The Chevrolet and GMC G-Series vans were made by General Motors for North America. They are in the same vehicle class as the discontinued Ford Econoline van and Dodge Ram Van.The term “Chevrolet van” also refers to the entire series of vans sold by Chevrolet. The first Chevrolet van was released in 1961 on the Corvair platform, and the latest Chevrolet van in production is the Chevrolet Express.The G20 and its counterparts replaced the original Chevrolet Corvair Greenbrier Van in the late 60s the model line evolved until it was replaced in 1996 by the Chevrolet Express. 1964-70 G20s came with six-lug wheels (6 lugs – 5.5″ (139.6 mm) bolt circle), while the 1971-96 generation came with the 5 lug – 5″ (127 mm) bolt circle.G20s were fitted with the ball joints from the Chevrolet/GMC 3/4 and 1 ton pickups although using the 1/2 ton pickup’s brake rotors.A light duty version, the G10, was produced alongside the G20 – the early versions used the Chevrolet passenger car wheels (5 lugs – 4.75″ (120.7 mm) bolt circle) until 1975 (G10s manufactured prior to the 1976 model year had the smaller bolt pattern, common with the short wheelbase vans), yet can still handle LT tire sizes for better handling and stability. The G20 series sported an SB 262 4.3L engine, not much was changed mechanically in the vehicles since their release, other than carburettor to a throttle body injection fuel system, and less use of a vacuum system. Currently there are more after market part options available for its V8 counterparts. Not much has been done in the lines of performance options for the small V6 G20 models, but the reliability remains the same throughout all the G-series models.The G20’s low cost of upkeep, size, and options have made this van popular with all different kinds of trades, from plumbers to caterers.
Frequently Asked Questions
How do I adjust the headlights on my GMC G Van?
To adjust the headlights on your GMC G Van, locate the adjustment screws, which are usually located near the headlight assembly. Park the vehicle on a level surface, facing a wall or garage door approximately 25 feet away. Turn on the headlights and identify the horizontal and vertical adjustment screws. Use a screwdriver or appropriate tool to adjust the headlights’ aim, ensuring they are aligned properly and providing adequate visibility without blinding oncoming drivers.
How do I change the air filter in my GMC G Van?
To change the air filter in your GMC G Van, locate the air filter housing, which is typically located under the hood. Remove the clips or screws securing the housing and carefully open it. Take note of the current position and orientation of the old air filter before removing it. Insert the new air filter in the correct direction, making sure it fits securely. Finally, close the air filter housing, ensuring all clips or screws are properly fastened.
How do I change the oil in my GMC G Van?
To change the oil in your GMC G Van, start by removing the oil drain plug located at the bottom of the oil pan. Allow the old oil to fully drain out before reinstalling the drain plug. Next, locate and remove the oil filter, making sure to properly dispose of it. Finally, refill the engine with the recommended amount and type of new oil, checking the oil level and ensuring it is within the appropriate range on the dipstick.
How do I replace a blown fuse in my GMC G Van?
To replace a blown fuse in your GMC G Van, locate the fuse box, which is usually found under the dashboard or in the engine compartment. Refer to the fuse box diagram in the owner’s manual to identify the specific fuse associated with the malfunctioning component. Using a fuse puller or needle-nose pliers, carefully remove the blown fuse and replace it with a new fuse of the same amperage rating. Ensure the replacement fuse is securely inserted, and test the component to confirm it is functioning properly.
How do I replace a broken side mirror on my GMC G Van?
To replace a broken side mirror on your GMC G Van, start by removing the interior door panel to access the mirror mounting bolts. Carefully detach any electrical connectors or wiring harnesses connected to the mirror. Remove the mounting bolts and carefully pull the old mirror assembly away from the vehicle. Install the new mirror assembly, ensuring it is properly aligned and fastened. Finally, reconnect any electrical connectors and test the mirror’s functionality.
How do I replace a faulty fuel pump in my GMC G Van?
