Tired of Unpredictable Electrical Problems in Your GM Vehicle?
As a technician with over two decades of experience, I’ve seen firsthand how a failing Body Control Module (BCM) can turn a reliable car into a source of constant frustration. One minute your power windows work, the next they don’t. The security light flashes for no reason, or worse, the car won’t start at all. These aren’t random glitches; they’re classic signs that the central nervous system of your vehicle’s electronics—the BCM—is failing. This isn’t just an inconvenience; it can be a serious safety issue when lights or other critical systems fail without warning.
We offer a straightforward, reliable solution. Instead of paying dealership prices for a new module and expensive programming fees, you can use our simple mail-in cloning service. You send us your original BCM, and we transfer all its critical data (including VIN, mileage, and key information) to this fully tested replacement unit. The result? You receive a BCM that is 100% plug-and-play, ready to install right out of the box. No trips to the dealer, no special tools, no headaches. It’s the most efficient way to restore your vehicle’s proper function.
Case Study: A Tricky Diagnosis
A customer brought in a 2015 Chevy Malibu with a baffling set of symptoms. The radio would cut out, the interior lights would flicker, and occasionally the turn signals would stop working altogether. They had already replaced the battery and checked the alternator. When I connected my scan tool, I found a series of ‘U’ codes, specifically a U0140 (Lost Communication With Body Control Module). This pointed directly to the BCM. After confirming power and ground to the module were good, we knew the internal logic had failed. Using our cloning service, we programmed a replacement BCM. After a 15-minute install, every single electrical gremlin was gone. It’s a perfect example of how a single component can cause widespread, confusing issues.
Common Signs of a Failing BCM
If you’re experiencing any of the following, a faulty BCM is the likely culprit. A failing module can disrupt communication across your vehicle’s network, often setting diagnostic trouble codes (DTCs) like U0140, U0155, or B1001.
- ✔ Intermittent or non-working power windows, door locks, or interior/exterior lights.
- ✔ False security system alarms or a persistent anti-theft light.
- ✔ Erratic instrument cluster behavior, with gauges dropping out or warning lights coming on.
- ✔ Problems with the radio or climate control systems.
- ✔ A no-start or no-crank condition where the engine won’t turn over.
- ✔ Communication errors with other modules on the vehicle’s data bus.
A Straightforward Guide to Installation
Installing your programmed BCM is a simple process. For the 2014-2016 Spark BCM, it’s typically located behind the left lower a-pillar trim. While locations vary on other models, the general steps are consistent.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before beginning any electrical work.
- Locate the BCM: Find your current BCM. Common locations include under the dash (driver or passenger side), in the kick panel, or behind a side trim panel. For the Spark EV, it’s at the base of the driver’s side A-pillar.
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the module from its mounting bracket.
- Install the Replacement: Mount the new BCM in the same location and securely reconnect all electrical connectors. You should hear a ‘click’ as they lock into place.
- Reconnect Battery: Reattach the negative battery terminal.
- Test and Verify: Start the vehicle and test all body functions—lights, locks, windows, radio, etc.—to confirm everything is working correctly.
Important Post-Installation Notes
While this module is designed to be plug-and-play, some vehicles may require additional steps for full system integration:
- Airbag System Sync: If your airbag warning light is on after installation, a ‘Setup SDM Primary Key in BCM’ procedure may be needed. This requires a professional-grade scan tool to sync the modules.
- Brake Pedal Position Relearn: On certain models, a brake pedal position sensor relearn might be necessary for proper brake light and traction control operation.
- No Core Charge: You are not required to return your old module to us. There is no core charge associated with this purchase.
Disclaimer: Vehicle systems vary. We always recommend consulting a factory service manual or a qualified professional if you are unsure about any step.
Verified Vehicle Compatibility
This BCM is a direct-fit replacement for part number 13589115 and is interchangeable with a wide range of other part numbers. It is guaranteed to fit the following vehicles and options:
- Chevrolet Spark: 2014-2016 (Electric model EV, left lower a-pillar)
- Chevrolet Malibu: 2014-2015 (LH kick panel)
- Chevrolet Malibu: 2016 (VIN 1, Limited, LH kick panel)
- Chevrolet Volt: 2014-2015 (RH engine compartment)
- Chevrolet Camaro: 2014-2015 (RH dash)
- Buick LaCrosse: 2014-2015 (LH kick panel)
- Buick LaCrosse: 2016 (LH kick panel, check ID)
- Buick Regal: 2014-2017 (LH dash)
- Cadillac ELR: 2014-2016 (RH cowl/engine compartment)
- Cadillac SRX: 2014-2016 (LH dash)
Compatible Part Numbers: 13580698, 13578458, 13589115, 13589637, 13590173, 13590851, 13591300, 13592376, 13593775, 13593776, 13594564