2021 - 2025 Chevrolet Trailblazer AC Compressor (OEM)

• What to Look For: Make sure the compressor is the correct type for your vehicle. Check for any visible damage, like cracks or dents. Ask about the warranty.

• Quality Indicators: For used parts, look for ones that have been tested and inspected. Refurbished parts should have new seals and bearings. New aftermarket parts should be made by a reputable manufacturer.

• What's Included: Typically, the compressor itself is included. Some may come with oil already added, but you'll likely need to add more. Some might include a new clutch or pulley. Check the product description carefully.

• Difficulty Level: Intermediate. It requires some mechanical knowledge and experience working on car AC systems.

• Estimated Time: 3-5 hours.

• Special Tools Needed:
• AC manifold gauge set
• Vacuum pump
• Refrigerant recovery machine
• Socket set
• Wrench set
• Torque wrench

• Critical Steps and Tips:

1. Recover the refrigerant from the system.
2. Disconnect the battery.
3. Remove the old compressor.
4. Install the new compressor, adding the correct amount of oil.
5. Replace the receiver drier/accumulator.
6. Evacuate the system with a vacuum pump for at least 45 minutes.
7. Charge the system with the correct amount of refrigerant.

• DIY or Professional?: Professional installation is recommended. AC systems are complex, and improper installation can damage the compressor or other components. You also need specialized equipment to recover and charge the refrigerant.

• Used OEM: These are original factory parts that have been removed from another vehicle. They offer great value because they are genuine parts at a lower price. They are tested and inspected to ensure they are working properly.

• Refurbished OEM: These are original factory parts that have been professionally restored. They have been cleaned, inspected, and repaired with new components like seals and bearings.

• New Aftermarket: These are brand new parts made by a third-party manufacturer. They are built to meet or exceed OE specifications.

• Parts that are commonly replaced or checked:
• Receiver drier/accumulator
• Expansion valve
• Orifice tube
• Condenser

• Replacing these parts helps prevent repeat failures because they can become contaminated with debris from a failing compressor. The receiver drier/accumulator removes moisture from the system, and the expansion valve/orifice tube controls refrigerant flow. A clogged or damaged condenser can also put extra strain on the compressor.

• How Long It Lasts: A car AC compressor typically lasts 8-12 years or 100,000-150,000 miles.

• Factors Affecting Longevity: Regular maintenance, like checking the refrigerant level and having the system serviced, can extend its life. Driving habits, climate, and the quality of the compressor also play a role.

• Budget: Used OEM - $100 - $250
• Mid-Range: Refurbished OEM - $200 - $400
• Premium: New Aftermarket - $300 - $600

• Labor Costs: Labor costs for AC compressor replacement typically range from $200 to $500, depending on the shop and the complexity of the job.

• Total Job Cost: Expect to pay between $300 and $1100 for the entire job, including the compressor, labor, and refrigerant.

• Some 2020-2025 Buick Encore GX and Chevrolet Trailblazer models have had issues with AC compressor failure due to internal leaks. Check for any Technical Service Bulletins (TSBs) related to the AC system on your specific vehicle. Some owners have reported unusual noises coming from the AC compressor before it fails completely.

• How to Confirm Proper Operation: After installation, turn on the AC and check that cold air is blowing from the vents. Use a thermometer to measure the vent temperature. It should be significantly lower than the outside temperature.

• What to Look/Listen For: Listen for any unusual noises from the compressor. Make sure the AC clutch is engaging and disengaging smoothly. Check the refrigerant pressure with a manifold gauge set to ensure it's within the correct range.

• Q: How do I know if my AC compressor is bad?
• A: Common signs include warm air blowing from the vents, unusual noises from the compressor, and the AC clutch not engaging.

• Q: Can I replace the AC compressor myself?
• A: It's possible, but it requires specialized tools and knowledge of AC systems. Professional installation is recommended.

• Q: What else should I replace when replacing the AC compressor?
• A: It's recommended to replace the receiver drier/accumulator and inspect the expansion valve/orifice tube.

• Q: How much does it cost to replace an AC compressor?
• A: The total cost can range from $300 to $1100, including the compressor, labor, and refrigerant.

• Q: What's the difference between a used, refurbished, and new AC compressor?
• A: Used compressors are original factory parts that have been removed from another vehicle. Refurbished compressors are original factory parts that have been professionally restored. New aftermarket compressors are brand new parts made by a third-party manufacturer.

OEM Part Numbers:

• GM: 42733186, 42769582

Fits Years: 2021 2022 2023 2024 2025