OEM Body Control Module for 2019-2025 Buick, Cadillac, Chevrolet, & GMC

What to Look For When Buying

• Compatibility: Make sure the BCM is designed for your specific year, make, and model vehicle.
• Condition: If buying a used BCM, check for any signs of damage or corrosion.
• Warranty: Look for a warranty to protect against defects or premature failure.

Quality Indicators

• OEM Part: OEM (Original Equipment Manufacturer) parts are made by the same manufacturer as the original part in your vehicle.
• Testing: If buying a used BCM, make sure it has been tested and is confirmed to be working.
• Reputation: Buy from a reputable seller with good reviews.

What's Typically Included

• The Body Control Module itself
• Sometimes, installation instructions or diagrams are included.

Difficulty Level and Estimated Time

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

Special Tools Needed

• Socket set
• Screwdrivers
• Scan tool (for programming)
• Multimeter (optional, for testing)

Critical Steps and Tips

1. Disconnect the Battery: Always disconnect the negative battery cable before working on electrical components.
2. Locate the BCM: The BCM is usually located under the dashboard or in the center console. Refer to your vehicle's repair manual for the exact location.
3. Disconnect Connectors: Carefully disconnect all electrical connectors from the BCM.
4. Remove the Old BCM: Remove any screws or fasteners holding the BCM in place.
5. Install the New BCM: Install the new BCM in the reverse order of removal.
6. Reconnect Connectors: Reconnect all electrical connectors to the BCM.
7. Reconnect the Battery: Reconnect the negative battery cable.
8. Programming: The new BCM may need to be programmed to your vehicle using a scan tool.
9. Test: Test all electrical functions to make sure the new BCM is working properly.

DIY vs. Professional Installation

• DIY is possible if you have experience working on automotive electrical systems and have access to a scan tool for programming. However, professional installation is recommended if you are not comfortable working on electrical systems or do not have the necessary tools.

Compare: Used OEM, New Aftermarket

Used OEM

• Best value option.
• Genuine factory parts.
• Tested and inspected.
• Significantly lower prices than new.

New Aftermarket

• Brand new parts.
• Built to OE specifications.
• Manufactured by third-party companies.

Parts Commonly Replaced or Checked

• Fuses: Blown fuses can cause the BCM to malfunction.
• Relays: Relays control various electrical circuits in the vehicle.
• Wiring Harness: Damaged wiring can cause electrical problems.
• Battery: A weak or dying battery can cause electrical issues.

Why Replacing Related Parts Prevents Repeat Failures

• Replacing related parts can prevent repeat failures by addressing the underlying cause of the problem. For example, if a blown fuse caused the BCM to fail, replacing the fuse will prevent the new BCM from failing as well.

How Long This Part Normally Lasts

• A BCM can last for the entire lifespan of the vehicle, which can be 10-15 years or more.

Factors That Affect Longevity

• Environmental conditions (humidity, temperature)
• Electrical surges or spikes
• Water damage
• Quality of the original part

Budget vs. Mid-Range vs. Premium Options

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

Labor Cost Considerations

• Labor costs can range from $100 to $300, depending on the mechanic's hourly rate and the complexity of the installation.

Total Job Cost Estimates

• Used OEM + Labor: $150 - $450
• New Aftermarket + Labor: $200 - $600

Known Issues

• Some vehicles may experience issues with the BCM causing intermittent electrical problems, such as power windows not working or the security system malfunctioning.
• Check for any Technical Service Bulletins (TSBs) related to the BCM on your specific vehicle. These bulletins can provide information about known issues and recommended solutions.

How to Confirm Proper Operation

• Use a scan tool to check for any diagnostic trouble codes (DTCs).
• Test all electrical functions, such as power windows, door locks, lights, and wipers.

What to Look/Listen For

• Make sure all electrical functions are working smoothly and without any issues.
• Listen for any unusual noises or clicking sounds from the BCM.
• Verify that the security system is functioning properly.

Q: Will this BCM need to be programmed to my vehicle?
A: Yes, in most cases, a new BCM will need to be programmed to your vehicle using a scan tool. This is to ensure that the BCM is compatible with your vehicle's other systems.

Q: What happens if I don't program the BCM?
A: If you don't program the BCM, some or all of your vehicle's electrical functions may not work properly.

Q: How do I know if this BCM is compatible with my vehicle?
A: Check the compatibility information to make sure it's designed for your specific year, make, and model.

Q: What is the difference between a used OEM BCM and a new aftermarket BCM?
A: A used OEM BCM is a genuine factory part that has been previously used, while a new aftermarket BCM is a brand new part manufactured by a third-party company.

Q: Is it difficult to install a BCM myself?
A: Installing a BCM can be challenging, especially if you don't have experience working on automotive electrical systems. Professional installation is recommended if you are not comfortable with this type of work.

OEM Part Numbers:

• Other: 13518593, 13518626, 13518628, 13532662, 13534192, 13535989, 13535993, 844, 84469210

Fits Years: 2019 2020 2021 2022 2023 2024 2025