Fix Your Truck’s Electrical Headaches for Good
If you’re dealing with a cascade of bizarre electrical problems in your 2013 GMC Sierra 3500, from flickering lights to a dead instrument cluster, you’ve likely met the culprit: a failing Body Control Module (BCM). As the central command for your truck’s body electronics, its failure can be frustrating and difficult to diagnose. This isn’t just a replacement part; it’s a comprehensive solution. We offer a professional Cloning Service where we transfer the exact data from your original BCM to this replacement unit. The result is a true plug-and-play module, eliminating the need for expensive dealership programming and getting your truck back to full operational health.
A Technician’s Notebook: The Case of the Haunted Sierra
I remember a 2011 Sierra 2500 that rolled into my bay with a laundry list of complaints: the radio would turn on and off by itself, the driver’s side power window was dead, and the airbag light was on. The owner had already replaced the battery and checked all the fuses. After connecting my scanner, I saw a dozen communication codes pointing to the BCM. Instead of just swapping the module, which would require a tow to the dealer for programming, we performed a cloning service. Before installing the new unit, I did a quick check of the main BCM ground point under the dash—a common source of issues on these trucks. It was secure. Once the cloned module was installed (a five-minute job), every single issue was resolved instantly. No programming, no follow-up visits. It’s a testament to how an accurate data transfer is the key to a successful BCM replacement.
Is Your Sierra Exhibiting These Electrical Gremlins?
A failing BCM doesn’t always cause a complete shutdown. Often, it presents as a series of annoying and seemingly unrelated issues. Here’s what to look for:
- ✔ Power windows, door locks, or mirrors operating intermittently or not at all.
- ✔ HVAC and climate control functions are unresponsive or behave erratically.
- ✔ The security system acts up, causing no-start conditions or false alarms.
- ✔ An illuminated airbag light, often with a DTC like B1001 (Setup SDM Primary Key in BCM).
- ✔ Headlights, taillights, or interior lights staying on or not turning on.
- ✔ Erratic wiper behavior or a washer pump that won’t activate.
- ✔ Communication errors with other modules on the CAN bus network.
Your Straightforward Installation Guide
Getting your truck back in order is easier than you think. Our cloning service makes the physical installation a breeze.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on electrical components.
- Locate the BCM: On most GM trucks of this era, the BCM is located under the driver’s side of the dashboard, near the steering column. You may need to remove a lower dash panel for access.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that need to be depressed. Once disconnected, unclip or unbolt the module from its mounting bracket.
- Install the New Module: Seat the new, cloned BCM into the mounting bracket and securely plug in all the electrical connectors. You should hear a click as they lock into place.
- Reconnect and Test: Reconnect the battery terminal. Start your truck and test all the functions that were previously malfunctioning—windows, locks, lights, HVAC, etc.—to confirm the repair.
Verified Fitment for Your GM Truck or SUV
This cloning service is compatible with a wide range of General Motors vehicles that use part number 15926094 and other interchangeable parts. Please verify your part number before ordering. This service is for models including:
ESCALADE & ESV & EXT 07-11
SIERRA 1500 / 2500 / 3500 PICKUP 07-13
SIERRA DENALI 1500 / 2500 / 3500 07-13
SILVERADO 1500 / 2500 / 3500 PICKUP 07-13
SUBURBAN 1500 / 2500 07-11
TAHOE 07-11
YUKON & YUKON XL 1500 / 2500 07-11
Note: For 2007 models, this fits the ‘new style’ with a smooth door skin. Some 2010-2013 models may have specific ID requirements (e.g., ID 25835966), which this service covers.
Frequently Asked Questions
How does the BCM Cloning Service work?
It’s simple. After you place your order, you’ll ship your original BCM to us. We use specialized equipment to perform a full data transfer from your old module to the new one. This copies your vehicle’s specific VIN, security information, and option configuration. We then ship both your original module and the ready-to-install replacement back to you.
Do I need to do any programming after installation?
No. Because we clone your original data, the replacement module is 100% plug-and-play. This process bypasses the need for a trip to the dealership for expensive programming with their scan tools.
What if the airbag light is still on after installing the cloned BCM?
In some cases, particularly if the BCM failure triggered the DTC B1001, a post-installation procedure is needed. A professional scan tool is required to perform the ‘Setup SDM Primary Key in BCM’ function. This re-syncs the airbag system (SDM) with the new BCM and will turn off the light.
Is there a core charge or do I get my old part back?
There is absolutely no core charge. We always return your original module along with the newly cloned unit.
What does the BCM actually control on my 2013 Sierra 3500?
The Body Control Module acts as the brain for most non-engine related electronics. This includes your interior and exterior lighting, power windows and locks, security system, wipers, horn, and the HVAC blower motor and controls.