This comprehensive service and repair manual for the 1990 Chevrolet Van G10, G20, and G30 models provides detailed instructions, diagrams, and specifications for every aspect of your vehicle. This is the same manual used by technicians at dealerships for maintenance, servicing, diagnostics, and repair, ensuring accurate and reliable information. The manual covers a wide range of topics, including:

* **Maintenance:** Learn how to perform routine maintenance tasks such as oil changes, filter replacements, and fluid checks.
* **Engine:** Dive deep into engine systems, covering components like the cylinder head, pistons, crankshaft, camshaft, and valvetrain.
* **Control System:** Understand the intricate workings of your vehicle's electronic control systems, including fuel injection, ignition, and emissions control.
* **Mechanical Systems:** Gain a thorough understanding of your van's mechanical systems, including the transmission, drivetrain, suspension, steering, and brakes.
* **Fuel Service Specifications:** Find detailed specifications for fuel systems, including fuel injectors, fuel lines, fuel pump, and fuel tank.
* **Emission Control:** Learn about the components and operation of your van's emissions control system, including catalytic converter, oxygen sensors, and evaporative emission control system.
* **Intake, Exhaust, and Cooling Systems:** Explore the intricacies of your van's intake, exhaust, and cooling systems, including the intake manifold, exhaust manifold, and radiator.
* **Lube, Ignition, Starting, Charging:** Understand the lubrication system, ignition system, starting system, and charging system, including components like spark plugs, distributor, alternator, and starter motor.
* **Transmission and Drivetrain:** Delve into your van's transmission and drivetrain systems, covering automatic and manual transmissions, transfer case, propeller shaft, drive shafts, differentials, and axles.
* **Suspension, Tire, and Wheel:** Learn about the various components of your van's suspension, tire, and wheel systems, including struts, shocks, springs, wheel bearings, and tires.
* **Brake System:** Gain a comprehensive understanding of your van's brake system, covering brake calipers, rotors, pads, master cylinder, and brake lines.
* **Steering System:** Explore the intricacies of your van's steering system, including the steering column, power steering pump, and steering gear.
* **Air Conditioning:** Learn about your van's air conditioning system, including the compressor, condenser, evaporator, and refrigerant lines.
* **Supplemental Restraint System:** Understand the operation of your van's safety systems, including airbags, seat belts, and engine immobilizer.
* **Cruise Control, Wiper and Washer, Door Lock, Meter, Horn, Windshield, and Seat:** Find information on the operation and maintenance of various comfort and convenience features in your van.
* **Electrical, Multiplex, and CAN Communication:** Explore the electrical system of your van, covering wiring diagrams, circuits, and advanced communication systems.

This manual provides the complete information you need to service and repair your 1990 Chevrolet Van G10, G20, or G30 with confidence. No more flipping through multiple books or searching for answers online.

The 1990 Chevrolet Van G10, G20, and G30 were full-size vans produced by Chevrolet during a period of significant changes in the automotive industry. These vans were the successors to the popular Chevrolet Van line, which had been in production since the 1960s. While the 1990 models retained the familiar boxy shape and robust construction of their predecessors, they incorporated several key improvements, including updated styling, modern powertrain options, and enhanced safety features. The G10, G20, and G30 were available in a variety of configurations, catering to diverse needs. The G10 served as the base model, while the G20 offered increased payload capacity and the G30 boasted the heaviest hauling capabilities, ideal for commercial applications.

The 1990 Chevrolet Van G10, G20, and G30 were powered by a range of gasoline and diesel engines, offering a balance of power and fuel efficiency. The gasoline options included the 4.3-liter V6 and the 5.0-liter V8, while the diesel engine was a 6.2-liter V8. These engines were paired with robust transmissions, ensuring smooth shifting and dependable performance. The van's spacious interior could accommodate up to 12 passengers or various cargo configurations, making it versatile for families, businesses, and recreational activities. The 1990 Chevrolet Van line was known for its durability and reliability, making it a popular choice for those seeking a robust and dependable vehicle for work or leisure. These vans continued to be produced until 1996, leaving a lasting legacy as a workhorse and a symbol of American automotive ingenuity.