OEM Front Catalytic Converter for 2020-2023 Buick & Chevrolet • Encore GX, Trailblazer

What to Look For When Buying

• Make sure the converter is designed for your vehicle's engine and model year.
• Check for any visible damage, like cracks or dents.
• Ask about the warranty offered.

Quality Indicators

• Look for converters made with high-quality materials.
• Check for good reviews from other buyers.
• Make sure the converter meets emissions standards for your area.

What's Included

• The catalytic converter itself.
• Sometimes, new gaskets or hardware are included. Check the product description.

Difficulty Level and Estimated Time

• Difficulty: Moderate
• Estimated Time: 1-3 hours

Special Tools Needed

• Socket set
• Wrench set
• Oxygen sensor socket (optional)
• Penetrating oil

Critical Steps and Tips

1. Disconnect the negative battery cable.
2. Spray penetrating oil on the bolts holding the converter in place.
3. Remove the old converter.
4. Install the new converter with new gaskets.
5. Tighten all bolts to the correct torque specifications.
6. Reconnect the negative battery cable.

DIY or Professional Installation?

• DIY is possible for experienced mechanics.
• Professional installation is recommended if you're not comfortable working on exhaust systems.

Compare: Used OEM, Refurbished OEM, New Aftermarket

• Used OEM: Genuine factory parts, tested and inspected, at lower prices.
• Refurbished OEM: Factory parts professionally restored with new components.
• New Aftermarket: Brand new third-party parts built to OE specs.

Used OEM

• Best value for budget-conscious buyers.
• Genuine factory part, so you know it will fit and perform well.
• Tested and inspected to ensure it's in good working condition.

Refurbished OEM

• A good compromise between price and quality.
• Factory part that has been restored to like-new condition.
• May include new components like the catalyst material.

New Aftermarket

• Brand new part, so you don't have to worry about wear and tear.
• Built to meet or exceed OE specifications.
• Wide range of brands and price points available.

Parts Commonly Replaced or Checked

• Oxygen sensors
• Exhaust manifold gasket
• Exhaust pipes
• Muffler

Preventing Repeat Failures

• Replacing oxygen sensors at the same time can prevent future converter failures. Faulty oxygen sensors can cause the engine to run too rich, which can damage the converter.
• Inspecting the exhaust system for leaks and repairing them can also help extend the life of the converter.

How Long This Part Normally Lasts

• 5-10 years or 80,000-120,000 miles

Factors That Affect Longevity

• Engine maintenance: Regular oil changes and tune-ups help prevent converter damage.
• Driving habits: Aggressive driving can shorten the lifespan of the converter.
• Fuel quality: Using high-quality fuel can help prevent clogging.

Budget vs Mid-Range vs Premium Options

• Used OEM: $150 - $300
• Refurbished OEM: $250 - $450
• New Aftermarket: $300 - $600

Labor Cost Considerations

• Labor costs for installation can range from $100 to $300, depending on the shop and location.

Total Job Cost Estimates

• Total cost: $250 - $900, depending on the part and labor costs.

Known Issues

• The 2022-2023 Buick Encore GX and Chevrolet Trailblazer can experience catalytic converter failure due to engine misfires.
• Some owners have reported issues with oil consumption, which can lead to converter damage.

TSBs or Common Complaints

• Check for any Technical Service Bulletins (TSBs) related to catalytic converter issues on these vehicles.

How to Confirm Proper Operation

• Check for the "Check Engine" light. It should be off after the new converter is installed.
• Use a scan tool to check the oxygen sensor readings. They should be within normal range.

What to Look/Listen For

• The engine should run smoothly and have good power.
• There should be no unusual noises or smells from the exhaust.
• Pass an emissions test.

Q: How do I know if my catalytic converter is bad?
A: Common signs include reduced engine power, poor fuel economy, a rattling sound, and a sulfur smell from the exhaust. The "Check Engine" light will often be on.

Q: Can I drive with a bad catalytic converter?
A: It's not recommended. A bad converter can damage your engine and reduce fuel economy. It can also cause you to fail an emissions test.

Q: Will a new catalytic converter improve my gas mileage?
A: Yes, if your old converter was clogged or damaged, a new one can restore your engine's efficiency and improve gas mileage.

Q: Are aftermarket catalytic converters as good as OEM?
A: Some aftermarket converters are built to meet or exceed OEM specifications. Look for reputable brands with good reviews.

Q: How often should I replace my catalytic converter?
A: A catalytic converter typically lasts 5-10 years or 80,000-120,000 miles. However, it may need to be replaced sooner if it's damaged or clogged.

OEM Part Numbers:

• GM: 12702141, 12705332, 12709243

Fits Years: 2020 2021 2022 2023