Tired of Chasing Electrical Gremlins in Your GM Truck?
If your 2003-2007 GMC Sierra Denali is suffering from a mind of its own—with flickering lights, a dead instrument cluster, erratic power locks, or an HVAC system that won’t cooperate—you’ve likely met the frustrating symptoms of a failing Body Control Module (BCM). As the central command for your truck’s body electronics, a faulty BCM can cause a cascade of confusing issues that are often misdiagnosed, leading to wasted time and money on unnecessary parts. This is the definitive solution.
We offer a professional Cloning Service for this BCM, part number 15064149. This isn’t just a part in a box; it’s a complete, hassle-free repair. You simply send us your original BCM. We then transfer its unique, vehicle-specific data (including key information and option configurations) to a fully tested replacement module. The result? You receive a true plug-and-play unit that requires no dealership programming. We even send your original module back to you. This service is the most reliable way to get your truck back to 100% functionality without the expensive trip to the dealer.
From the Diagnostic Bay: A Technician’s Notebook
I’ll never forget a 2006 Sierra Denali that came into my shop. The owner was at his wit’s end. He’d replaced the battery twice and the alternator once, but his truck would still intermittently refuse to start and the security light would flash randomly. His power windows had also stopped working. He was convinced the truck was cursed. After hooking up my scanner, I saw a handful of communication codes (U-codes) and a B1001 DTC. Instead of throwing more parts at it, we checked the BCM. Sure enough, a failing processor was causing the network to drop out. A cloned 2003-2007 Sierra Denali BCM had him back on the road in a day, with all issues resolved. It’s a classic failure I’ve seen hundreds of times on these GMT800 platforms.
Is Your Truck Showing These Telltale Signs?
A failing BCM can manifest in numerous ways. If you’re experiencing any of the following, this module is the likely solution:
- ✔ Intermittent or non-functional power windows, door locks, or mirrors.
- ✔ HVAC blower motor or climate controls not working correctly.
- ✔ The security system acting erratically, causing a no-start condition.
- ✔ Headlights, taillights, or interior lights staying on or not turning on at all.
- ✔ The dreaded airbag warning light, often accompanied by DTC B1001 (Option Configuration Error).
- ✔ A battery that drains overnight for no apparent reason.
- ✔ Communication errors with other modules on the vehicle’s data network.
Your Straightforward 5-Minute Installation Guide
Installing your cloned BCM is a simple job that most DIYers can complete with basic hand tools. No complex wiring or programming is needed.
- Step 1: Safety First. Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work. This prevents short circuits and helps reset the vehicle’s systems.
- Step 2: Locate the BCM. On most 2003-2007 Sierra Denali and similar GM trucks/SUVs, 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.
- Step 3: Swap the Module. The BCM is held in place by retaining clips or a few small bolts. Carefully disconnect the electrical connectors (they have locking tabs, so don’t force them) and remove the old module. Install the cloned BCM in its place and securely reconnect all connectors.
- Step 4: Reconnect and Test. Reconnect the negative battery terminal. Start the vehicle and test all functions: lights, windows, locks, wipers, and HVAC to confirm the repair was successful.
Important Post-Installation Notes
In some cases, additional steps may be required. If your airbag light remains on, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure. Similarly, a ‘Brake Pedal Position Relearn’ might be necessary on certain models. Always refer to a service manual for vehicle-specific instructions.
Verified Vehicle Compatibility
This cloning service is for BCMs with part number 15064149 and other interchangeable numbers (like 15116066, 15136225, 15198116, etc.) found in a wide range of GM vehicles. It is a direct fit for the following models:
- GMC Sierra Denali: 2003, 2004, 2005, 2006, 2007 (Classic)
- GMC Sierra 1500/2500/3500: 2003-2007 (Classic)
- GMC Yukon / Yukon XL: 2003-2006
- Chevrolet Silverado 1500/2500/3500: 2003-2007 (Classic)
- Chevrolet Avalanche 1500/2500: 2003-2006
- Chevrolet Suburban / Tahoe: 2003-2006
- Cadillac Escalade / ESV / EXT: 2003-2006
- Hummer H2: 2003-2007
- Chevrolet Express / GMC Savana Van: 2004-2007 (w/ commercial package)
Frequently Asked Questions
What exactly is a ‘Cloning Service’?
Cloning is a data transfer process. You send us your original, faulty BCM. We use specialized equipment to read the essential VIN, security, and options data from it and write that exact data onto a replacement module. This makes the new module an identical twin to your old one, allowing it to work in your truck without any further programming.
Will I need a dealership to program this BCM after I install it?
Absolutely not. The primary benefit of our cloning service is to eliminate the need for dealer programming. Because we transfer all the necessary data from your original part, the replacement BCM is ready for immediate, plug-and-play installation.
Where is the BCM located on my 2005 Sierra Denali?
The Body Control Module on the 2003-2007 Sierra Denali is typically found under the driver’s side dashboard, mounted near the steering column. You will likely need to remove the plastic knee bolster panel to see and access it.
What if my airbag light is on after installation?
If the airbag light appears after you install the cloned BCM, it means the BCM and the SDM (Sensing and Diagnostic Module) need to be electronically re-synced. This requires a ‘Setup SDM Primary Key in BCM’ procedure, which must be performed with a bi-directional professional scan tool.
Do I need to send my old part back for a core charge?
There is no core charge. Our service requires your original module to perform the data cloning. We always return your original module along with the newly programmed replacement unit.