Dealing with bizarre electrical issues in your GMC Terrain or other GM vehicle? One minute the power windows work, the next they don’t. The dashboard lights up with random warnings, or worse, the vehicle refuses to start. As a technician with over two decades of experience, I’ve seen these frustrating, hard-to-diagnose problems countless times. More often than not, the culprit is a failing Body Control Module (BCM).
The BCM is the central hub for your vehicle’s body electronics. It manages everything from your interior lights and power locks to your security system and communication with other modules. When it starts to fail, it creates a cascade of confusing symptoms. A trip to the dealership often means a hefty bill for diagnostics, the part itself, and mandatory programming. Our service is designed to be the definitive, cost-effective solution.
Is Your Vehicle Showing These Symptoms of BCM Failure?
A faulty BCM can make you feel like your car is haunted. If you’re experiencing any of the following, this module is very likely the solution you need:
- ✔ Erratic or non-functional power windows, door locks, or mirrors.
- ✔ Interior dome lights or exterior lights staying on or not turning on at all.
- ✔ The security system acting up, causing intermittent no-start conditions.
- ✔ Horn honking randomly or not working when pressed.
- ✔ Dash warning lights (like Airbag or ABS) appearing without a clear cause.
- ✔ Communication-related Diagnostic Trouble Codes (DTCs), often in the U-series (e.g., U0140, U0155).
A Technician’s Notebook: The Case of the Confused Equinox
A customer brought in a 2015 Equinox (which uses the same BCM as the Terrain) with a truly baffling list of complaints. The radio would change stations on its own, the driver’s side window wouldn’t go down, and the anti-theft light would flash, preventing it from starting about once a week. They had already replaced the battery and checked all the fuses. After connecting my scan tool, I found a dozen communication codes pointing to a network failure. Instead of a complex wiring issue, my experience pointed straight to the BCM. We performed this exact cloning service, and the customer had their fully functional vehicle back the next day—no more electrical gremlins.
How Our Plug-and-Play Programming Service Works
We take the complexity out of the repair. Instead of you needing a high-end scan tool or a trip to the dealer, we handle the critical programming for you. The process is simple:
- You purchase this service and we contact you with shipping instructions.
- You ship your original, faulty BCM to our facility.
- Our expert technicians transfer all the vital vehicle-specific data (VIN, key information, security settings) from your old module to this replacement unit.
- We ship the newly programmed, plug-and-play BCM back to you, ready for installation.
This cloning process ensures that the replacement module is a perfect electronic match for your vehicle, preserving all original functions and settings. And with our no core charge policy, you can keep your original module.
A Straightforward Guide to Your BCM Installation
Replacing the BCM is a manageable job for a DIY enthusiast. While the exact location varies slightly by model, the process is generally similar. For the 2013-2017 Terrain BCM, it’s typically found on the left (driver’s) side of the dash.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes before starting work.
- Locate the BCM: On most compatible models, you’ll need to remove the lower dash panel or kick panel on the driver’s side to access the module.
- Disconnect the Connectors: Carefully release the locking tabs on each wiring harness connector and pull them straight out from the module. Do not force them.
- Remove the Old Module: Unbolt or unclip the original BCM from its mounting bracket.
- Install the New Module: Mount your pre-programmed replacement BCM in the same location and securely reconnect all wiring harnesses. You should hear a ‘click’ as they lock in place.
- Final Steps: Reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all functions—lights, locks, windows, etc.
Important Post-Installation Notes
While our programming makes this a plug-and-play fix, some vehicle systems may require a quick sync-up:
- 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 is only necessary if the light appears.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration might be needed to ensure flawless brake light and traction control operation.
Disclaimer: Vehicle systems vary. Always have a factory service manual for your specific model on hand or consult a qualified professional if you are unsure about any step.
Guaranteed Vehicle Compatibility
This BCM is a direct replacement for part numbers 13584695, 13586273, 13580697, 13588447, 13589197, 13589324, and 13589325. It is verified to fit the following vehicles:
- ✔ 2013-2017 GMC Terrain (LH side dash)
- ✔ 2013-2017 Chevrolet Equinox (LH side dash)
- ✔ 2013-2017 Buick Verano (Below center of dash)
- ✔ 2013-2014 Buick Encore (LH side of dash)
- ✔ 2013-2014 Cadillac SRX (LH dash)
- ✔ 2013 Chevrolet Malibu (LH kick panel)
- ✔ 2013 Buick Regal (LH dash)
- ✔ 2013-2016 Chevrolet Cruze (LH kick panel)
- ✔ 2013-2014 Chevrolet Trax (LH side of dash)
- ✔ 2014-2015 Chevrolet Spark (Gasoline model, left lower a-pillar)
- ✔ 2013 Chevrolet Volt (RH engine compartment)
- ✔ 2013-2014 Chevrolet Orlando (Below center console)
Frequently Asked Questions
How does the cloning/programming process work after I order?
After you place your order, we will contact you via the information on your account with detailed instructions on how to package and ship your original BCM to us. Once we receive it, we typically complete the programming and ship your replacement BCM back within 1-2 business days.
Do I need to send my keys with the BCM?
No, you do not need to send your keys. All the necessary security and key data is stored within the BCM itself, and our cloning process transfers this information directly to the new module.
Is this a guaranteed fix for my vehicle’s problems?
This service corrects issues caused by a faulty BCM. While the symptoms we’ve listed are classic signs of BCM failure, we always recommend proper diagnostics to confirm the BCM is the root cause before ordering.
What if I install it and still have problems?
First, check if any post-install procedures like the airbag or brake relearns are needed. If issues persist, it may indicate another problem with the vehicle (e.g., wiring, another module). Our programming service ensures the BCM itself is 100% ready for your vehicle.
Why is your service better than going to a dealership?
Our service saves you significant money by avoiding high dealership labor rates and programming fees. You receive a module that is ready to install right out of the box, saving you time, money, and the hassle of towing your vehicle to a service center.