Restore Full Functionality to Your GMC Truck
Are you chasing down bizarre electrical issues in your truck? Flickering lights, a possessed radio, a security system that won’t let you start the engine, or power windows with a mind of their own are all classic signs of a failing Body Control Module (BCM). As the central command for your vehicle’s body electronics, a faulty BCM can make your reliable Sierra Denali feel unpredictable. This replacement module, part number 15137393, is the definitive solution to restore order and get your truck’s features working seamlessly again.
A Technician’s Notebook: The Intermittent Gremlin
I’ve had countless 2003-2007 GM trucks roll into my bay with symptoms that drove their owners crazy. A recent case was a 2006 Sierra Denali where the HVAC blower would only work on high, the driver’s side power lock was dead, and occasionally, it just wouldn’t start. The owner had already replaced the battery and checked fuses. After connecting my scanner, I saw a handful of communication loss codes (U-codes) pointing to the BCM. Instead of a costly and time-consuming trip to the dealer for a new module and programming, we used a cloning service. The customer sent in their old BCM, we transferred the data to this replacement unit, and the install was a simple plug-in. All the phantom issues were gone instantly. This is the most efficient repair for these common failures.
Our professional Cloning Service makes this repair simple. You send us your original BCM, and we expertly transfer all the critical vehicle-specific data—including VIN, mileage, and key information—to this replacement unit. We then ship both your original module and the ready-to-install replacement back to you. This process ensures 100% compatibility and avoids any need for expensive dealership programming, making it a true plug-and-play fix for your 2003-2007 Sierra Denali BCM.
Is Your Sierra Denali Showing These Electrical Gremlins?
- ✔ The HVAC system is unresponsive, or the blower motor operates intermittently.
- ✔ Your airbag warning light is illuminated, often with a DTC like B1001 (Option Configuration Error).
- ✔ Power features like windows, door locks, or interior/exterior lights fail to work or act erratically.
- ✔ The factory security system malfunctions, causing no-start or crank-no-start conditions.
- ✔ A scan tool reveals multiple communication or body-related Diagnostic Trouble Codes (DTCs).
- ✔ Unexplained battery drain when the vehicle is off.
Your Straightforward 5-Minute Installation Guide
- ✔ Step 1: Safety FirstAlways disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- ✔ Step 2: Locate the BCMOn most Sierra Denali models, the BCM is located under the driver’s side of the dashboard, near the steering column. It’s a black plastic box with several large multi-pin connectors.
- ✔ Step 3: Swap the ModuleCarefully release the locking tabs on the electrical connectors and unplug them from the old BCM. Remove any mounting screws or clips holding the module in place. Position the new cloned BCM and plug in the connectors until they click securely into place.
- ✔ Step 4: Reconnect and TestReconnect the negative battery terminal. Start your vehicle and test all body functions—lights, locks, windows, wipers, and HVAC—to confirm the repair was successful.
- ✔ Step 5: Post-Installation ChecksIn some cases, a post-install procedure like an Airbag System Sync or Brake Pedal Position Relearn may be needed if related warning lights appear. This typically requires a professional scan tool. See our FAQ for more details.
By choosing our cloning service for your 2003-2007 Sierra Denali BCM, you are getting a reliable, cost-effective solution that puts you back in control of your vehicle’s electronics without the dealership hassle.
Verified Vehicle Compatibility
AVALANCHE 1500 03-06 Body Control (BCM); (under steering column)
AVALANCHE 2500 02-06 Body Control (BCM); (under steering column)
ESCALADE & ESV & EXT 03-06 Body Control (BCM); (under steering column)
HUMMER H2 04-07 Body Control (BCM); (LH dash)
HUMMER H2 03 Body Control (BCM); ID 8116
SIERRA DENALI 03-06 Body Control (BCM); (under steering column)
SIERRA DENALI 07 Body Control (BCM); classic style (creased door skin), (under steering column)
SIERRA 1500/2500/3500 PICKUP 03-07 (classic style) Body Control (BCM); (under steering column), Crew Cab
SILVERADO 1500/2500/3500 PICKUP 03-07 (classic style) Body Control (BCM); (under steering column), Crew Cab
SUBURBAN 1500/2500 03-06 Body Control (BCM); (under steering column)
TAHOE 03-06 Body Control (BCM); (under steering column)
YUKON & YUKON XL 1500/2500 03-06 Body Control (BCM); (under steering column)
EXPRESS & SAVANA VANS 04-07 Body Control (BCM); (center dash), w/commercial tradesman package (opt PRP)
Note: This module is interchangeable with part numbers 10383536, 15116066, 15136225, 15136877, 15137394, 15198116, and others. Please verify your part number or contact us for fitment confirmation.
Frequently Asked Questions
What is a BCM cloning service and how does it work?
Our cloning service is a simple process where we transfer the exact configuration data from your original, faulty BCM to this replacement unit. This makes the new module a perfect electronic match for your truck, eliminating the need for dealership programming. You just send us your old module, we perform the service, and ship both units back to you.
Do I need to take my truck to a dealer after installation?
No! The primary benefit of our cloning service is that it completely bypasses the need for dealer intervention. The module arrives ready for plug-and-play installation, saving you hundreds of dollars in programming fees.
What tools are needed to install this BCM?
Installation is very straightforward for a DIYer. You’ll typically only need basic hand tools, such as a socket wrench or screwdriver, to access the module under the dashboard. No special electronic tools are required for the physical swap.
My airbag light is on. Will this fix it?
If the airbag light is caused by a faulty BCM (like DTC B1001), this will resolve the root cause. However, after installation, the airbag system (SDM) may need to be synced with the new BCM using a professional scan tool. This is a quick ‘Setup SDM Primary Key in BCM’ procedure a mechanic can perform.
Do I need to send my old part back for a core charge?
There is no core charge. However, you must send us your original module so we can perform the cloning service. We will return your original module to you along with the newly programmed replacement.