Is your 2015-2020 Chevrolet Impala experiencing a host of bizarre electrical issues? From flickering dashboard lights and malfunctioning power windows to random security alerts or even a no-start condition, these are classic signs of a failing Body Control Module (BCM). As a technician with over 20 years of hands-on diagnostic experience, I can tell you that a faulty BCM is often the hidden culprit behind problems that seem impossible to trace.
Don’t let electrical gremlins take over your car. We offer a straightforward and reliable solution: a replacement BCM, part number 13594768, that comes professionally programmed with your vehicle’s specific data. This service eliminates the need for expensive dealership visits and specialized programming tools. The process is simple: after your purchase, you’ll ship your original BCM to our facility. We will then transfer its unique data to this replacement module, ensuring all your vehicle’s options and security information are perfectly matched. We then ship the ready-to-install module back to you.
Signs Your Impala’s BCM is Failing
A BCM is the nerve center for your car’s body electronics. When it starts to fail, the symptoms can be widespread and confusing. Here’s what to look for:
- ✔ Erratic or non-functional interior and exterior lights.
- ✔ Power windows, door locks, or mirrors working intermittently or not at all.
- ✔ The anti-theft or security system light staying on, preventing the car from starting.
- ✔ Dashboard warning lights illuminating for no reason.
- ✔ The radio or climate control system behaving unpredictably.
- ✔ Communication-related Diagnostic Trouble Codes (DTCs), such as U0140, U0155, or B1325, stored in the system.
A Technician’s Notebook: The Ghost in the Machine
I remember a 2017 Impala that came into the shop with a list of complaints that made it sound possessed. The owner said the dome light would fade on and off while driving, the driver’s side window would only work sometimes, and the horn had blared randomly in his garage overnight. He’d already replaced the battery to no avail. After hooking up the scan tool, I saw a dozen communication loss codes with various modules. This pointed directly to the BCM, the central hub for all these components. We installed a cloned BCM, and every single phantom issue vanished. It’s a perfect example of how one failing module can create system-wide chaos.
A Straightforward Guide to Installation
Installing your programmed BCM is a manageable job for a confident DIYer. For your 2015-2020 Impala, the BCM is typically located in the driver’s side of the dashboard.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and wait a few minutes for the system to discharge completely.
- Locate the BCM: On the Impala, you will usually find the BCM to the left of the steering column, often behind the lower dash panel. You may need to remove a trim panel for access.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the module from its mounting bracket.
- Install the New Module: Mount your new, programmed BCM in the exact same position and reconnect all electrical connectors securely. Ensure they click into place.
- Reconnect Power: Reattach the negative battery terminal.
- Perform Final Checks: Start the vehicle and test all functions controlled by the BCM (lights, locks, windows, etc.). Note the post-installation procedures below, as some may be required.
Important Post-Installation Steps
While our programming handles the critical data, some GM vehicles require a final handshake between modules after installation. Be aware of the following potential procedures:
- Airbag System Sync: If the airbag warning light is on after installation, a professional scan tool is needed to perform the “Setup SDM Primary Key in BCM” procedure. This syncs the new BCM with the airbag system.
- Brake Pedal Position Relearn: To ensure proper brake light and stability control function, a brake pedal position sensor relearn might be necessary. This also typically requires a compatible diagnostic tool.
Disclaimer: Vehicle systems vary. Always consult a factory service manual or a qualified technician if you are unsure about any step.
Verified Vehicle Compatibility
This BCM is a direct replacement for part numbers 13594692, 13594768, 13593214, 13580690, 13591519, and 13594769. It is confirmed to fit the following vehicles:
- ATS: 2014
- Caprice / SS Caprice: 2014-2017
- Corvette: 2014
- CTS: 2014 (Sdn, VIN A)
- Escalade / Escalade ESV: 2015
- Impala: 2015-2019
- Sierra 1500 / Denali 1500: 2014
- Sierra 2500 / 3500 / Denali 2500 / Denali 3500: 2015 (ID 13594692)
- Silverado 1500: 2014
- Silverado 2500 / 3500: 2015 (ID 13594692)
- Suburban 1500: 2015
- Tahoe: 2015
- XTS: 2014
- Yukon / Yukon XL 1500: 2015
Frequently Asked Questions
How does the programming service work?
After you place your order, we will provide you with instructions to ship your original BCM to us. We then use specialized equipment to extract the vehicle-specific data and transfer it to the replacement module. This ensures it works correctly with your car’s features and security system.
Do I need to send my original BCM?
Yes, sending your original module is required. This is how we guarantee the replacement part is a perfect match for your vehicle’s software configuration, saving you from needing a trip to the dealer for programming.
Is there a core charge?
No, there is no separate core charge or deposit. The price you pay includes the replacement module and the programming service. You just need to send us your original part for the data transfer.
Will I need any special tools for installation?
For the physical installation, you’ll likely only need basic hand tools like a socket set and trim removal tools. However, as noted, some vehicles may require a professional scan tool for post-installation procedures like an airbag system sync or brake pedal position relearn.
What if an airbag light comes on after I install it?
This is not uncommon on certain GM models. It simply means the new BCM needs to be electronically introduced to the airbag module (SDM). A repair shop with a professional-grade scan tool can perform the ‘Setup SDM Primary Key in BCM’ procedure in a few minutes to resolve this.