Fix Your Truck’s Electrical Headaches for Good
Is your GMC Sierra or another GM truck acting possessed? Flickering lights, a dead instrument cluster, or a security system that won’t let you start the engine are classic signs of a failing Body Control Module (BCM). As the central hub for your vehicle’s body electronics, a faulty BCM can cause a cascade of frustrating and unpredictable problems. This replacement module, part number 15137395, is the definitive solution for your 2003-2007 Sierra 2500 Body Control Module needs, offered with our expert cloning service to make your repair simple and effective.
We take the guesswork out of the repair. Instead of paying for expensive dealership programming, you simply send us your original BCM. We transfer all the critical data—including your vehicle’s specific VIN and security information—to this quality replacement unit. When you receive it back, it’s a true plug-and-play part, ready to restore full functionality without any extra steps. It’s the most efficient way to get your truck back to 100%.
From the Diagnostic Bay: The Case of the Spooky Silverado
A few months back, a 2005 Silverado 2500 was towed into my shop with a familiar story: intermittent no-start, dash lights flickering randomly, and the radio cutting out. The owner had already replaced the battery and checked the alternator. After hooking up my scanner, I saw a dozen communication codes (U-codes) and a B1001 for the BCM. From experience, I know these GMT800 platform trucks often suffer from failing BCMs, sometimes due to internal board corrosion or a bad ground. We confirmed the main power and grounds to the module were solid, pointing directly to an internal BCM failure. With our cloning service, we had him back on the road the next day with a new module, all symptoms gone. It’s a repair I’ve done hundreds of times, and this is the most reliable fix.
Common Signs Your BCM is Failing
- ✔️ Your power windows, door locks, or interior/exterior lights work intermittently or not at all.
- ✔️ The HVAC blower motor is erratic, or the climate controls are unresponsive.
- ✔️ The security light is flashing, and the engine won’t crank (PassLock issues).
- ✔️ You see an airbag warning light on the dash, sometimes with a DTC like B1001.
- ✔️ The instrument panel or radio randomly shuts off while driving.
- ✔️ The windshield wipers behave erratically or won’t turn off.
A Straightforward Guide to Installation
- ✔ Safety First: Begin by disconnecting the negative terminal from your vehicle’s battery to prevent any electrical shorts and to help reset the system.
- ✔ Locate the BCM: On most GM trucks and SUVs like the Sierra, the BCM is located under the driver’s side dashboard, just to the left of the steering column. In Express/Savana vans, it is typically behind the center dash panel.
- ✔ Remove the Old Module: Carefully unplug the electrical connectors. They have locking tabs that need to be depressed. Once unplugged, the module can be unclipped or unbolted from its mounting bracket.
- ✔ Install the New Module: Seat the replacement BCM into the mounting bracket and firmly reconnect all electrical connectors until they click into place.
- ✔ Reconnect and Test: Reconnect the negative battery terminal. Start the vehicle and test all functions controlled by the BCM—lights, locks, windows, wipers, and HVAC—to confirm the repair was successful.
Important Post-Installation Note: In some cases, an airbag light may remain on. This requires a professional scan tool to perform the “Setup SDM Primary Key in BCM” procedure. A Brake Pedal Position Relearn might also be needed on certain models. These are simple procedures for any qualified shop.
Guaranteed Fitment for Your GM Vehicle
This 2003-2007 Sierra 2500 Body Control Module is a direct replacement for part number 15137395 and is interchangeable with a wide range of other part numbers, including 15116066, 15137394, and 15198116. It fits a broad selection of GM trucks, vans, and SUVs, including:
- ✔️ 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)
Always verify your part number or consult our fitment list to ensure perfect compatibility.
Frequently Asked Questions
How does the cloning service work?
You purchase the module and then ship your original BCM to us. We professionally transfer the vehicle-specific programming and security data from your old unit to the replacement unit. We then ship both modules back to you, ensuring the replacement is 100% plug-and-play.
Do I need to get this programmed at the dealership?
No. Our cloning service completely eliminates the need for any additional programming. This saves you time and the high costs associated with dealer service.
What is your core policy?
There is no core charge. We require your original module for the data transfer service, and your original module is always returned to you along with the programmed replacement unit. We do not keep it.
What happens if my airbag light is on after installation?
If the airbag light appears, it means the BCM and the Sensing and Diagnostic Module (SDM) need to be synced. A mechanic with a professional-grade scan tool can perform the “Setup SDM PrimaryKey in BCM” function in a few minutes to resolve this.
Is this part difficult 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 in an accessible spot under the dashboard on most models. Our cloning service handles the complicated programming part for you.