Tired of Unpredictable Electronics in Your GM Truck?
If you’re dealing with a 2013 GMC Sierra or another GM truck that seems to have a mind of its own—flickering lights, a dead climate control panel, or power windows that won’t budge—you’re likely facing a failing Body Control Module (BCM). As the electronic nerve center for your vehicle’s comfort and convenience features, a faulty BCM can cause a cascade of frustrating, hard-to-diagnose problems. This isn’t just an annoyance; it can affect vehicle security and safety systems. Our replacement BCM, equivalent to part number 15263497, is the definitive, hassle-free solution.
We take the guesswork and dealership expense out of the equation. Each module is expertly programmed to your vehicle’s specific VIN before it ships, ensuring it integrates seamlessly with your truck’s existing systems. This is a true plug-and-play fix that restores full functionality right out of the box, letting you get back on the road with confidence.
From the Diagnostic Bay: The Case of the Haunted Sierra
A customer brought in his 2013 Sierra Denali with a list of bizarre symptoms: the radio would cut out, the A/C blower worked only on high, and the security light would flash randomly, sometimes preventing the truck from starting. He’d already replaced the battery and checked the fuses. After connecting my scanner, I saw a dozen communication codes (U-codes) and a specific BCM internal failure code. In my 20+ years of experience, these ghost-in-the-machine issues on GMT900 platforms almost always point to the BCM. Instead of a costly diagnostic and programming session at the dealer, we installed one of our VIN-programmed modules. The entire swap took less than 10 minutes. All the ghost problems vanished, and the truck ran perfectly. This is the exact fix we provide directly to you.
Is Your Truck Showing These Common BCM Failure Signs?
- ✔ Power windows, door locks, or interior/exterior lights behaving erratically or not working at all.
- ✔ The HVAC system is unresponsive, or the blower motor is stuck on one speed or won’t turn on.
- ✔ An active airbag warning light, often accompanied by Diagnostic Trouble Code (DTC) B1001.
- ✔ The anti-theft or security system malfunctions, causing no-start conditions or stalling.
- ✔ Unexplained battery drain or issues with grounding that persist after checking main connections.
- ✔ Multiple communication DTCs pointing to a loss of connection with various modules.
A Straightforward Guide to Installation
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- ✔ Locate the BCM: On most 2007-2013 GM trucks and SUVs, you’ll find the BCM mounted under the driver-side dashboard, near the steering column. It’s typically held in place by clips or a few small bolts.
- ✔ Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs that need to be depressed. Once disconnected, remove the old BCM from its mounting bracket.
- ✔ Install the New Module: Seat your new, pre-programmed 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 negative battery terminal. Turn the key to the ‘On’ position and test all body functions—lights, locks, windows, wipers, and HVAC—to confirm everything is working correctly.
- ✔ Post-Install Check: If the airbag light remains on, a simple “Setup SDM Primary Key in BCM” procedure may be needed using a capable diagnostic scanner. This syncs the new BCM with the airbag system.
Verified Vehicle Compatibility
This module is a direct-fit replacement for a wide range of General Motors trucks and SUVs. It is interchangeable with part numbers 25844480, 25835966, 15263363, 15878753, and others. It fits models including:
CADILLAC ESCALADE, ESV, EXT 07-11
CHEVROLET SILVERADO 1500/2500/3500 PICKUP 07-13
GMC SIERRA 1500/2500/3500 PICKUP 07-13
GMC SIERRA DENALI 1500/2500/3500 07-13
CHEVROLET SUBURBAN 1500/2500 07-11
CHEVROLET TAHOE 07-11
GMC YUKON & YUKON XL 1500/2500 07-11
Note: For 2007 models, this fits the ‘new style’ with a smooth door skin. Please verify your part number or contact us with your VIN to ensure compatibility.
Frequently Asked Questions
Frequently Asked Questions
Do I need to take this module to a dealer for programming?
No. We pre-program the module to your vehicle’s VIN before shipping. It arrives ready for installation, saving you hundreds in dealership fees and programming time.
What if my airbag light is on after I install it?
This is a common, and usually simple, fix. It means the new BCM needs to be electronically introduced to the airbag system (SDM). This requires a professional scan tool to perform the ‘Setup SDM Primary Key in BCM’ function, which takes just a minute.
Is there a core charge for my old part?
Absolutely not. There is no core charge, and you do not need to send your old, faulty module back to us.
What tools are required for installation?
Basic hand tools are all you need. Typically, a small socket set or nut driver to remove the lower dash panel and potentially the BCM bracket bolts is sufficient. The installation itself is plug-and-play.
Will this fix my intermittent no-start problem?
In many cases, yes. The BCM controls the Pass-Key/Pass-Lock anti-theft system. When it fails, it can incorrectly prevent the vehicle from starting. Replacing a faulty BCM is a common solution for these security-related starting issues.