Introduction
This document provides a summary of key information found in the original 1990 Chevrolet C/K Pickup Truck Owner's Manual. It is designed to assist owners in understanding the features, operation, and maintenance requirements of their vehicle. For complete details and safety warnings, always refer to the comprehensive original manual.

Image: Front cover of the 1990 Chevrolet C/K Pickup Truck Owner's Manual. The cover displays "1990 CHEVROLET TRUCKS" at the top, with "C/K SERIES TRUCK Owner's Manual" prominently in the center. A note at the bottom advises to keep the manual with the vehicle for important operating, safety, and maintenance instructions.
Initial Familiarization and Controls
Before operating the vehicle, familiarize yourself with the location and function of essential controls and indicators. This includes the instrument panel, steering wheel controls, and interior features.
- Instrument Panel: Understand the speedometer, odometer, fuel gauge, temperature gauge, oil pressure gauge, and voltmeter. Pay attention to warning lights such as the check engine light, oil pressure warning, and battery charge indicator.
- Ignition Switch: Learn the positions: LOCK, ACC (Accessory), OFF, RUN, and START.
- Lighting Controls: Locate and understand the operation of headlights, high beams, turn signals, and hazard lights.
- Wiper/Washer Controls: Familiarize yourself with the windshield wiper speeds and washer fluid activation.
- Climate Control: Understand how to operate the heating, ventilation, and air conditioning system.
Vehicle Operation
Proper operation ensures safety and longevity of your Chevrolet C/K Pickup Truck.
Starting the Engine
- Ensure the transmission is in PARK (automatic) or NEUTRAL (manual) and the parking brake is engaged.
- Insert the key into the ignition and turn it to the START position. Release the key once the engine starts.
- Allow the engine to warm up briefly, especially in cold weather, before driving.
Driving
- Transmission: Understand the gear selector positions for automatic transmissions (P, R, N, D, 2, 1) or the shift pattern for manual transmissions.
- Braking: Apply steady pressure to the brake pedal for smooth stops. Use engine braking on downhills with manual transmissions.
- Steering: Maintain a firm grip on the steering wheel and be aware of road conditions.
- Towing: If towing, consult the original manual for specific weight limits, hitch requirements, and safe towing practices.
Maintenance Schedule and Procedures
Regular maintenance is crucial for the reliability and performance of your vehicle. Refer to the original manual for detailed service intervals.
Routine Checks (Owner Responsibilities)
- Engine Oil: Check oil level regularly and change according to the recommended schedule.
- Coolant Level: Inspect the coolant reservoir level and ensure proper concentration.
- Brake Fluid: Verify the brake fluid level is within the specified range.
- Tire Pressure: Check tire pressure weekly, including the spare, and adjust to recommended levels.
- Lights: Confirm all exterior and interior lights are functioning correctly.
- Wiper Blades: Inspect wiper blades for wear and replace as needed.
Scheduled Service
Adhere to the manufacturer's recommended service intervals for:
- Oil and filter changes
- Tire rotation
- Air filter replacement
- Spark plug inspection/replacement
- Transmission fluid service
- Brake system inspection
Troubleshooting Common Issues
This section addresses common problems and provides basic steps for resolution. For complex issues, consult a qualified service technician.
| Symptom | Possible Cause | Action |
|---|---|---|
| Engine cranks but won't start | Low fuel, dead battery, faulty ignition system | Check fuel level, check battery terminals, attempt jump start if battery is dead. |
| Overheating engine | Low coolant, faulty thermostat, radiator issues | Pull over safely, turn off engine, allow to cool. Check coolant level once cool. Do not open radiator cap when hot. |
| Warning light illuminated | Indicates a system malfunction (e.g., oil pressure, battery, check engine) | Consult the original manual to identify the specific warning light. Address the issue promptly or seek professional assistance. |
Vehicle Specifications
Key specifications for the 1990 Chevrolet C/K Pickup Truck may vary by specific model and configuration. Consult your original manual for exact figures.
- Engine Options: Typically V6 or V8 gasoline engines.
- Transmission: Manual or Automatic.
- Fuel Tank Capacity: Varies by wheelbase and tank configuration.
- Tire Size: Specific to trim level and wheel option.
- Gross Vehicle Weight Rating (GVWR): Maximum permissible weight of the vehicle including occupants, cargo, and trailer tongue weight.
- Towing Capacity: Varies significantly based on engine, transmission, axle ratio, and hitch type.





