Tired of Chasing Electrical Gremlins in Your GM Truck?
If your 2003-2007 GMC Sierra 1500 is acting possessed—with flickering lights, a dead instrument cluster, or a temperamental HVAC system—you’re not alone. These frustrating and often intermittent issues typically point to one culprit: a failing Body Control Module (BCM). The BCM is the central command center for your truck’s body electronics. When it fails, it can create a cascade of problems that are difficult to diagnose. This module, part number 15137395, is the definitive solution to restore order and reliability to your vehicle.
We make this repair simple with our professional Cloning Service. Just send us your original BCM, and we’ll transfer all the critical vehicle-specific data—including VIN, mileage, and key information—to this replacement unit. The result is a truly plug-and-play module that requires no expensive trip to the dealership for programming. It arrives at your door ready for immediate installation, saving you time, money, and headaches.
Case Study: A Tricky Diagnosis
A customer brought in a 2005 Sierra 1500 with a classic ghost problem. The radio would cut out, the power locks would randomly cycle, and occasionally, the truck wouldn’t start, showing only a security light. They had already replaced the battery and checked the main grounds. After hooking up my scanner, I saw a handful of U-codes (communication errors) and a B1001 code. In my 20+ years of experience, this pattern almost always points to an internal BCM failure. We installed one of our cloned BCMs, and in less than 10 minutes, every single issue was resolved. The customer was thrilled to have their reliable truck back without a massive dealership bill.
Is Your Truck Showing These Symptoms?
- ✔️ The security or anti-theft system prevents the engine from starting.
- ✔️ Power windows, door locks, or interior lights work intermittently or not at all.
- ✔️ The HVAC blower motor is erratic, or the climate controls are unresponsive.
- ✔️ Your scan tool shows communication errors or a specific BCM-related Diagnostic Trouble Code (DTC) like B1001.
- ✔️ The airbag warning light is illuminated on the dash.
- ✔️ Wipers or exterior lights behave unpredictably.
A Straightforward Guide to Installation
- ✔ Safety First: Disconnect the negative terminal from your truck’s battery to prevent any electrical shorts and to help reset the system.
- ✔ Locate the BCM: On most Sierra and Silverado 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 electrical connectors.
- ✔ Swap the Modules: Carefully unplug the wiring harnesses from your old BCM. They have locking tabs that need to be depressed. Remove any mounting screws or clips holding the old module in place, then install your new, pre-cloned module in its place.
- ✔ Reconnect and Test: Securely plug all wiring harnesses into the new BCM. Reconnect the battery terminal. Start the vehicle and test all body functions—lights, locks, windows, radio, and HVAC—to confirm the repair was successful.
Post-Installation Note: In some cases, specific relearn procedures may be needed. If your airbag light remains on, a professional scan tool is required to perform the “Setup SDM Primary Key in BCM” procedure. A Brake Pedal Position Relearn might also be necessary. Always refer to a factory service manual for vehicle-specific instructions.
Verified Vehicle Compatibility
This BCM is a direct-fit replacement for a wide range of General Motors trucks, vans, and SUVs. It is interchangeable with part numbers 15116066, 15137395, 15198116, and others. While this part is for the 2003-2007 Sierra 1500 Pickup, it also fits models like the Chevrolet Silverado, Tahoe, Suburban, Avalanche, Express, and their GMC/Cadillac counterparts. Please verify your part number or contact us to ensure perfect fitment for your vehicle.
Frequently Asked Questions
What is the cloning service and how does it work?
Our cloning service is a process where we transfer the exact software and vehicle-specific data from your original BCM to the replacement unit. This makes the new module a perfect electronic match for your truck, eliminating the need for dealership programming. You simply mail us your old module, and we return it along with your ready-to-install replacement.
Do I need any special tools for installation?
For the physical swap, you’ll only need basic hand tools like a socket set or screwdriver. However, if the airbag light stays on after installation, a high-end diagnostic scan tool is required to perform the SDM key relearn procedure. Most DIY installations do not require this.
Is there a core charge for this part?
No, there is no core charge. We require your original module to perform the cloning service, and we always return your original part to you along with the newly programmed one. You are not charged an extra fee.
Will this fix my no-start problem?
If your no-start issue is caused by the vehicle’s anti-theft or security system being triggered by a faulty BCM, then yes, this part will resolve it. The cloning process ensures the security handshake between the BCM and other modules remains intact.
What if I install it and still have problems?
Our modules are rigorously tested and come with a one-year warranty. If you encounter issues, first verify all connections are secure. Then, check if a post-install procedure like an airbag or brake sensor relearn is needed. Our expert support team is also available to help you diagnose the situation.