The Definitive Fix for Your GM’s Electrical Gremlins
If you’re dealing with bizarre and frustrating electrical issues in your Cadillac SRX, Chevy Cruze, or GMC Terrain, you’ve come to the right place. As a technician with over two decades of experience, I’ve seen firsthand how a failing Body Control Module (BCM) can turn a reliable vehicle into a source of constant headaches. From power windows with a mind of their own to a security system that won’t let you start your own car, the symptoms are often confusing. This isn’t just a part; it’s a solution that restores order to your vehicle’s complex electronic systems.
This service provides a fully programmed Body Control Module, compatible with part number 13505326 and others listed below. We take the critical data from your original, faulty BCM and transfer it directly to this replacement unit. The result? A true plug-and-play module that requires no expensive trip to the dealership for programming. You get your vehicle’s functionality back without the hassle and high costs of factory service.
From the Diagnostic Bay: The Case of the Haunted Equinox
A customer brought in a 2010 Equinox with a list of complaints that sounded like the vehicle was possessed. The radio would turn on by itself, the dome lights would flicker, and occasionally, the car wouldn’t start, displaying a ‘Service Theft Deterrent System’ message. They’d already replaced the battery to no avail. After hooking up my scan tool, I saw multiple communication loss codes (U-codes) pointing to the BCM. These GM platforms are notorious for BCM failure, often due to internal circuit board issues. By providing a cloned BCM, we had the Equinox fixed in an afternoon, saving the customer hundreds compared to the dealership’s quote. This is the exact, reliable fix we offer you.
Common Signs of a Failing GM Body Control Module
A failing BCM is the central command for your vehicle’s body electronics. If you’re noticing any of these issues, your BCM is the likely culprit:
- ✔ Erratic power window or power lock operation.
- ✔ Interior or exterior lights staying on or not working at all.
- ✔ The security system activating randomly or preventing the engine from starting.
- ✔ Horn or alarm sounding unexpectedly.
- ✔ Dash warning lights (like the airbag or traction control) illuminating for no reason.
- ✔ Diagnostic trouble codes (DTCs) related to communication loss, such as U0100, U0140, or other U-codes.
- ✔ Wipers or climate control functions behaving unpredictably.
The Simple Cloning Process
Our service is designed to be straightforward. After you place your order, we will contact you with instructions to ship your original BCM to our facility. Once we receive it, our expert technicians will perform a full data transfer to the replacement module. We then ship the ready-to-install BCM back to you, typically within one business day, and provide you with tracking information. This process ensures all your vehicle’s specific options and key information are retained.
A Straightforward Guide to Your BCM Installation
Installing your new 2010 SRX BCM is a manageable job for a confident DIYer. The BCM is typically located in the driver’s side of the dashboard or kick panel area.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on any electronic components.
- Locate the BCM: On the 2010 SRX, it’s behind the left side of the dash. For other models like the Cruze or Terrain, it may be in the driver’s side kick panel. A quick search for your specific model will confirm the location.
- Remove Trim: Carefully remove any plastic trim panels necessary to access the module.
- Disconnect and Remove: 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 BCM: Mount the new, programmed BCM in place and securely reconnect all electrical connectors. Ensure they click into place.
- Final Steps: Re-install the trim panels and reconnect the negative battery terminal. Start the vehicle to confirm that the electrical issues are resolved.
Important Post-Installation Information
While our programming makes this a plug-and-play solution, some vehicle systems may require a recalibration or sync procedure after the BCM is replaced. This is normal and depends on your vehicle’s specific configuration.
- Airbag System Sync: If the airbag light is on after installation, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure. This syncs the airbag system with the new BCM.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor relearn may be required to ensure correct brake light and traction control operation.
Please note: No core charge is required. You can keep your original module. Always consult a factory service manual or a qualified technician if you are unsure about any step.
Verified Vehicle Compatibility
This module is a direct replacement for several part numbers and fits a range of GM vehicles. Please match your part number or vehicle from the list below to ensure compatibility.
Interchangeable Part Numbers: 13577850, 13505326, 13500384, 13574844, 13504004, 13504494, 13578420
- Cadillac SRX: 2010 (Body Control Module, LH dash)
- Chevrolet Cruze: 2011, 2013 (Body Control Module, LH kick panel)
- Chevrolet Equinox: 2010 (Body Control Module, LH side dash)
- GMC Terrain: 2010, 2011 (Body Control Module, LH side dash)
- Buick Regal: 2011 (Body Control Module, LH dash, w/o opt AUA)
Frequently Asked Questions
How does the programming service work?
After you purchase, we will provide instructions for you to ship your original BCM to us. We then copy the essential vehicle data from your module to the replacement unit and ship it back to you, ready for installation.
Is this really plug and play?
Yes, because we clone your vehicle’s original data, our service eliminates the need for dealer programming. You can install it yourself and it will work with your existing keys and systems. Some minor relearn procedures may be needed post-installation, as noted above.
What is the turnaround time?
We typically program and ship your replacement BCM within one business day of receiving your original module. We will send you tracking information as soon as it’s on its way back to you.
Do I need to send my keys?
No, you do not need to send your keys. All the necessary security information is stored within the BCM itself, which is what we transfer during the cloning process.
Will this fix my specific problem?
This part resolves issues directly caused by a faulty BCM, such as the common electrical symptoms listed above. If you’ve had your vehicle professionally diagnosed or your symptoms strongly match our list, this is the correct solution.