Target Audience:
DIY mechanics, home repair enthusiasts, professional technicians seeking reference.
Value Proposition:
Enables users to perform their own repairs, saving significant costs compared to dealership or independent shop labor.
Instruction Style:
Easy-to-follow step-by-step instructions with clear pictures.
Delivery Method:
Instant email delivery upon payment.
Licensing:
Lifetime ownership and usage rights.
Models Covered:
All models, engines, trim levels, and transmission types for 1990 Chevrolet S10 Pickup.
Estimated Page Count:
Extensive (Specific page count not provided, but implied to be comprehensive A-Z coverage).
Manual Type:
Workshop Service Repair Manual
File Format:
Digital (PDF compatible)
Powertrain:
Engine (all variants), Fuel System, Cooling System, Exhaust System, Transmission (manual and automatic), Drivetrain (RWD, 4WD).
Chassis:
Suspension (front and rear), Steering System, Brakes (front and rear systems, parking brake), Wheels and Tires.
Electrical:
Starting System, Charging System, Ignition System, Lighting System, Instrumentation, Wiper/Washer System, Horn, Power Accessories, Audio System, Wiring Diagrams.
Body:
Body Panels, Doors, Windows, Seats, Interior Trim, Exterior Trim, Bumpers, Glass, HVAC System (Heating, Ventilation, Air Conditioning).
Maintenance:
Routine checks, fluid changes, filter replacements, lubrication, tire rotation, brake pad inspection.
Troubleshooting:
Diagnostic charts for common problems, symptom-based diagnosis for engine, electrical, and mechanical issues.
Repair:
Detailed step-by-step instructions for component removal, disassembly, inspection, repair, reassembly, and installation for all major systems.
Component Overhaul:
Procedures for rebuilding engines, transmissions, differentials, and other major components.
Specifications:
Torque specifications, clearances, fluid capacities, diagnostic values, and test procedures.
Diagnostic Capabilities:
Advanced diagnostic procedures, including specific troubleshooting trees and expected readings.
Rebuild Procedures:
Comprehensive instructions for complete engine and transmission rebuilds, including component specifications and tolerances.
Electrical Diagnostics:
Detailed wiring diagrams, component location guides, and troubleshooting steps for all electrical systems.
Compatibility:
Compatible with all PC & MAC Computers, tablets, and mobile phones. Requires Adobe Reader.
Printability:
Printable by page, chapter, or entire manual.
Binding Type:
Digital Download (No physical binding)
Paper Type:
Digital (Not applicable)
Engine Options:
2.5L 4-Cylinder (LQ5), 4.3L V6 (LB4).
2.5L 4-Cylinder (Lq5) Estimated Hp:
Approx. 98 hp
2.5L 4-Cylinder (Lq5) Estimated Torque:
Approx. 132 lb-ft
4.3L V6 (Lb4) Estimated Hp:
Approx. 160 hp
4.3L V6 (Lb4) Estimated Torque:
Approx. 230 lb-ft
Fuel Delivery 2.5L:
Throttle Body Injection (TBI)
Fuel Delivery 4.3L:
Throttle Body Injection (TBI)
Standard Transmission:
4-Speed Manual (NVG SM465 often optional, others possible)
Optional Transmission:
4-Speed Automatic (700R4, THM200-4R)
Drivetrain Options:
Rear Wheel Drive (RWD), Four-Wheel Drive (4WD)
Body Styles:
Regular Cab, Extended Cab
Wheelbase Regular Cab:
118.0 inches (2997 mm)
Wheelbase Extended Cab:
129.7 inches (3294 mm)
Bed Lengths:
Short Bed (73.9 inches), Long Bed (97.9 inches)
Curb Weight Range:
Approx. 3,200 - 4,000 lbs (1451 - 1814 kg) depending on configuration.
NHTSA Ratings 1990:
Information for 1990 is not readily available; later models saw improvements. The manual will detail safety system checks.
Braking System:
Front disc brakes, rear drum brakes. Anti-lock braking system (ABS) was available as an option, primarily on 4WD models.
Restraint Systems:
Seat belts (lap and shoulder belts for front occupants). Airbags were not standard in 1990.
Oil Change Interval:
Typically every 3,000 - 5,000 miles (4,800 - 8,000 km) or 6 months, depending on driving conditions and oil type. Manual will specify.
Air Filter Replacement:
Recommended every 12,000 - 15,000 miles (19,300 - 24,100 km) or as needed based on inspection.
Spark Plug Replacement:
Varies by engine; typically around 30,000 miles (48,300 km) for conventional plugs.
Engine Oil Type:
Consult manual for specific viscosity (e.g., 5W-30, 10W-30) and API service classification based on engine and climate. For LB4 V6, typically 10W-30.
Coolant Type:
Ethylene glycol based coolant (green).
Transmission Fluid Manual:
GL-4 gear oil, typically 75W-90 or 80W-90.
Transmission Fluid Automatic:
Dexron II or equivalent.
Engine Vibration 4.3L:
Potential for rough idle or vibration due to worn engine mounts or balance shaft issues.
Tbi Performance:
Throttle Body Injection (TBI) systems can be prone to clogging or sensor issues, affecting performance and fuel economy.
Rear Main Seal Leaks:
Common on many vehicles of this era, the rear main seal can develop leaks over time.
Rust Susceptibility:
Like many trucks from this period, certain areas (wheel wells, cab corners, frame rails) can be susceptible to rust, especially in areas with road salt.
Chevrolet Truck Legacy:
Chevrolet has a long history of producing robust and versatile trucks, dating back to the Task Force trucks.
S10 Introduction:
The S-10 (and its GMC counterpart, the Sonoma) was introduced for the 1982 model year as a compact pickup truck, replacing the full-size C/K trucks for many buyers. The 1990 model represents the first generation of the S10.
Manufacturing Locations:
Primary assembly plants included St. Louis, Missouri, and Shreveport, Louisiana.
