Is Your GM Truck or Van Plagued with Electrical Gremlins?
Are you dealing with flickering lights, power windows and locks that have a mind of their own, or a security system that won’t behave? These frustrating and often intermittent issues frequently point to a failing Body Control Module (BCM). The BCM is the central nervous system for your vehicle’s body electronics, managing everything from interior lighting and power accessories to the anti-theft system. When it fails, it can cause a cascade of confusing problems.
From the Diagnostic Bay
We had a 2005 Silverado 2500 in the shop that was draining its battery every two days. The owner had already replaced the battery and alternator. After a thorough parasitic draw test, we traced the issue to the BCM. It wasn’t fully going to ‘sleep’ after the truck was turned off, causing a small but constant power drain that killed the battery. Replacing the BCM with a VIN-programmed unit solved the problem completely, saving the customer from further headaches and the cost of another new battery.
Common Symptoms of a Failing BCM:
- ✔ Erratic or non-functional power windows, door locks, or mirrors.
- ✔ Interior or exterior lights staying on, flickering, or not working at all.
- ✔ The security system acting up or preventing the vehicle from starting.
- ✔ Unexplained parasitic battery drain.
- ✔ Horn honking randomly or not working when pressed.
- ✔ Inaccurate or dead gauges on the instrument cluster.
A Simple, Programmed Solution for Your GM Body Control Module
Don’t let a faulty BCM keep your truck or van off the road. This is a direct-fit replacement for a wide range of 2003-2007 GM vehicles, including the Silverado, Sierra, Express, and Savana. The best part? We handle the programming for you. Simply provide your vehicle’s VIN during checkout, and we will flash the module with the latest GM software specific to your vehicle. This eliminates the need for an expensive trip to the dealership for programming, making the installation process much simpler. Plus, there’s no core charge, so you can keep your old part.
Post-Installation Procedures
While this module is programmed for your VIN, some vehicles may require simple relearn procedures after installation to ensure all systems communicate correctly. These can include:
- Airbag System Sync: If the airbag light is on after installation, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure to sync the modules.
- Brake Pedal Position Relearn: Some models may require a brake pedal position sensor recalibration to ensure proper brake light and traction control operation.
Always consult a factory service manual or a qualified technician for guidance specific to your vehicle.
This BCM is a compatible 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 is a computer that controls and monitors many of your vehicle’s non-engine related functions, such as power windows, locks, lights, wipers, security system, and horn.
Why do you need my VIN?
Your Vehicle Identification Number (VIN) allows us to program the BCM with the exact software and settings for your vehicle’s specific options and features. This ensures proper functionality and a much easier installation process.
Is this part difficult to install?
Physically replacing the BCM is typically straightforward. It’s usually located under the steering column or in the center dash. Since we pre-program the unit, you avoid the most complex part of the job. However, some vehicles may require post-installation relearn procedures as noted.
Will this fix my ‘Service Vehicle Soon’ light?
A faulty BCM is a common cause of this warning light. While replacing the BCM will likely resolve the issue if it’s the root cause, it’s always best to have the vehicle scanned for diagnostic trouble codes (DTCs) to confirm the diagnosis.
What happens if the airbag light comes on after I install this?
This indicates the new BCM needs to be electronically ‘introduced’ to the airbag system’s computer (SDM). A professional-grade scan tool is required to perform the ‘Setup SDM Primary Key in BCM’ procedure to sync the two modules and turn off the light.