Tired of Your Truck’s Electrical Gremlins?
If your GMC Sierra or another GM truck is acting possessed—with flickering lights, a dead climate control system, or random warning messages—the culprit is often a failing Body Control Module (BCM). As the central command for your vehicle’s body electronics, a faulty BCM can cause a cascade of frustrating and seemingly unrelated problems. I’ve seen it hundreds of times in the shop: a perfectly good engine and transmission sidelined by a module that can’t manage the basics. This isn’t just an annoyance; it can affect safety systems and your truck’s core reliability.
This replacement Body Control Module, equivalent to part number 15263497, is the definitive solution. We pre-program it to your truck’s specific Vehicle Identification Number (VIN) before shipping. This means it arrives ready for a true plug-and-play installation, eliminating the need for expensive dealership programming. You get a reliable fix that restores full functionality and peace of mind, whether you’re a seasoned mechanic or a DIYer tackling the job in your driveway.
A Technician’s Notebook
A customer’s 2013 Sierra 3500 came in last week with a classic case of BCM failure. The dashboard was lit up like a Christmas tree, the radio would cut out, and the airbag light (DTC B1001) refused to clear. The owner had already replaced the battery and checked fuses, getting nowhere. After confirming power and grounds to the BCM connector were solid, we knew the module itself was the issue. A quick swap with one of our VIN-programmed units solved every single problem instantly. The key takeaway: always check the main BCM ground strap during replacement. A poor ground is a common cause of repeat failures, and securing it properly ensures a lasting repair.
Is Your Truck Showing These Symptoms?
A failing BCM can manifest in numerous ways. If you’re experiencing any of the following, it’s a strong indicator that your module needs attention. Here are the most common signs I diagnose in my bay:
- ✔ Airbag warning light is on, often with a DTC B1001 code that won’t reset.
- ✔ Power windows, door locks, or mirrors operate intermittently or not at all.
- ✔ The HVAC system is unresponsive, or the blower motor works sporadically.
- ✔ Vehicle security system malfunctions, leading to no-start conditions or false alarms.
- ✔ Headlights, taillights, or interior dome lights flicker, stay on, or won’t turn on.
- ✔ The instrument cluster displays incorrect information or warning messages.
- ✔ Communication errors with other modules, leading to a host of confusing diagnostic codes.
Your Straightforward Guide to Installation
Replacing the 2013 Sierra 3500 Body Control Module is a job most owners can handle in under 15 minutes with basic tools. It’s located in a relatively easy-to-access spot, getting you back on the road quickly.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate the BCM: On most GM trucks and SUVs of this era, the BCM is found under the driver’s side dashboard, to the left of 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 module. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the old BCM from its mounting bracket.
- Install the New Module: Seat the new, pre-programmed BCM into the mounting bracket and plug in the electrical connectors. Ensure they click securely into place.
- Reconnect and Test: Reconnect the negative battery terminal. Start the vehicle and test all the functions that were previously malfunctioning—windows, locks, lights, HVAC, etc.
Important Post-Installation Steps: For a complete repair, some systems may need to be re-synced. If the airbag light remains on, use a professional scan tool to perform the ‘Setup SDM Primary Key in BCM’ function. Some vehicles may also require a brake pedal position sensor recalibration to ensure proper brake light operation and stability control performance.
Verified Vehicle Compatibility
This module is a direct-fit replacement for a wide range of General Motors trucks and SUVs, ensuring OEM-level performance. It is interchangeable with numerous part numbers, including 15263497, 25835966, 15263363, and more. Please verify your model and year from the list below.
AVALANCHE 1500 07-11
SILVERADO 1500 PICKUP 07-11 (07 new style)
SILVERADO 2500 PICKUP 07-11 & 13 (07 new style)
SILVERADO 3500 PICKUP 07-11 & 13 (07 new style)
SUBURBAN 1500 07-11 | SUBURBAN 2500 07-11
TAHOE 07-11
SIERRA 1500 PICKUP 07-11 (07 new style)
SIERRA 2500 PICKUP 07-11 & 13 (07 new style)
SIERRA 3500 PICKUP 07-11 & 13 (07 new style)
SIERRA DENALI 07-10 | SIERRA DENALI 1500/2500/3500 11 & 13
YUKON 07-11 | YUKON XL 1500 07-11 | YUKON XL 2500 07-11
Frequently Asked Questions
Do I need to take my truck to the dealership after installing this BCM?
No. This Body Control Module is pre-programmed to your vehicle’s VIN. This means it’s ready for installation right out of the box, saving you the time and expense of a dealer visit for programming.
What tools are required for the installation?
Basic hand tools are all that’s needed. Typically, a simple socket set to remove the lower dash panel and the module’s mounting bolts is sufficient. The entire process usually takes less than 15 minutes.
Will this fix my airbag light with code B1001?
Yes, a faulty BCM is a very common cause of the B1001 code. Replacing the module should resolve the root cause. However, after installation, you will need to use a capable scan tool to perform the ‘Setup SDM Primary Key in BCM’ procedure to clear the light.
What is the warranty on this part?
This part comes with a one-year warranty, giving you confidence in the quality and reliability of your repair.
Is there a core charge for my old part?
No, there is no core charge. You can keep your old part or dispose of it without the hassle of returning it.