This comprehensive 1991 Chevrolet Van G10, G20, G30 Service and Repair Manual provides you with the exact same information used by technicians at dealerships to maintain, service, diagnose and repair your vehicle. It covers all models and all repairs from A to Z. This manual contains detailed instructions, diagrams, illustrations, wiring schematics, and specifications, allowing you to completely repair your vehicle with ease. You will find detailed information on a wide range of topics, including:

* **Maintenance:** This section covers all aspects of routine maintenance, such as oil changes, filter replacements, and fluid checks.
* **Engine:** Discover detailed information on the engine, including its operation, troubleshooting, and repair procedures.
* **Control System:** Gain a thorough understanding of your vehicle's control systems, from the engine control unit to the various sensors and actuators.
* **Mechanical:** Learn about all the mechanical components of your van, including the transmission, drivetrain, brakes, steering, and suspension. You'll find instructions for repair and replacement procedures.
* **Fuel Service Specifications:** Find specific details and specifications for fuel system components and operation.
* **Emission Control:** Understand how your vehicle's emissions control system works and how to diagnose and repair any issues.
* **Intake Exhaust Cooling:** Learn about the intake and exhaust systems, cooling system, and related components.
* **Lube:** Get detailed information on lubrication systems, including types of fluids, maintenance schedules, and procedures.
* **Ignition Starting Charging:** Explore the ignition, starting, and charging systems, including troubleshooting and repair.
* **Auto Transmission Clutch:** Dive into auto transmission operations, clutch systems, and repair procedures.
* **Manual Transmission:** Get complete coverage on manual transmissions, including operation, troubleshooting, and repair.
* **Transfer Propeller Shaft:** Learn about the transfer case, propeller shaft, and related components.
* **Drive Shaft:** Understand the drive shaft system, including inspection, maintenance, and repair.
* **Differential:** Discover the intricate workings of the differential system, how to diagnose issues, and repair procedures.
* **Axle Suspension:** Explore the axle and suspension systems, including troubleshooting and repair.
* **Tire & Wheel:** Learn about tire and wheel specifications, maintenance procedures, and common issues.
* **Brake Control:** Gain a deep understanding of braking systems, including the brake control module and ABS system.
* **Brake:** Find comprehensive information on brake systems, including disc brakes, drum brakes, and maintenance.
* **Parking Brake:** Learn about the parking brake system, its operation, and troubleshooting tips.
* **Steering Column:** Understand the steering column and its components, including troubleshooting and repair.
* **Power Steering:** Explore the features of power steering systems, how they work, and how to diagnose and repair issues.
* **Air Condition:** Get detailed information on the air conditioning system, its components, and repair procedures.
* **Suppl Restraint System:** Learn about the supplemental restraint system, including airbags and seatbelt pretensioners, and how to maintain and troubleshoot them.
* **Seat Belt:** Discover the functions and maintenance procedures for your van's seatbelts.
* **Engine Immobilizer:** Understand the engine immobilizer system, its role in security, and how to troubleshoot any issues.
* **Cruise Control:** Explore the cruise control system, its operation, and common troubleshooting steps.
* **Wiper & Washer:** Learn about the windshield wiper and washer systems, how to maintain them, and common issues.
* **Door Lock:** Discover the various door lock systems, how they operate, and how to troubleshoot and repair them.
* **Meter Audio/Visual:** Get detailed information on the vehicle's gauges, displays, and audio/visual systems.
* **Horn:** Explore the horn system, including troubleshooting and repair procedures.
* **Windshield/Glass Mirror:** Learn about the windshield, windows, and mirrors, including replacement procedures.
* **Instrument Panel:** Understand the instrument panel, its components, and how to troubleshoot any issues.
* **Seat:** Discover the various seat systems, including adjustments, heating, ventilation, and repair.
* **Engine Hood/ Door:** Learn about the engine hood and doors, including operation, troubleshooting, and repair.
* **Exterior & Interior:** Explore the exterior and interior of your van, including trim, panels, and upholstery.
* **Electrical:** Gain a comprehensive understanding of the electrical system, including wiring diagrams and troubleshooting.
* **Multiplex/ Can Communication:** Explore the multiplex and CAN communication systems, which control various vehicle functions.

This manual is compatible with all versions of Windows and Mac operating systems. Print only the pages you need, ensuring you always have the necessary information at your fingertips, whether in your garage or workshop.

The 1991 Chevrolet Van G10, G20, and G30, collectively known as the "G-Series," represented the final iteration of Chevrolet's venerable full-size van line produced from 1967 to 1996. These workhorses were known for their durability, versatility, and spacious cargo areas, making them popular choices for businesses, families, and individuals seeking a rugged and reliable vehicle. The G10, G20, and G30 models were distinguished by their gross vehicle weight rating (GVWR), with the G10 being the lightest and the G30 the heaviest. All three models shared the same basic platform, featuring a robust ladder frame chassis, solid axles, and a variety of engine options.

The 1991 G-Series models offered a range of powertrains, including the ubiquitous 4.3L V6, the powerful 5.7L V8, and the even more robust 7.4L V8, all paired with a 4-speed automatic transmission. Customers could choose from a variety of body styles, including passenger vans, cargo vans, and cutaway chassis, offering flexibility for a wide range of applications. The G-Series offered a comfortable and functional interior, featuring durable upholstery, ample storage space, and a user-friendly layout. While the G-Series models were praised for their reliability and versatility, they were also known for their fuel-thirsty nature and somewhat dated design compared to newer, more modern competitors. Despite its age, the 1991 Chevrolet Van G-Series remained a popular choice for those seeking a capable and dependable workhorse.