Are you chasing down bizarre electrical issues in your GMC Sierra Denali? One minute the radio works, the next it doesn’t. Your power windows have a mind of their own, and a persistent airbag light is on the dash. In my 20+ years of experience, these aren’t separate problems; they’re classic signs of a failing Body Control Module (BCM). This isn’t just an inconvenience—it can affect vehicle safety and security. This module, which interchanges with part number 15878753, is the central command for your truck’s body electronics, and when it falters, chaos ensues.
We offer a definitive, hassle-free solution. Instead of buying a new module and paying for expensive dealership programming, our Cloning Service makes this a true plug-and-play repair. Simply send us your original BCM, and we will professionally transfer all the critical vehicle-specific data—including VIN, mileage, and key information—to this quality replacement unit. We then ship both your original module and the ready-to-install replacement back to you. This process ensures seamless integration with your truck’s existing systems, preserving all original functions without any additional setup.
Is Your Sierra Denali Showing These Symptoms?
- ✔ Erratic or non-functional power windows, door locks, or interior/exterior lighting.
- ✔ HVAC system failures, such as a blower motor that won’t turn on or stays stuck on high.
- ✔ An active airbag warning light, often accompanied by Diagnostic Trouble Code (DTC) B1001.
- ✔ Vehicle security system problems, including random alarm activation or no-start conditions.
- ✔ Unexplained battery drain or strange communication errors between modules (U-codes).
- ✔ Intermittent operation of windshield wipers or radio controls.
From the Diagnostic Bay
I remember a 2008 Sierra that came into the shop with a laundry list of complaints from the owner. The dome light would flicker, the driver’s window wouldn’t go down, and the truck would occasionally refuse to start. The owner had already replaced the battery and checked fuses. After hooking up the scanner, I saw a dozen communication codes. The root cause? A failing BCM. But more importantly, a corroded ground wire near the BCM’s mounting point was causing intermittent power loss, which likely damaged the original module over time. This is a crucial lesson: whenever you replace a 2007-2010 Sierra Denali BCM, always take an extra five minutes to clean and secure the main ground connections in that area. It’s the best way to prevent the same problem from happening to your new part.
A Straightforward Guide to Installation
Installing your cloned 2007-2010 Sierra Denali BCM is a job most DIYers can handle in under 15 minutes right in their driveway. Here’s a simple breakdown of the process:
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on any electronic components.
- Locate the BCM: On most GMT900 trucks like the Sierra, the BCM is located under the driver’s side of the 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 BCM. They have locking tabs, so be gentle. Once disconnected, unclip or unbolt the module from its bracket.
- Install the New Module: Seat the replacement BCM into the mounting bracket and securely plug in all the electrical connectors. You’ll hear a click as they lock into place.
- Post-Installation Checks: Reconnect the battery terminal. Start the vehicle and test all functions: lights, wipers, windows, locks, and HVAC. In most cases, everything will work perfectly. If an airbag light persists, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure to sync the systems.
Verified Vehicle Compatibility
This Body Control Module is a direct-fit replacement for a wide range of General Motors trucks and SUVs. It is compatible with part numbers 15878753, 25835966, 15263363, 15263497, and many others. Please verify your part number or contact us to ensure this is the correct component for your specific vehicle. Key compatible models include:
- ✔ 2007-2010 GMC Sierra Denali
- ✔ 2007-2013 Chevrolet Silverado & GMC Sierra (1500, 2500HD, 3500HD)
- ✔ 2007-2013 Chevrolet Tahoe, Suburban & GMC Yukon, Yukon XL
- ✔ 2007-2013 Cadillac Escalade, ESV, EXT
- ✔ 2007-2013 Chevrolet Avalanche
Frequently Asked Questions
Frequently Asked Questions
What is the cloning service and why do I need it?
Cloning is a process where we transfer all the essential data from your original BCM to the replacement unit. This includes your truck’s VIN and security information. This makes the replacement module plug-and-play, avoiding a costly and time-consuming trip to the dealership for programming.
Do I need to send my original BCM to you?
Yes, for the cloning service to work, you must ship your original module to us. We will perform the service and return both your original and the newly programmed replacement module to you.
Is there a core charge for this part?
No. Since we require your original module for the cloning service, there is no separate core charge. We always return your original part.
What if my airbag light is on after installation?
If the airbag light appears after installing the cloned BCM, it means the BCM and the airbag system (SDM) need to be electronically re-synced. This requires a professional scan tool to perform the ‘Setup SDM Primary Key in BCM’ procedure. This is a common step for these vehicles.
Will this fix a no-start problem?
A failing BCM can definitely cause a no-start or stalling condition by interfering with the vehicle’s anti-theft system. If your BCM is diagnosed as the fault, this part will resolve that issue.
How long does the cloning service take?
We typically complete the cloning service and ship your modules back out within one business day of receiving your original part, ensuring you get back on the road as quickly as possible.