Is Your Vehicle Experiencing Strange Electrical Problems?
The Body Control Module, or BCM, is the central command center for your vehicle’s electronic accessories. It manages everything from your power windows and door locks to the interior lights, security system, and instrument cluster. When the BCM starts to fail, it can create a cascade of confusing and frustrating electrical gremlins that can be difficult to diagnose. If you’re dealing with intermittent issues that seem to have no rhyme or reason, a faulty BCM is often the culprit.
From the Diagnostic Bay
We recently had a 2012 GMC Terrain in the shop with a list of bizarre symptoms. The owner reported that the radio would randomly turn off, the dome light would flicker while driving, and the power locks would sometimes not respond. They had been to two other shops that couldn’t pinpoint the issue. After connecting our diagnostic tool, we saw multiple communication error codes pointing to the BCM. Instead of a costly and time-consuming replacement at the dealer, we provided a cloned module. The customer sent us their original BCM, we transferred the data to the replacement unit, and shipped it back. They installed it in under 30 minutes, and every single electrical issue was resolved. It’s a perfect example of how a failing BCM can mimic a dozen other problems.
Common Symptoms of a Failing BCM
- ✔ Intermittent or non-functional power windows, locks, or mirrors.
- ✔ Interior or exterior lights flickering, staying on, or not working at all.
- ✔ The vehicle’s security system or keyless entry acting erratically.
- ✔ Instrument cluster gauges behaving abnormally or warning lights appearing without cause.
- ✔ Radio or infotainment system randomly shutting off or malfunctioning.
- ✔ A no-start condition where the engine cranks but won’t fire, often related to security system communication.
The Simple, Plug-and-Play Solution
Forget about expensive dealership visits, towing fees, and complex programming procedures. Our service provides a fully programmed GM Body Control Module that is ready for installation right out of the box. We achieve this through a process called cloning. You simply send us your vehicle’s original BCM, and we professionally transfer all the critical data—including the VIN, key information, and specific vehicle options—to this replacement unit. The result is a true plug-and-play module that restores your vehicle’s functionality without any additional programming required.
Installation and Post-Install Considerations
Installation is straightforward for anyone with basic mechanical skills. After installing the module, please be aware of the following potential procedures:
- Airbag System Sync: In some cases, the airbag warning light may illuminate after installation. This is because the new BCM needs to be synchronized with the vehicle’s Sensing and Diagnostic Module (SDM). A professional scan tool is required to perform the ‘Setup SDM Primary Key in BCM’ procedure to clear the light. This is only necessary if the light is on.
- Brake Pedal Position Relearn: Depending on your specific model, a brake pedal position sensor recalibration might be needed to ensure proper operation of the brake lights and traction control system.
Please note: Specific procedures can vary by vehicle. Always consult a factory service manual or a qualified technician for guidance.
Part Number Compatibility and Fitment
This module is a direct replacement for the following part numbers:
- 13580696
- 123589093
- 13588446
- 13584692
- 13583542
It is confirmed to fit 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
GM Body Control Module
Is this a guaranteed fix for my vehicle’s issues?
While this will resolve issues caused by a faulty BCM, it’s crucial to have your vehicle properly diagnosed. The symptoms of a bad BCM can sometimes overlap with other problems, such as wiring or sensor faults. We recommend a professional diagnosis before ordering.