Restore Full Control to Your Sierra Denali
Are you battling frustrating electrical issues in your 2003-2007 GMC Sierra Denali? A failing Body Control Module (BCM) is often the culprit behind a wide range of problems, from malfunctioning lights and power accessories to no-start conditions. This replacement BCM, equivalent to part number 15136225, is the definitive solution to get your truck’s sophisticated electronics working in perfect harmony again. As the central command for your vehicle’s body functions, a healthy BCM is critical for safety, comfort, and reliability.
We make the repair process seamless with our expert Cloning Service. Simply send us your original BCM, and we will transfer all the essential vehicle-specific data—including VIN, mileage, and key information—to this replacement unit. The result is a true plug-and-play module that requires no expensive trip to the dealership for programming. This service ensures that all your truck’s original features and security settings are preserved, getting you back on the road with confidence and less downtime.
A Technician’s Notebook: The Ghost in the Machine
I once had a 2006 Sierra Denali in my bay that was driving its owner crazy. The symptoms were all over the place: the radio would randomly change stations, the driver’s side window would work one day and not the next, and occasionally the security light would flash, preventing it from starting. The owner had already replaced the battery and checked all the fuses. After connecting my scanner, I saw a handful of communication error codes (U-codes) and a B1001. This pointed directly to the BCM. These modules can fail internally, causing erratic signals that create these ‘ghost’ problems. After installing a cloned BCM, every single issue vanished. It’s a great reminder that when multiple, unrelated electrical systems act up, the BCM should be your primary suspect.
Diagnosing a Faulty 2003-2007 Sierra Denali BCM
A failing BCM can manifest in ways that might seem unrelated at first. If your truck is experiencing a combination of these issues, it’s highly likely the BCM is at fault. This module is the nerve center for your vehicle’s comfort and convenience features, and its failure can disrupt daily operation. Replacing it is key to restoring the premium feel and function of your Sierra Denali.
Is Your Sierra Denali Showing These Electrical Gremlins?
- ✔ Unresponsive or erratic power windows, door locks, or mirrors.
- ✔ Interior or exterior lights that won’t turn on or off, or flicker intermittently.
- ✔ HVAC and climate control systems not working correctly (e.g., blower motor issues).
- ✔ The security system acting up, leading to a no-start condition or false alarms.
- ✔ An airbag warning light on the dash, sometimes accompanied by DTC B1001.
- ✔ Inconsistent windshield wiper operation.
- ✔ Communication errors with other modules on the vehicle network.
A Straightforward Guide to BCM Installation
- ✔ Safety First: Before you begin, disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and to help reset the system.
- ✔ Locate the BCM: On most 2003-2007 Sierra Denali models, the BCM is located under the driver’s side of the dashboard, near the steering column.
- ✔ Remove the Old Module: Carefully disconnect the electrical connectors attached to the BCM. They have locking tabs that need to be pressed. Once disconnected, unbolt or unclip the module from its mounting bracket.
- ✔ Install the New Module: Seat the cloned BCM into the mounting bracket and securely reattach all the electrical connectors. You should hear a click as they lock into place.
- ✔ Reconnect and Test: Reconnect the battery terminal. Start the vehicle and test all the functions controlled by the BCM—lights, locks, windows, wipers, and HVAC—to confirm the repair was successful.
- ✔ Post-Installation Checks: In some cases, an airbag light may persist. This requires a professional scan tool to perform the ‘Setup SDM Primary Key in BCM’ procedure. A brake pedal position relearn may also be needed.
Verified Fitment for Your GM Truck or SUV
This Body Control Module is a direct-fit replacement for a wide range of General Motors vehicles. While this page focuses on the 2003-2007 Sierra Denali BCM, it is also compatible with the following models and part numbers. Always verify your part number before ordering.
Interchangeable Part Numbers: 15136225, 10383536, 15116066, 15136877, 15137393, 15137394, 15137395, 15137396, 15198116, 15257043, 15257044, 15257045, 15257046, 10367690, 15064149, 15194170
Compatible Models Include:
- Chevrolet Avalanche, Silverado, Suburban, Tahoe, Express Van (2002-2007)
- GMC Sierra, Yukon, Yukon XL, Savana Van (2002-2007)
- Cadillac Escalade, ESV, EXT (2003-2006)
- Hummer H2 (2003-2007)
Frequently Asked Questions
How does the Cloning Service work?
You send us your original BCM. We use specialized equipment to read the vehicle-specific programming and transfer it directly to your replacement module. This makes the new part a perfect electronic match for your truck, eliminating the need for dealership programming.
Do I get my old BCM back?
Yes, absolutely. The customer’s original module is always returned along with the programmed replacement unit. We do not keep the core, and there is no core charge.
What if my airbag light is on after installation?
This is a known possibility. It means the new BCM needs to be electronically ‘introduced’ to the airbag system’s Sensing and Diagnostic Module (SDM). A mechanic with a high-level scan tool will need to perform the ‘Setup SDM Primary Key in BCM’ procedure to sync the modules and clear the light.
Is this a difficult part for a DIYer to install?
Not at all. The physical replacement is very simple, typically taking less than 15 minutes with basic hand tools. It’s located under the dash and just involves swapping connectors and a mounting bolt or two. The cloning service handles the difficult software side of the job for you.
Why choose a cloned module over a new one from the dealer?
Our cloning service provides a cost-effective and convenient solution. You get a reliable part that is ready to install right out of the box, saving you from the high costs and scheduling hassles of dealership service for programming a new module.