2006 - 2009 Chevrolet Trailblazer Throttle Body Assembly (OEM)

What to Look for When Buying:

• Compatibility: Make sure the part is designed to work with your specific year, make, and model vehicle.
• Condition: Consider the condition of the part (used, refurbished, or new aftermarket) and choose based on your budget and needs.
• Warranty: Check if the part comes with a warranty. A warranty can protect you if the part fails prematurely.

Quality Indicators:

What's Typically Included:

• The throttle body assembly itself
• Sometimes includes the throttle position sensor (TPS)
• Sometimes includes the idle air control (IAC) valve (if applicable)
• Gaskets may or may not be included (check the product description)

Difficulty Level and Estimated Time:

• Difficulty: Intermediate
• Estimated Time: 1-2 hours

Special Tools Needed:

• Socket set
• Wrench set
• Screwdrivers
• Throttle body cleaner (optional)
• OBD2 scanner (for clearing codes after installation)

Critical Steps and Tips:

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

DIY or Professional Installation:

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

| Option | Description be sure to check for availability and pricing.

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

• Mass Air Flow (MAF) Sensor
• Air Filter
• Intake Manifold Gasket
• Throttle Position Sensor (TPS)

Replacing these parts at the same time can prevent repeat failures. For example, a dirty MAF sensor can cause the throttle body to work harder, leading to premature wear. A cracked intake manifold gasket can cause vacuum leaks, which can also affect throttle body performance.

• The throttle body assembly typically lasts for 75,000 to 150,000 miles.

Factors That Affect Longevity:

• Driving conditions (stop-and-go traffic vs. highway driving)
• Regular maintenance (air filter replacement, throttle body cleaning)
• Quality of fuel used
• Environmental factors (dust, humidity)

• Used OEM: $50 - $150
• Refurbished OEM: $100 - $250
• New Aftermarket: $120 - $300
• Labor Cost: $100 - $300 (depending on the shop and location)
• Total Job Cost Estimate: $150 - $600

• Some of these vehicles are known to have issues with carbon buildup in the throttle body, which can lead to rough idling and stalling.
• Check for any Technical Service Bulletins (TSBs) related to the throttle body on these vehicles.
• Some owners have reported issues with the throttle position sensor (TPS) on these vehicles.

How to Confirm Proper Operation:

• Start the engine and let it idle.
• Check for smooth and stable idle speed.
• Test the acceleration by pressing the gas pedal. The engine should respond quickly and smoothly.
• Use an OBD2 scanner to check for any new trouble codes.

What to Look/Listen for:

• No unusual noises from the engine.
• No hesitation or stumbling during acceleration.
• Stable idle speed.
• No Check Engine Light.

FAQ

Q: How do I know if my throttle body needs to be replaced or just cleaned?
A: If cleaning the throttle body temporarily fixes the problem, but the symptoms return quickly, it likely needs to be replaced. Also, if the throttle position sensor is faulty, replacing the entire assembly is often the best solution.

Q: Will I need to have my car reprogrammed after replacing the throttle body?
A: In some cases, yes. Some vehicles require a throttle body relearn procedure after replacement. This can often be done with an OBD2 scanner that has relearn capabilities. Check your vehicle's repair manual for specific instructions.

Q: What happens if I don't replace a failing throttle body?
A: A failing throttle body can cause poor engine performance, reduced fuel economy, and potential damage to other engine components. It's best to address the issue as soon as possible.

Q: Can I use any throttle body cleaner to clean my throttle body?
A: It is best to use a throttle body cleaner that is specifically designed for electronic throttle bodies. Using the wrong cleaner can damage the throttle position sensor.

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 more frequently if you drive in dusty conditions.

OEM Part Numbers:

• GM: 12572658, 12580760, 12679524

Fits Years: 2006 2007 2008 2009