If you’re dealing with baffling electrical issues in your vehicle—like power windows with a mind of their own, flickering dashboard lights, or a horn that won’t stop blaring—you’ve likely met the culprit: a failing Body Control Module (BCM). As a technician with over two decades of experience, I’ve seen how a faulty BCM can turn a reliable car into a source of daily frustration. This isn’t just an inconvenience; it’s a critical component that acts as the central nervous system for your car’s body electronics.
We offer a straightforward and reliable solution. This listing is for a replacement BCM, compatible with part number 13588446 and others, that comes pre-programmed with your vehicle’s original data. The process is simple: you purchase this service, ship your original BCM to our facility, and we handle the rest. We meticulously transfer the essential programming and security information to the replacement unit. This cloning service makes the new module a true plug-and-play part, eliminating the need for expensive and time-consuming dealership programming. Once programmed, we ship the ready-to-install BCM back to you, getting you back on the road quickly and affordably.
Case Study: A Tricky Diagnosis
A customer brought in a 2013 Chevy Spark with a classic case of electrical chaos. The radio would randomly shut off, the interior lights flickered, and occasionally, the car wouldn’t start at all. They had already replaced the battery and checked the alternator. After connecting my scan tool, I found a slew of communication error codes (U-codes) pointing to the BCM. A visual inspection of the original BCM, located at the left lower a-pillar, revealed minor corrosion on the connector pins—a common failure point. By providing a programmed replacement 2013 Spark BCM, we restored all functions perfectly without a single trip to the dealer. The customer was back on the road the same day they received the part.
Common Signs of a Failing BCM
- ✔️ Unpredictable behavior from power windows, locks, or wipers.
- ✔️ Dashboard warning lights illuminating for no reason (e.g., airbag, ABS, security).
- ✔️ The engine cranks but refuses to start due to security system conflicts (anti-theft light may flash).
- ✔️ Interior or exterior lights flickering, staying on, or not working at all.
- ✔️ The key fob not responding or working intermittently.
- ✔️ Diagnostic trouble codes (DTCs) related to communication errors, such as U0140, U0155, or B1001.
A Straightforward Guide to Your BCM Installation
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- ✔ Locate the BCM: On a 2013 Spark, the BCM is typically found behind the trim panel at the left lower a-pillar (driver’s side kick panel area). Location varies for other models listed below.
- ✔ Remove the Old Module: Carefully unplug the electrical connectors. Press the release tabs firmly to avoid damaging them. Then, unbolt the module from its mounting bracket.
- ✔ Install the New BCM: Mount your pre-programmed replacement module and securely reconnect all electrical harnesses. You should hear a ‘click’ as they lock in place.
- ✔ Reconnect the Battery: Re-attach the negative battery terminal.
- ✔ Test All Functions: Start the vehicle and test all related systems: power windows, locks, lights, wipers, and radio to ensure everything is operating correctly.
Important Post-Installation Steps
In some cases, additional synchronization may be needed after installation:
- Airbag System Sync: If the airbag warning light is on, a professional scan tool is required to perform the ‘Setup SDM Primary Key in BCM’ procedure. This syncs the airbag system with the new BCM.
- Brake Pedal Position Relearn: To ensure proper brake light and traction control operation, a brake pedal position sensor relearn might be necessary. This can often be done with a capable bidirectional scan tool.
Disclaimer: Vehicle systems vary. Always refer to a factory service manual or consult a qualified professional if you are unsure about any step.
Verified Vehicle Compatibility
This BCM programming service is compatible with units bearing part numbers 13580696, 123589093, 13588446, 13584692, or 13583542, fitting the following vehicles:
- ✔️ Buick LaCrosse: 2012 (ID 13580696), 2013
- ✔️ Buick Regal: 2012
- ✔️ Buick Verano: 2012
- ✔️ Cadillac SRX: 2012 (ID 13580696)
- ✔️ Chevrolet Camaro: 2012-2013, 2014 (Coupe)
- ✔️ Chevrolet Equinox: 2012
- ✔️ Chevrolet Spark: 2013
- ✔️ Chevrolet Volt: 2012
- ✔️ GMC Terrain: 2012
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 extract the vehicle-specific data and flash it onto the replacement module. This makes it a plug-and-play part for your car, saving you a trip to the dealer.
Do I need to send my original BCM?
Yes, sending your original module is required. This is the only way we can access the unique security and programming information needed to ensure the replacement BCM works perfectly in your vehicle.
Is this a difficult part to install for a DIYer?
For most models, the BCM is accessible behind a kick panel or dash panel. The physical replacement is straightforward, involving a few bolts and electrical connectors. Our cloning service removes the most difficult part—the programming.
What is the turnaround time?
We typically program and ship the replacement module within 1-2 business days of receiving your original BCM. We will send you tracking information as soon as it ships.
Is there a core charge for my old BCM?
No, there is no core charge. After we have cloned the data, you can keep your original module.