To replace a faulty fuel pump in your GMC G Van, start by relieving the fuel pressure by disconnecting the fuel pump relay or fuse and allowing the engine to run until it stalls. Safely disconnect the negative battery cable to prevent any accidental fuel ignition. Locate the fuel pump, which is usually located inside the fuel tank, and remove any necessary components or connections to access it. Carefully remove the old fuel pump and replace it with a new one, ensuring all connections are properly reattached. Reconnect the negative battery cable and test the fuel pump for proper operation.
How do I replace a faulty ignition coil in my GMC G Van?
To replace a faulty ignition coil in your GMC G Van, start by locating the ignition coil pack, which is usually attached to the engine. Disconnect the electrical connectors and any mounting bolts securing the old ignition coil. Carefully remove the old coil and replace it with a new one, ensuring it is properly aligned and fastened. Reconnect the electrical connectors and test the ignition system to confirm proper operation.
How do I replace the brake pads on my GMC G Van?
To replace the brake pads on your GMC G Van, start by safely lifting the vehicle and removing the wheels. Locate the brake caliper and remove the bolts securing it to the caliper bracket. Carefully remove the caliper and old brake pads, taking note of their position for proper reinstallation. Install the new brake pads and reattach the caliper to the caliper bracket. Finally, reinstall the wheels and lower the vehicle before testing the brakes for proper functionality.
How do I troubleshoot a malfunctioning power window in my GMC G Van?
When troubleshooting a malfunctioning power window in your GMC G Van, start by checking the fuse associated with the power window circuit. If the fuse is intact, proceed to inspect the window switch for any signs of damage or loose connections. Additionally, check the wiring harness and connectors for any frayed wires or corrosion. If the issue persists, it may be necessary to remove the door panel to access the window regulator and motor for further inspection or replacement.
How often should I change the transmission fluid in my GMC G Van?
The frequency of transmission fluid changes in your GMC G Van depends on several factors, including the driving conditions and the type of transmission. As a general guideline, it is recommended to change the transmission fluid every 30,000 to 60,000 miles or every 2 to 4 years. However, it is crucial to consult the specific recommendations outlined in your vehicle’s manual for accurate guidance on when to change the transmission fluid.
What is the recommended tire pressure for my GMC G Van?
The recommended tire pressure for your GMC G Van can be found in the owner’s manual or on a sticker located on the driver’s side door jamb. It is important to maintain the recommended tire pressure for optimal handling, fuel efficiency, and tire wear. Use a tire pressure gauge to check the current pressure and adjust it accordingly. Remember to check the tire pressure when the tires are cold, as heat generated during driving can increase the pressure.
What should I do if my GMC G Van’s battery keeps draining?
If your GMC G Van’s battery keeps draining, start by checking for any lights or accessories that may have been left on and are draining the battery. Inspect the battery terminals for any corrosion or loose connections, cleaning and tightening them as necessary. If the battery continues to drain, it may be necessary to perform a parasitic draw test to identify any electrical components or circuits that are drawing excessive current when the vehicle is off. Consult a professional mechanic for further assistance in diagnosing and resolving the battery drain issue.
What should I do if my GMC G Van’s engine is overheating?
If your GMC G Van’s engine is overheating, the first step is to safely pull over and turn off the engine to prevent further damage. Allow the engine to cool down before attempting any repairs. Check the coolant level in the radiator and add more if necessary. Additionally, inspect the radiator hoses for any leaks or signs of damage that may be causing the overheating issue. If the problem persists, it is recommended to consult a professional mechanic for further diagnostics and repairs.
What type of coolant should I use for my GMC G Van?
The type of coolant recommended for your GMC G Van can be found in the owner’s manual. It is crucial to use the correct coolant type to ensure optimal engine performance and prevent cooling system damage. The manual will specify the appropriate coolant type, such as ethylene glycol-based or propylene glycol-based, as well as any specific coolant mixture ratios or additives required.
Why is my GMC G Van’s check engine light illuminated?
The check engine light in your GMC G Van illuminates when the vehicle’s onboard diagnostic system detects a potential issue with the engine or emissions system. There are numerous reasons why the check engine light may come on, ranging from minor issues like a loose gas cap to more significant problems with the engine components. It is recommended to use a diagnostic code reader to retrieve the specific trouble code causing the check engine light. This code can then be used to identify the underlying problem and determine the appropriate course of action.
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