscosity). Fluid Specifications Coolant Fluid Specifications Coolant: Ethylene glycol based, meeting GM specification 1825M (typically a green coolant). Fluid Specifications Brake Fluid Fluid Specifications Brake Fluid: DOT 3 Fluid Specifications Transmission Auto Fluid Specifications Transmission Auto: Dexron-III (GM specification) Fluid Specifications Transmission Manual Fluid Specifications Transmission Manual: GL-4 gear oil (e.g., SAE 75W-90) Known Issues Tbi Clogging Known Issues Tbi Clogging: Throttle Body Injection (TBI) units can become clogged with carbon deposits, leading to rough idling and poor performance. Cleaning is often required. Known Issues Rear Main Seal Known Issues Rear Main Seal: Potential for rear main seal leaks, especially on higher mileage V6 engines. Known Issues Suspension Wear Known...