Market Position:
Targeted at DIY enthusiasts and professional mechanics seeking factory-level repair information for the 1990 Chevrolet S10.
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Offers a significant advantage over outdated printed manuals in terms of accessibility, searchability, and cost-effectiveness.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:
Officially licensed, factory-derived information, instant online access, compatible with all devices, comprehensive coverage, cost savings for DIY repairs.
Coverage Areas:
Engine, Transmission, Drivetrain, Suspension, Steering, Brakes, Electrical System, HVAC, Body, Maintenance, Troubleshooting, Diagnostics, Wiring Diagrams
Page Count:
Comprehensive (exact number not specified, but described as full service and repair information)
Manual Type:
Service and Repair Manual Software
Format:
Digital Download (PDF)
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:
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:
Factory-derived OE materials, covering everything from basic maintenance to complete overhauls and advanced diagnostics.
Primary Engine:
2.5L (151 cid) 'Iron Duke' I4 (L38)
Optional Engine 1:
4.3L (262 cid) V6 (LB4)
Horsepower I4:
105 hp @ 4000 rpm (approx.)
Torque I4:
133 lb-ft @ 2000 rpm (approx.)
Horsepower V6:
160 hp @ 4000 rpm (approx.)
Torque V6:
230 lb-ft @ 2000 rpm (approx.)
Fuel System:
Throttle Body Injection (TBI)
Bore Stroke I4:
3.875 in x 3.250 in
Bore Stroke V6:
4.000 in x 3.480 in
Compression Ratio I4:
8.7:1
Compression Ratio V6:
8.3:1
Standard Transmission I4:
4-speed Manual
Optional Transmission I4 V6
Optional Transmission I4 V6:
4-speed Automatic (THM-700R4 / 4L60)
Optional Transmission V6:
5-speed Manual
Features:
Lock-up torque converter on automatic transmissions for improved fuel economy.
Ratings:
NHTSA Crash Test Data for 1990 models may vary by configuration. Consult specific regulatory databases for detailed ratings.
Active Features:
Anti-lock Braking System (ABS) available on rear wheels (RABS - Rear Wheel Anti-lock System).
Passive Features:
Lap and shoulder belts, padded dashboard and steering wheel hub, energy-absorbing steering column.
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 Issues Suspension Wear:
Ball joints, tie rod ends, and bushings in the front suspension can wear out over time, leading to steering looseness and noise.
Known Issues Exhaust Rust
Known Issues Exhaust Rust:
Due to age, exhaust components (muffler, pipes) are susceptible to rust and corrosion.
Brand Heritage:
Chevrolet has a long history of producing reliable trucks and utility vehicles since the early 20th century.
Model Evolution:
The 1990 S10 marked the introduction of the second generation (GMT400 platform), featuring a more rounded and aerodynamic design compared to its predecessor. It offered extended cab configurations for the first time.
Production:
The S10 was produced by Chevrolet from 1982 to 2004 in the US. The GMT400 platform for the S10 and its GMC counterpart, the Sonoma, was produced from 1982 to 1997.
