Is your GM truck or van plagued by frustrating electrical issues?
The Body Control Module, or BCM, is the central command center for your vehicle’s electronic accessories. It manages everything from your power windows and locks to the interior lights, security system, and instrument cluster warnings. When the BCM begins to fail, it can create a host of bizarre and seemingly unrelated problems, making diagnosis a real challenge. A faulty BCM can leave you with a vehicle that’s unreliable and annoying to operate.
From the Diagnostic Bay
We had a 2005 Silverado 2500 in the shop that was driving its owner crazy. The dome lights would flicker randomly, the radio would shut off, and the “Service Theft System” message would appear on the dash, sometimes preventing the truck from starting. After checking all the usual suspects like grounds and wiring, we traced the communication network errors back to a single point of failure: the original BCM. Replacing it with a VIN-programmed unit solved every single issue at once, restoring the truck’s functionality and the owner’s peace of mind.
Common Symptoms of a Failing BCM
- ✔ Erratic or non-functional interior and exterior lights.
- ✔ Power windows, door locks, or mirrors working intermittently or not at all.
- ✔ The security system engaging incorrectly or preventing the engine from starting.
- ✔ False warnings on the instrument cluster (e.g., “Service Airbag,” “Service 4WD”).
- ✔ Horn honking unexpectedly or not working when pressed.
- ✔ Communication loss with other vehicle modules, leading to various system failures.
Your Direct-Fit Sierra Silverado BCM Solution
This Body Control Module is the definitive solution for your 2003-2007 GM truck or van. It is a direct replacement for a wide range of models, including the popular Sierra and Silverado pickups. The biggest advantage of our service is that we program the module to your vehicle’s specific VIN before it ships. This critical step ensures the BCM communicates correctly with your truck’s existing components, saving you a costly trip to the dealership for programming. Simply provide your VIN after purchase, and we handle the rest, delivering a part that’s ready for installation.
Post-Installation Information
While this module is programmed for your vehicle, some GM platforms may require a simple relearn procedure after installation to ensure all systems are properly synchronized. These are not programming steps but rather electronic handshakes between modules. The most common are:
- Airbag System Sync: If the airbag warning light is on after installation, a professional scan tool is needed to perform the “Setup SDM Primary Key in BCM” procedure. This syncs the new BCM with the airbag module.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration might be necessary to ensure correct brake light and traction control operation.
This module is a direct replacement for the following part numbers: 15167329, 15194169, 15747545, 15136224, 15116065, 15198115, 15136876, 10367689.
Frequently Asked Questions
What does a Body Control Module (BCM) do?
The BCM acts as the brain for your vehicle’s body electronics. It controls non-engine related functions like lights, power windows, security systems, keyless entry, and instrument panel warnings.
Is this BCM truly plug-and-play?
Because we program it to your VIN before shipping, it is as close to plug-and-play as possible. It requires no further programming. However, as noted, some vehicles may require a simple relearn procedure for the airbag or brake systems, which can be done with a compatible high-end scan tool.
How do I provide my VIN for programming?
After you complete your purchase, you will receive instructions on how to send us your vehicle’s 17-digit VIN. We cannot ship your part until we receive this information.
What if my airbag light is on after I install the BCM?
This is a known possibility. It means the new BCM needs to be electronically synced with your vehicle’s existing airbag module (SDM). A repair shop with a professional-grade diagnostic tool will need to perform the ‘Setup SDM Primary Key in BCM’ procedure to resolve it.
Do I need to send my old BCM back?
No. This part is sold without a core charge, so you can keep your original module.