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

What to Look For When Buying:

• Correct part: Make sure it's the right part for your car's year, make, and model.
• Condition: If buying a used part, check for any signs of damage or corrosion.
• Warranty: See if the part comes with a warranty. This protects you if the part fails soon after you buy it.

Quality Indicators:

What's Included:

• The Body Control Module (BCM) itself.
• Sometimes, you might get the mounting hardware.

Difficulty Level and Estimated Time:

Replacing a BCM is usually a medium-level job. It can take 1-3 hours, depending on your experience.

Special Tools Needed:

• Socket set
• Screwdrivers
• Scan tool (to program the new BCM)

Critical Steps and Tips:

1. Disconnect the battery: Always disconnect the negative battery cable before working on electrical parts.
2. Locate the BCM: The BCM is usually under the dashboard or in the center console.
3. Remove the old BCM: Unplug the connectors and remove any screws or clips holding it in place.
4. Install the new BCM: Plug in the connectors and secure it with screws or clips.
5. Reconnect the battery: Reconnect the negative battery cable.
6. Program the BCM: You'll likely need a scan tool to program the new BCM to your car. This step is very important!

DIY or Professional Installation:

If you're comfortable working on cars and have a scan tool, you might be able to do it yourself. However, programming the BCM can be tricky. If you're not sure, it's best to have a professional install it.

Used OEM:

• Best Value: You get a genuine factory part that was made for your car.
• Tested and Inspected: These parts are usually tested to make sure they work.
• Lower Price: Used OEM parts are much cheaper than new parts.

New Aftermarket:

• Brand New: You get a brand new part that has never been used.
• Built to OE Specs: Aftermarket parts are designed to work like the original part.
• Wide Range of Brands: You have many different brands to choose from.

Parts Commonly Replaced or Checked:

• Fuses: Blown fuses can cause the BCM to fail.
• Relays: Relays control power to different parts of the car.
• Wiring Harness: Damaged wires can cause problems with the BCM.
• Battery: A weak battery can cause electrical problems.

Why Replace Related Parts:

Replacing these parts at the same time can help prevent future problems. If a bad fuse or relay caused the BCM to fail, replacing it will help protect the new BCM.

How Long This Part Normally Lasts:

A Body Control Module can last for the life of the car, which is usually 10-15 years or more.

Factors That Affect Longevity:

• Water damage: Water can shorten the life of the BCM.
• Electrical surges: Surges can damage the BCM's electronics.
• Quality of the part: A high-quality BCM will usually last longer.

Budget vs Mid-Range vs Premium Options:

• Used OEM: $75 - $250
• New Aftermarket: $150 - $400

Labor Cost Considerations:

Labor costs can range from $100 to $300, depending on the shop and the complexity of the job.

Total Job Cost Estimates:

• Used OEM + Labor: $175 - $550
• New Aftermarket + Labor: $250 - $700

Known Issues:

Some 2023-2025 Buick, Cadillac, Chevrolet, GMC, and Honda vehicles have had issues with the Body Control Module causing problems with the lights, windows, and door locks.

TSBs or Common Complaints:

Check online forums and the National Highway Traffic Safety Administration (NHTSA) website for any Technical Service Bulletins (TSBs) or common complaints related to the BCM in your specific vehicle. This can give you more information about potential problems.

How to Confirm Proper Operation:

• Check all functions: Test all the things the BCM controls, like the lights, windows, door locks, wipers, and alarm.
• Look for warning lights: Make sure there are no warning lights on the dashboard related to the BCM.
• Use a scan tool: A scan tool can check for any error codes.

What to Look/Listen For:

• Make sure the lights turn on and off correctly.
• Check that the windows go up and down smoothly.
• Test the door locks to make sure they work.
• Listen for any strange noises from the BCM.

Q: Will this BCM need to be programmed to my car?

A: Yes, most likely. Body Control Modules usually need to be programmed to your specific vehicle using a scan tool. This step is important for the BCM to work correctly with your car's other systems.

Q: What happens if I don't program the BCM?

A: If you don't program the BCM, it might not work at all, or some of your car's features (like the lights, windows, or door locks) might not work correctly.

Q: How do I find the BCM in my car?

A: The BCM is usually located under the dashboard or in the center console. Check your car's repair manual for the exact location.

Q: Can I replace the BCM myself?

A: If you're comfortable working on cars and have a scan tool, you might be able to replace the BCM yourself. However, programming the BCM can be tricky. If you're not sure, it's best to have a professional install it.

Q: What if the used BCM I buy doesn't work?

A: Buy from a seller that tests their parts and offers a warranty. This will protect you if the part fails soon after you buy it.

OEM Part Numbers:

• GM: 13537388, 13541621, 13546505, 13550615, 13557467, 13557476, 13559486
• Other: 13559483

Fits Years: 2019 2020 2021 2022 2023 2024 2025