Is Your GMC Terrain Experiencing Strange Electrical Problems?
If your 2010-2011 GMC Terrain or a compatible GM vehicle is acting possessed with random electrical issues, a failing Body Control Module (BCM) is the most likely culprit. The BCM is the central command center for your vehicle’s body electronics, managing everything from power windows and door locks to interior lighting and the security system. When it starts to fail, it can cause a cascade of frustrating and unpredictable problems that can be difficult to diagnose.
From the Diagnostic Bay
We once had a 2011 Equinox (which shares this BCM) come into the shop with what the owner described as a “ghost.” The dome lights would flicker at random, the driver’s side window would only work occasionally, and the key fob would intermittently fail. The owner had already replaced the window switch and a handful of fuses with no success. After a quick scan, we saw multiple communication codes pointing to the BCM. Instead of a costly new module and a day of programming at the dealer, we used our cloning service. By transferring the data from his original, faulty BCM to our replacement unit, we had him back on the road in a fraction of the time and for a fraction of the cost. It’s a perfect example of how targeting the root cause saves time, money, and headaches.
Symptoms of a Failing Body Control Module
A faulty BCM can manifest in numerous ways. If you’re noticing any of the following issues, it’s time to consider a replacement:
- ā Intermittent or non-working power windows, door locks, or mirrors.
- ā Erratic behavior from interior or exterior lights (staying on, not turning on, flickering).
- ā The anti-theft or security system light is on, preventing the engine from starting.
- ā Remote Keyless Entry (RKE) fob stops working or works sporadically.
- ā Instrument cluster gauges behave erratically or warning lights appear without cause.
- ā Windshield wipers activating on their own or not working when commanded.
- ā Horn honking unexpectedly or not working at all.
The Simple, Plug-and-Play Solution for Your 2010-2011 Terrain BCM
Dealerships will charge you for a new module plus several hours of labor to program it to your vehicle’s specific VIN and options. Our unique programming service eliminates this step entirely. We transfer the critical data from your original BCM directly onto this replacement unit. The result is a module that is 100% plug-and-play, ready for immediate installation without any additional programming required.
How Our BCM Programming Service Works:
- ā Purchase this BCM: Complete your order through our secure checkout.
- ā We’ll Contact You: We will reach out to you with simple instructions and a shipping address to send your original BCM to us.
- ā Send Us Your Original Module: You ship your existing BCM to our facility.
- ā We Transfer the Data: Our technicians will professionally clone all the necessary data from your old module to the replacement unit.
- ā Receive Your Ready-to-Install BCM: We ship the programmed replacement BCM back to you, typically within 1-2 business days of receiving your original. You’ll receive tracking information as soon as it’s on its way.
Installation and Post-Install Procedures
Physically installing the BCM is straightforward. It is typically located on the left (driver’s) side of the dashboard or in the driver’s side kick panel. Simply disconnect the battery, remove the electrical connectors from the old BCM, unbolt it, and install the new one in its place. While our programming makes the process simple, some GM vehicles may require one or two minor electronic ‘handshake’ procedures after installation.
- Airbag System Sync: If the airbag warning light is illuminated after installation, a ‘Setup SDM Primary Key in BCM’ procedure must be performed with a professional scan tool. This syncs the new BCM with the airbag system. This is only needed if the light is on.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration may be necessary to ensure proper brake light and traction control functionality.
This BCM is a direct fit for the following part numbers and vehicles:
Part Numbers: 13577850, 13505326, 13500384, 13574844, 13504004, 13504494, 13578420
Compatible Vehicles:
- 2011 Buick Regal (w/o opt AUA)
- 2010-2011 GMC Terrain
- 2010-2011 Chevrolet Equinox
- 2011, 2013 Chevrolet Cruze
- 2010 Cadillac SRX
Frequently Asked Questions
What is a BCM cloning service?
It’s a process where we extract the vehicle-specific software, including the VIN and security information, from your original BCM and transfer it to a replacement unit. This makes the replacement module plug-and-play, avoiding the need for expensive dealer programming.
Why do I have to send you my original BCM?
Your original BCM contains the unique data that allows it to communicate with all the other modules in your specific vehicle. By cloning this data, we ensure the replacement part works perfectly with your existing keys, security system, and electronic options.
Is this module difficult to install?
The physical installation is typically simple, requiring basic hand tools to access the module behind the dash or kick panel. The key benefit of our service is that no programming is needed, but be aware that a relearn procedure for the airbag or brake pedal sensor may be required post-installation.
What happens if my airbag light is on after installation?
This indicates the BCM needs to be synced with the airbag’s Sensing and Diagnostic Module (SDM). A technician with a professional-grade scan tool will need to perform the ‘Setup SDM Primary Key in BCM’ procedure to complete the handshake and turn off the light.
How long does the service take?
Once we receive your original module, our programming and testing process typically takes 1-2 business days. We will then ship the replacement module back to you promptly.