End the Electrical Headaches in Your GM Truck
Are you chasing down bizarre electrical issues in your truck? One minute the power windows work, the next they don’t. The A/C blower motor has a mind of its own, and you’re getting strange warning lights on the dash. These aren’t separate problems; they’re classic signs of a failing Body Control Module (BCM). As the central command center for your truck’s body electronics, a faulty BCM can cause widespread, frustrating failures. This VIN-programmed Body Control Module, compatible with part number 15137394, is the direct-fit, reliable solution to restore full functionality to your vehicle without a costly trip to the dealership.
A Technician’s Notebook
I recently had a 2006 Silverado 2500 in the shop where the owner had already replaced the blower motor and resistor, but his HVAC controls were still dead. He was convinced it was a wiring issue. After a quick scan, I saw a B1001 DTC and communication loss codes from the BCM. Instead of hours chasing wires, we installed a VIN-programmed BCM. In less than 10 minutes, the HVAC system, power locks, and interior lights were all working perfectly. It’s a common scenario; the BCM is often the root cause of what seems like multiple unrelated electrical failures.
Is Your Truck Showing These Symptoms?
A failing BCM can manifest in numerous ways. If you’re experiencing any of the following, it’s a strong indicator that your module needs replacement:
- ✔ Intermittent or non-functional power windows, door locks, or mirrors.
- ✔ HVAC system problems, such as a blower motor that won’t turn on or can’t be controlled.
- ✔ Erratic interior or exterior lights (e.g., dome lights staying on, headlights flickering).
- ✔ An active security system light or a no-start condition due to the anti-theft system.
- ✔ An airbag warning light on the dash, often accompanied by diagnostic trouble codes like B1001.
- ✔ Unexplained battery drain or grounding issues that seem to appear out of nowhere.
A Straightforward Guide to Installation
One of the best features of this module is its simple, plug-and-play installation. No complex wiring or special tools are needed. For the skilled DIYer or professional mechanic, this is a quick job that gets your truck back to 100%.
- Step 1: Safety First. Always disconnect the negative terminal from your truck’s battery before starting any electrical work. This prevents short circuits and helps reset the vehicle’s electronic systems.
- Step 2: Locate the BCM. On most Silverado, Sierra, and other GM trucks/SUVs, the BCM is located under the driver’s side dashboard, near the steering column. On Express and Savana vans, it’s typically behind the center dash panel.
- Step 3: Swap the Module. Carefully disconnect the electrical connectors from the old BCM. They have locking tabs, so be gentle. Remove the old module from its mounting bracket and install the new one in its place.
- Step 4: Reconnect and Test. Securely plug the connectors into your new BCM. Reconnect the battery terminal. Start the vehicle and test all body functions—windows, locks, lights, wipers, and HVAC—to confirm the repair.
Why Choose a VIN-Programmed BCM?
This isn’t just a replacement part; it’s a complete solution. We program the module to your vehicle’s specific Vehicle Identification Number (VIN) before it ships. This crucial step ensures the module communicates seamlessly with your truck’s other electronic systems, like the Engine Control Module (ECM) and Supplemental Restraint System (SRS). You get OEM-level performance without paying for dealership programming. This is the most effective way to solve issues related to a faulty 2003-2007 Silverado 3500 BCM and get a first-time fix.
Guaranteed Fitment for Your GM Vehicle
This module is a direct replacement for a wide range of GM trucks, vans, and SUVs, and interchanges with part numbers 15116066, 15137394, 15198116, and others. It is engineered to fit the following models (Crew Cab where specified):
GMC: Sierra 1500/2500/3500/Denali (2003-2007 Classic), Yukon/Yukon XL 1500/2500 (2003-2006), Savana Van 1500/2500/3500 (2004-2007 w/ PRP option).
Cadillac: Escalade, ESV, EXT (2003-2006).
Hummer: H2 (2003-2007).
Note: Fitment for 2007 models applies to the ‘Classic’ body style with the creased door skin.
Frequently Asked Questions
Do I need to have this BCM programmed by a dealer?
No. We pre-program the module to your vehicle’s VIN before shipping. It arrives ready for plug-and-play installation, saving you time and money.
What if my airbag light is on after installation?
In some cases, the new BCM needs to be synced with the airbag system. This requires a ‘Setup SDM Primary Key in BCM’ procedure using a professional scan tool. This is only necessary if the airbag light appears after the swap.
Is there a core charge for my old part?
No, there is no core charge. You can keep your old module without the hassle of returning it.
Will this fix my intermittent no-start problem?
Yes, a failing BCM is a very common cause of no-start conditions related to the vehicle’s anti-theft or security system. Replacing it often resolves these issues.
What other procedures might be needed after installing the 2003-2007 Silverado 3500 BCM?
Depending on your specific model, a Brake Pedal Position (BPP) sensor relearn might be necessary to ensure proper brake light and traction control operation. Always consult a service manual for vehicle-specific requirements.