OEM Body Control Module for 2016-2024 Buick, Cadillac, Chevrolet, & GMC

Buying a replacement BCM can be tricky. Here's what to look for:

• What to Look For:
• Make sure the part is compatible with your car's year, make, and model.
• Check the part's condition. Look for any signs of damage or corrosion.
• Ask about the seller's warranty or return policy.

• Quality Indicators:

• What's Included:
• The BCM itself.
• Sometimes, installation instructions (though these are often generic).
• Check if programming is required. Some BCMs need to be programmed to your specific vehicle.

Replacing a BCM can range from simple to complex.

• Difficulty Level and Estimated Time:
• Difficulty: Medium to High
• Estimated Time: 1-3 hours

• Special Tools Needed:
• Basic hand tools (sockets, wrenches, screwdrivers)
• Scan tool for clearing codes and possibly programming the new BCM
• Multimeter for testing electrical connections

• Critical Steps and Tips:

1. Disconnect the negative battery cable.
2. Locate the BCM (usually under the dashboard or in the center console).
3. Disconnect the wiring harness connectors.
4. Remove the old BCM.
5. Install the new BCM.
6. Reconnect the wiring harness connectors.
7. Reconnect the negative battery cable.
8. Use a scan tool to clear any diagnostic trouble codes (DTCs).
9. Program the new BCM if required.

• DIY or Professional Installation:
• DIY is possible if you have experience with automotive electrical systems and a scan tool.
• Professional installation is recommended if you're not comfortable working with electrical systems or if the BCM needs to be programmed.

You have a couple of choices when buying a replacement BCM:

• Used OEM:
• These are original factory parts that have been removed from other vehicles.
• They offer the best value because they're genuine parts that have been tested and inspected, but cost less than new parts.

• New Aftermarket:
• These are brand new parts made by third-party manufacturers.
• They're built to meet or exceed original equipment (OE) specifications.

When replacing a BCM, it's a good idea to check these related parts:

• Fuses: A blown fuse could have caused the BCM to fail in the first place.
• Wiring Harness: Damaged or corroded wiring can also cause BCM problems.
• Battery: A weak battery can cause electrical issues that affect the BCM.

Replacing these parts at the same time can prevent repeat failures and save you time and money in the long run.

A BCM typically lasts for:

• Lifespan: 10-15 years or more.

Factors that can affect its longevity:

• Environmental Conditions: Extreme temperatures and humidity can shorten its lifespan.
• Electrical Problems: Surges, shorts, and other electrical issues can damage the BCM.
• Water Damage: Water intrusion can cause corrosion and failure.

The cost of a replacement BCM can vary:

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

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

• Total Job Cost Estimate:
• Used OEM: $150 - $500
• New Aftermarket: $200 - $600

Some 2018-2024 Buick, Cadillac, Chevrolet, and GMC vehicles have known issues related to the BCM:

• Some models have experienced problems with the BCM causing intermittent electrical issues, such as lights flickering or the radio cutting out.
• Check for any Technical Service Bulletins (TSBs) related to the BCM on your specific vehicle. These TSBs may provide information on common problems and solutions.
• Some owners have reported that the BCM can be sensitive to voltage fluctuations, so it's important to ensure that the battery and charging system are in good condition.

After installing the new BCM:

• Confirm Proper Operation:
• Check all the electrical systems that the BCM controls, such as the lights, windows, door locks, and radio.
• Make sure all the systems are working correctly.

• What to Look/Listen For:
• No error messages or warning lights on the dashboard.
• All electrical systems functioning smoothly and reliably.
• No unusual noises or behavior from the car's electrical components.

Q: Will this BCM need to be programmed to my car?
A: It depends. Some BCMs are plug-and-play, while others need to be programmed to your specific vehicle using a scan tool. Check with the seller or a qualified mechanic to be sure.

Q: How do I know if the BCM is really the problem?
A: Have a qualified mechanic diagnose the problem. They can use a scan tool and other diagnostic equipment to pinpoint the source of the issue.

Q: What happens if I install the BCM incorrectly?
A: Installing the BCM incorrectly can damage the part or your car's electrical system. It's best to have a professional install it if you're not comfortable doing it yourself.

Q: Is a used OEM BCM reliable?
A: Yes, used OEM BCMs can be reliable. They are genuine factory parts that have been tested and inspected. Plus, they're more affordable than new parts.

Q: What kind of warranty comes with a used BCM?
A: Warranty varies by seller. Check the seller's warranty policy before you buy.

OEM Part Numbers:

• GM: 13518765, 13518770, 13518835, 13518836, 13518841, 13558723

Fits Years: 2016 2017 2018 2019 2020 2021 2022 2023 2024