Tired of Bizarre Electrical Problems in Your GM Vehicle?
If your 2011 GMC Terrain or a similar GM model is acting possessed—with flickering lights, power windows and locks with a mind of their own, or a frustrating no-start condition—you’ve likely met the culprit: a failing Body Control Module (BCM). As the central command for your vehicle’s body electronics, a faulty BCM can cause a cascade of confusing and unpredictable issues. The dealership solution often involves expensive diagnostics, a costly new module, and programming fees that can quickly add up. We offer a smarter, more direct path back to reliability.
This is a fully tested, replacement BCM that comes pre-programmed with your vehicle’s specific data. Our professional cloning service makes this a true plug-and-play solution. Simply send us your original BCM, and we’ll transfer all the essential information—including VIN, mileage, and key data—to this replacement unit. We then ship it back to you, ready for installation without any need for a trip to the dealer. It’s the most efficient way to solve complex electrical gremlins and get your vehicle functioning correctly again.
From the Diagnostic Bay: The Case of the Phantom Power Drain
I remember a 2011 Terrain that came into my shop with a classic BCM failure story. The owner was frustrated because his battery would die overnight. He’d already replaced the battery and alternator, but the parasitic draw persisted. After hooking up my multimeter, I confirmed a significant draw. By pulling fuses one by one, I isolated the circuit to the BCM. Even with the key off, the module wasn’t ‘sleeping’ properly, keeping other systems awake. We found communication error codes like U0140 (Lost Communication With Body Control Module). Instead of a costly new unit from the dealer, we used a cloned BCM like this one. The swap took less than 30 minutes, the parasitic draw was gone, and the customer was back on the road without the dealership hassle. These modules are notorious for internal shorts and logic failures that cause these exact symptoms.
Is Your Vehicle Showing These Signs of BCM Failure?
- ✔ Power windows, door locks, or interior lights operating erratically or not at all.
- ✔ The security system light stays on, or the engine won’t start (anti-theft engaged).
- ✔ Dashboard warning lights appearing randomly (e.g., airbag, service vehicle soon).
- ✔ Communication Diagnostic Trouble Codes (DTCs) like U0140, U0155, or B1001.
- ✔ Horn, wipers, or radio not functioning as they should.
- ✔ A persistent battery drain that kills the battery overnight.
A Straightforward Guide to Your BCM Installation
Installing your pre-programmed 2011 Terrain BCM is a manageable job for a DIYer with basic tools. The key is that the programming is already done for you!
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the BCM: On a 2011 GMC Terrain or Chevy Equinox, the BCM is typically found on the left (driver’s) side of the dash, often behind the lower dash panel or kick panel. Consult a service manual for the exact location on other models.
- Remove the Old Module: Carefully unplug the electrical connectors. They have locking tabs that need to be depressed. Once unplugged, unbolt or unclip the module from its mounting bracket.
- Install the New Module: Mount the replacement BCM and securely plug in all the electrical connectors. You should hear a ‘click’ as they lock into place.
- Reconnect and Test: Reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all body functions: lights, locks, windows, radio, wipers, etc., to confirm the repair.
Important Post-Installation Notes
In some cases, additional steps may be required after installation:
- Airbag System Sync: If the airbag light is illuminated after the swap, a ‘Setup SDM Primary Key in BCM’ procedure is needed. This requires a professional-grade scan tool to sync the new BCM with the airbag system.
- Brake Pedal Position Relearn: Certain models may require a brake pedal position sensor recalibration to ensure brake lights and traction control function correctly. This is also performed with a capable diagnostic tool.
Disclaimer: Vehicle systems vary. We always recommend consulting a factory service manual or a certified technician if you are unsure about any procedure.
Verified Vehicle Compatibility
This BCM is a direct replacement for several part numbers, including 13583450, 13579004, 13580198, 13582396, 13586856, 13582688, 13586278, 13501737, 13501739, 13577924, 13580773, and 13583451. It fits a wide range of GM vehicles:
- Buick LaCrosse: 2011, 2012
- Buick Regal: 2011
- Cadillac SRX: 2011, 2012
- Chevrolet Camaro: 2011 (Convertible)
- Chevrolet Cruze: 2012
- Chevrolet Equinox: 2011
- Chevrolet Orlando: 2012
- Chevrolet Volt: 2011, 2013
- GMC Terrain: 2011
Frequently Asked Questions
How does the programming service work?
After you place your order, we will contact you with instructions to ship your original BCM to us. Once we receive it, our technicians will clone the essential data onto the replacement module and ship it back to you, typically within 1-2 business days.
Do I need to have a dealer program this part?
No. Because we clone the data from your original module, this part will be plug-and-play. This service completely eliminates the need for expensive dealership programming.
What if my original part number doesn’t match exactly?
This module is compatible with a long list of part numbers. As long as your original part number is in our compatibility list, this module will work for your vehicle.
Is there a core charge or do I need to return my old part?
There is no core charge. We only need your original module to perform the data cloning service. You can keep your original module after the service is complete.
What happens if the airbag light comes on after I install it?
This is uncommon, but if it happens, the BCM needs to be synchronized with the airbag module (SDM). This is a simple procedure called ‘Setup SDM Primary Key in BCM’ that can be done by any shop with a professional diagnostic tool.