2021 - 2023 Chevrolet Trailblazer Throttle Body Assembly (OEM)

When buying a Throttle Body Assembly, look for these things:

• Compatibility: Make sure the part is made for your specific year, make, and model of vehicle.
• Condition: If buying a used part, check for any signs of damage or wear.
• Warranty: A warranty can protect you if the part fails soon after installation.

Quality indicators to consider:

• Brand reputation: Choose a reputable brand known for producing quality parts.
• Material quality: Look for parts made from durable materials that can withstand high temperatures and pressures.
• Testing and inspection: Make sure the part has been tested and inspected to ensure it meets quality standards.

What's typically included with the part:

• The Throttle Body Assembly itself.
• Sometimes, a new gasket is included. Check the product description.

The difficulty level for installing a Throttle Body Assembly is generally considered moderate. Estimated time is usually 1-2 hours.

Special tools you might need:

• Socket set
• Wrench set
• Screwdrivers
• Throttle body cleaner
• Scan tool (to clear codes after installation)

Critical steps and tips:

1. Disconnect the negative battery cable before starting any work.
2. Remove the air intake duct from the throttle body.
3. Disconnect the electrical connector from the throttle body.
4. Remove the old throttle body from the intake manifold.
5. Clean the mating surface on the intake manifold.
6. Install the new throttle body with a new gasket (if needed).
7. Reconnect the electrical connector.
8. Reinstall the air intake duct.
9. Reconnect the negative battery cable.

DIY is possible for mechanically inclined individuals. However, professional installation is recommended if you're not comfortable working on your car.

Here's a comparison of different Throttle Body Assembly options:

• Used OEM: These are genuine factory parts that have been removed from used vehicles. They offer the best value, as they are tested and inspected to ensure they are in good working condition, but cost less than new parts.
• Refurbished OEM: These are factory parts that have been professionally restored to like-new condition. They often include new components and come with a warranty.
• New Aftermarket: These are brand new parts made by third-party manufacturers. They are designed to meet or exceed original equipment (OE) specifications.

All three options can be good choices, depending on your budget and needs.

Parts commonly replaced or checked at the same time:

• Air filter: A dirty air filter can restrict airflow and cause the throttle body to work harder.
• Intake manifold gasket: This gasket seals the intake manifold to the engine. If it's leaking, it can cause vacuum leaks that affect engine performance.
• Mass airflow (MAF) sensor: This sensor measures the amount of air entering the engine. A faulty MAF sensor can cause the engine to run poorly.

Replacing these parts at the same time can help prevent repeat failures and ensure optimal engine performance.

A Throttle Body Assembly typically lasts 75,000 to 150,000 miles.

Factors that can affect longevity:

• Driving conditions: Frequent stop-and-go driving can shorten the lifespan of the throttle body.
• Maintenance: Regular cleaning and maintenance can help extend the life of the throttle body.
• Quality of parts: Using high-quality parts can help ensure a longer lifespan.

Here's a general idea of price ranges for different Throttle Body Assembly options:

• Used OEM: $50 - $150
• Refurbished OEM: $100 - $250
• New Aftermarket: $150 - $300

Labor costs for installation can range from $100 to $200, depending on the shop and your location.

Total job cost estimates:

• Used OEM: $150 - $350
• Refurbished OEM: $200 - $450
• New Aftermarket: $250 - $500

Some 2020-2025 Buick Encore GX, Chevrolet Envista, Trailblazer, and Trax vehicles have experienced issues with carbon buildup in the throttle body, leading to rough idling and stalling. Regular cleaning of the throttle body is recommended to prevent these issues. There may be Technical Service Bulletins (TSBs) related to throttle body issues on these vehicles. Check with your dealer or a trusted mechanic for more information.

After installing the new Throttle Body Assembly, confirm proper operation by:

• Starting the engine and letting it idle. The engine should idle smoothly without any hesitation or stalling.
• Driving the vehicle and checking for smooth acceleration and consistent power.
• Using a scan tool to check for any new diagnostic trouble codes.
• Listening for any unusual noises coming from the engine.

If the engine runs smoothly and there are no new trouble codes, the installation was successful.

Q: How often should I clean my throttle body?
A: It's generally recommended to clean your throttle body every 30,000 to 50,000 miles, or whenever you notice symptoms like rough idling or stalling.

Q: Can a bad throttle body affect my gas mileage?
A: Yes, a faulty throttle body can cause your engine to run inefficiently, leading to reduced fuel economy.

Q: Will a new throttle body improve my car's performance?
A: If your old throttle body was causing problems, a new one can definitely improve your car's performance, restoring smooth idling, acceleration, and fuel economy.

Q: Do I need to reprogram my car's computer after replacing the throttle body?
A: In some cases, you may need to perform a throttle body relearn procedure using a scan tool to ensure the new throttle body is properly calibrated.

Q: What happens if I don't replace a bad throttle body?
A: Ignoring a bad throttle body can lead to more serious engine problems, such as damage to the catalytic converter or other components.

OEM Part Numbers:

• GM: 12705445, 12710635, 12711311, 25205292

Fits Years: 2021 2022 2023