How Many Catalytic Converters Are In A Chevy Express Van?

A catalytic converter is crucial in modern vehicles since air quality is a major concern for automakers and drivers. This post can assist you if you own a Chevy Express Van and need to replace its catalytic converters but are unsure how many it has. 

Depending on the model, a Chevy Express Van will have at least one catalytic converter. It is located on the underside of the van in the exhaust system. 

Continue reading to learn more about how many catalytic converters your Chevy Express Van has and how they work. We will also discuss how long a catalytic converter lasts, the critical indicators of a malfunctioning catalytic converter, and how to maintain it to increase its lifespan. So, read on!

How Many Catalytic Converters Does A Chevy Express Van Have? 

Old Used Catalytic Converter in Car Exhaust System.

The primary function of the catalytic converter, which is a part of the exhaust system in the Chevy Express Van, is to convert hazardous exhaust gases (carbon monoxide and hydrocarbons) into less hazardous byproducts (carbon dioxide and nitrogen gas).

The number of catalytic converters in a Chevy Express van will depend on the model. Most vans have at least one catalytic converter, typically found on the van's underside or in the exhaust system, between the engine and the muffler. 

There are frequently two converters in certain more recent vehicles with dual exhaust systems. Additionally, some contain more than two catalytic converters, usually needed to meet pollution requirements.

How Does A Catalytic Converter Work?

Close-up of Old Catalytic Converter and Resonator in Car Exhaust System., How Many Catalytic Converters Are In A Chevy Express Van?

When an engine emits dangerous substances, a catalytic converter employs a chamber known as a catalyst to convert them into harmless gases like steam. It separates the dangerous compounds from a car's emissions before they are released into the air.

Your car's exhaust system is where you'll find the catalytic converter, which looks like a huge metal box or muffler. It's often located between the muffler and the exhaust manifold.

It has two pipes. The converter uses the catalyst and these two pipes to prepare the gases for release. Gases are introduced through the input pipe that is attached to the vehicle's engine.

These are then expelled over the catalyst, creating a chemical reaction that disintegrates the pollutants.  The second pipe attached to a car's tailpipe delivers fewer harmful gases.

What Are The Signs Of A Failing Catalytic Converter?

Close up Damaged Catalytic car in hand man remove from engine gasoline car

There are a few telltale warning signs that indicate catalytic converter failure. Here are the indications that your catalytic converter need to be checked:

Reduced Fuel Economy

A clogged catalytic converter can significantly decrease the fuel efficiency of your car.

This results from your engine's inability to remove emissions and poor operating conditions, which causes it to need more fuel to generate the same amount of power efficiently.

Your catalytic converter might be the issue if you notice that you're stopping at the gas station at an increasing rate, even though your driving habits haven't changed much.

As you will have to fill up more frequently, ignoring this issue could be expensive. To address this problem and avoid further expenditures, consult a muffler expert.

Unusual Noises

The catalytic converter may be damaged if your car's exhaust makes a rattling sound, especially when you turn the ignition key.

The mesh inside your catalytic converter may have deteriorated due to age, or your muffler system may have a loose screw, which can be quickly replaced.

Your catalytic converter may need to be replaced because it is not effectively filtering your emissions and has started to fail structurally.


A clogged catalytic converter can decrease exhaust emissions. Due to this, the gases may accumulate and choke the engine. Your car may consequently stall from time to time, and you may have problems starting it. If you're on the highway, a car that stalls can be extremely hazardous.

You should take your car to an auto shop for a proper diagnosis and catalytic converter repair because it can quickly become a safety problem for you and other drivers.

Unusual Smell

The crucial job of a catalytic converter is to convert exhaust fumes into less dangerous emissions.

However, some of the chemicals present in the fuel may pass through if it is broken without being converted. Hydrogen sulfide is one such chemical.

The catalytic converter transforms this substance into sulfur dioxide, an odorless gas. The hydrogen sulfide slips through unconverted if your catalytic converter is malfunctioning.

It smells like rotten eggs, which is its distinctive scent. If you notice this odor coming from your exhaust, it could be time to change your catalytic converter.

Check Engine Light Appears

During ignition, your dashboard's engine and other lights temporarily turn on.

After a short while, these lights disappear. However, the check engine light will remain illuminated if there is an engine or exhaust system issue. A damaged catalytic converter is one of the causes of this light.

Modern cars are built with oxygen sensors connected to the catalytic converter. Exhaust emissions are monitored using these sensors.

An error notification in the form of the check engine light will flash if malfunctions occur. This may be due to a number of other factors. A correct diagnosis is therefore required.

Most vehicle repair shops have a diagnostic scan instrument that can identify problems via fault codes. It would be better to replace your catalytic converter once you have determined the issue.

Click here to see this onboard diagnostic scanner on Amazon. 

How Long Does A Catalytic Converter Last?

Catalytic converter of a modern car bottom view.

A brand-new catalytic converter should last for roughly 10 years, although the exact lifespan can vary. After 70,000 to 100,000 miles, evaluating the item's condition is advisable because mileage and engine tuning can affect its durability.

If you're buying a used car, it's important to find out if the catalytic converters have been changed. In most cases, a car needs to have the catalytic converters updated at least once during its lifetime.

How To Maintain Your Catalytic Converters

Mechanic repairing a car catalytic

A new catalytic converter may be expensive, so you want to keep yours in good operating order. The recommendations for maintaining it in good condition are listed below.

Clean Your Catalytic Converter

Use a catalytic converter cleaner to clear out any carbon deposits or buildup. These cleaners are affordable and very simple to use. Just pour the liquid into your gas tank. The majority of these products can clean catalytic converters, fuel injectors, and the fuel system.

To keep your catalytic converter in top condition, pour a bottle of this cleaner into your gas tank every 1,000 miles.

Click here to see this catalytic converter cleaner on Amazon. 

Avoid Short Trips

Driving for brief distances is not recommended. For optimal performance and adequate burn-off of carbon and other deposits, your catalytic converter must reach its full operating temperature.

Your car typically needs a few minutes to get up to operating temperature. Your catalytic converter will never be able to completely clean itself if you regularly drive short distances.

Your catalytic converter may clog due to excessive buildup caused by this.

To ensure that your converter has time to achieve operating temperature and burn off any deposits that may be present, make sure to periodically drive your car over long distances.

Know Where To Park

During periods of heavy snowfall, use caution when parking or driving through snow or deep puddles.

The catalytic converter runs at a very high temperature and quickly cools down when it comes into contact with water or snow. The monolith cools faster than the steel shell, and in extreme cases, the monolith may be destroyed as the steel shell shrinks.


Close-up of Old Catalytic Converter and Resonator in Car Exhaust System.

A Chevy Express Van will have at least one catalytic converter. When the time comes to replace the catalytic converters, you'll find it helpful to know where they're located. 

When your catalytic converter begins to malfunction, you'll notice some crucial signs: your check engine light may come on, and you'll hear odd noises or rattling sounds when you turn the key.

Other warning signs include excessive fuel consumption, an odd odor similar to rotten eggs, and high fuel consumption. 

Catalytic converters typically last 10 years, but you can increase their lifespan by following the tips covered in this post.

Made it to the end? Here are other articles you might find helpful:

Ford F-150 Catalytic Converter Scrap Price – How Much Can You Expect?

Does A Catalytic Converter Reduce Power Or Affect Mileage?

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