2021 - 2022 Chevrolet Trailblazer Parking Assist Control Module (OEM)

When buying a replacement Parking Assist Control Module, keep these things in mind:

• Make sure the module is designed for your vehicle's year, make, and model.
• Check the module's condition. If buying used, look for signs of damage or corrosion.
• Ask about any warranty or return policy offered by the seller.

Quality indicators to look for:

• For used OEM modules, look for modules that have been tested and inspected.
• For new aftermarket modules, choose reputable brands known for quality parts.
• Check customer reviews and ratings for the seller and the product.

Typically, you'll receive just the Parking Assist Control Module itself. You may need to reuse existing hardware from your old module.

Replacing the Parking Assist Control Module is generally a medium-difficulty job. Estimated time is 1-2 hours.

Special tools you might need:

• Socket set
• Screwdrivers
• Scan tool (to clear any diagnostic trouble codes after installation)

Critical steps and tips:

1. Disconnect the negative battery cable before starting.
2. Locate the Parking Assist Control Module (usually in the trunk or under the rear seat).
3. Disconnect the wiring harness from the module.
4. Remove the old module and install the new one.
5. Reconnect the wiring harness.
6. Reconnect the negative battery cable.
7. Use a scan tool to clear any DTCs and calibrate the system if needed.

While some people can do this job themselves, professional installation is recommended if you're not comfortable working with electrical systems or using a scan tool.

Let's compare your options:

• Used OEM: These are genuine factory parts that have been removed from other vehicles.
• New Aftermarket: These are brand-new parts made by third-party manufacturers.

Used OEM: Offers the best value. You get a genuine factory part that's been tested and inspected, all at a lower price than new.

New Aftermarket: Provides a brand-new part built to meet the original equipment specifications.

Parts that are often replaced or checked at the same time:

• Parking sensors
• Wiring harness for the parking assist system

Replacing these parts can help prevent repeat failures because a faulty sensor or damaged wiring can cause the module to fail again.

A Parking Assist Control Module typically lasts for 5-10 years or more.

Factors that can affect how long it lasts:

• Exposure to water or moisture
• Extreme temperatures
• Electrical problems in the vehicle
• Accidents or impacts

Here's a general idea of price ranges:

• Used OEM: $50 - $200
• New Aftermarket: $100 - $300

Labor costs for professional installation can range from $75 to $200, depending on the shop and your location.

Total job cost estimates:

• Used OEM + DIY: $50 - $200
• Used OEM + Professional Installation: $125 - $400
• New Aftermarket + DIY: $100 - $300
• New Aftermarket + Professional Installation: $175 - $500

Some Buick, Cadillac, Chevrolet, and GMC vehicles have known issues with water intrusion in the trunk area, which can damage the Parking Assist Control Module. Check for any signs of leaks or moisture. Also, some models may require specific programming or calibration after replacing the module.

To make sure the system is working correctly after installation:

1. Start the vehicle and put it in reverse.
2. Listen for the parking assist system to beep or provide visual alerts as you approach objects.
3. Check the dashboard for any error messages related to the parking assist system.
4. Test the system in different parking scenarios to ensure it's working properly.

If the system is not working correctly, double-check your connections and consult a professional.

Q: Will this module need to be programmed after installation?
A: Some vehicles may require programming or calibration after installing a new Parking Assist Control Module. Check your vehicle's service manual or consult a professional.

Q: How do I know if my parking sensors are bad or if it's the module?
A: If only one or two sensors are not working, the sensors themselves may be the problem. If the entire system is not working, the module is more likely to be the cause. A scan tool can help diagnose the issue.

Q: Can I drive my car if the Parking Assist Control Module is bad?
A: Yes, you can still drive your car, but your parking assist system will not function.

Q: Where is the Parking Assist Control Module located?
A: The module is commonly found in the trunk, under the rear seat, or behind a trim panel in the rear of the vehicle. Check your vehicle's service manual for the exact location.

Q: Is it difficult to replace the Parking Assist Control Module myself?
A: The difficulty is medium. If you are comfortable with basic automotive repairs and have the necessary tools, you may be able to do it yourself. Otherwise, professional installation is recommended.

OEM Part Numbers:

• Other: 13532107, 13536789, 39156865, 84448656, 84696756

Fits Years: 2021 2022