Are you battling frustrating electrical gremlins in your truck? Flickering lights, malfunctioning power windows, a dead HVAC system, or a security system that won’t cooperate are all classic signs of a failing Body Control Module (BCM). The BCM is the central command center for your vehicle’s body electronics, and when it fails, it can cause a wide range of perplexing issues. This VIN-programmed BCM, part number 15137394, is the definitive solution to restore full functionality and reliability to your 2003-2007 GMC Sierra 3500 and other compatible GM vehicles.
From the Diagnostic Bay
We had a 2006 Sierra 3500 roll into the shop that was a real head-scratcher. The owner reported the radio would turn on by itself, the dome lights wouldn’t work, and occasionally the truck would refuse to start, showing a security light on the dash. A scan showed a dozen communication codes, all pointing to a network issue. After checking the main grounds and power feeds, we focused on the BCM. Swapping in a pre-programmed module like this one cleared every single code and resolved all the bizarre symptoms in under 10 minutes. It’s often the single point of failure for these widespread electrical problems.
Common Symptoms of a Failing BCM
- ✔ Unresponsive or erratic power door locks and windows.
- ✔ Interior or exterior lights that stay on, flicker, or don’t work at all.
- ✔ HVAC and climate control systems failing to operate correctly.
- ✔ An illuminated airbag warning light, often with a B1001 diagnostic trouble code.
- ✔ Vehicle security system malfunctions, leading to no-start or intermittent starting conditions.
- ✔ Inconsistent windshield wiper operation.
Why Choose Our Sierra 3500 Body Control Module?
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We handle the complex programming so you don’t have to. Each module is flashed with the latest GM software updates and programmed directly to your truck’s Vehicle Identification Number (VIN) before shipping. This ensures perfect communication between modules and eliminates the need for expensive dealership visits for programming. Built to strict OEM specifications, this module guarantees a precise fit and dependable performance, backed by our one-year warranty.
Installation & Post-Install Notes:
Installation is a simple plug-and-play process. The BCM is typically located under the driver’s side dashboard, near the steering column. Always disconnect the battery before swapping the module. In some cases, particularly if your airbag light was on, a post-installation procedure called ‘Setup SDM Primary Key in BCM’ may be required using a professional scan tool to sync the airbag system. Similarly, a brake pedal position relearn might be needed. These are straightforward procedures for any qualified technician.
Frequently Asked Questions
Do I need to program this BCM?
No. This Body Control Module comes fully programmed to your vehicle’s VIN. It’s ready for plug-and-play installation right out of the box, saving you a trip to the dealership.
Where is the BCM located on a 2005 GMC Sierra 3500?
On the 2003-2007 GMC Sierra 3500, the BCM is typically found under the driver’s side of the dashboard, attached to a bracket near the steering column.
Will this part fix my airbag light?
A faulty BCM can cause the airbag light to illuminate. Replacing it often solves the issue, but you may need a technician with a high-level scan tool to perform an ‘SDM Key Relearn’ to sync the new BCM with the airbag system and clear the light.
Is there a core charge for my old part?
No, there is no core charge. You can keep your old module without any hassle or extra fees.
What other part numbers is this compatible with?
This module is a direct replacement for several part numbers, including 15116066, 10383536, 15136225, 15137393, 15198116, and more.