Is your GM truck or van experiencing bizarre electrical issues? You’re not alone.
The Body Control Module, or BCM, is the central command center for your vehicle’s body electronics. It manages everything from your power windows and door locks to your interior lights and security system. When the BCM starts to fail, it can cause a frustrating array of problems that seem completely unrelated. This can make diagnosis a real challenge for even seasoned mechanics. Symptoms can appear intermittently at first, but they will inevitably worsen, potentially leaving you with a vehicle that won’t start.
This replacement Body Control Module is the definitive solution for restoring your vehicle’s electronic functions. We take the guesswork and hassle out of the repair by pre-programming the module to your vehicle’s exact VIN before it ships. This means you receive a part that is ready for installation right out of the box, saving you a trip to the dealership and avoiding their expensive programming fees. Simply provide your VIN after purchase, and we’ll handle the rest.
Diagnosing and Replacing Your Silverado Sierra BCM Module
A failing BCM can manifest in many ways. If you’re noticing several electronic components acting up simultaneously, the BCM is a primary suspect. This module is a direct-fit replacement for a wide range of GM trucks and vans, including the popular Silverado, Sierra, Express, and Savana models from 2003 to 2007. By replacing your faulty unit with our VIN-programmed module, you can confidently restore your vehicle’s functionality and peace of mind.
From the Diagnostic Bay
We had a 2005 Silverado 2500 come into the shop with the strangest combination of complaints. The dome light would flicker randomly, the radio would shut off on its own, and the ‘Service 4WD’ light was on, even though the four-wheel-drive system was mechanically sound. The owner had already replaced the battery and checked all the fuses. After connecting our diagnostic tool, we saw multiple communication errors pointing back to one source: a failing BCM. Once we installed a new, programmed BCM, all the ghost-like electrical issues vanished instantly. It’s a perfect example of how one faulty module can wreak havoc on multiple systems.
Common Symptoms of a Failing BCM
- ✔ Erratic or non-functional power windows and door locks.
- ✔ Interior or exterior lights flickering, staying on, or not turning on at all.
- ✔ The horn sounding randomly or not working when pressed.
- ✔ False warning lights on the instrument cluster, such as ‘Service 4WD’ or security alerts.
- ✔ Radio, climate control, or other accessory malfunctions.
- ✔ The anti-theft system preventing the vehicle from starting (Passlock issues).
- ✔ Wipers operating incorrectly or activating on their own.
Installation and Post-Install Considerations
Physically replacing the BCM is generally straightforward. On Silverado and Sierra pickups, it’s typically located under the driver’s side dashboard near the steering column. On Express and Savana vans, it’s often found in the center dash area. While our VIN programming makes this a near plug-and-play repair, some vehicles may require additional steps after installation. For example, if your airbag light is illuminated after the swap, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure to sync the airbag system. A brake pedal position sensor relearn may also be necessary on some models. There is no core charge for this part, so you can keep your old module.
This module is a direct replacement for the following part numbers: 15167329, 15194169, 15747545, 15136224, 15116065, 15198115, 15136876, 10367689.
Frequently Asked Questions
What is a BCM and what does it do?
The Body Control Module (BCM) is a computer in your vehicle that controls body-related electronic functions like power windows, door locks, interior lights, the security system, and more.
Do I need to program this BCM?
No! We program the module to your vehicle’s specific VIN before shipping. This makes the installation process much simpler and avoids a costly trip to the dealership.
Where is the BCM located on my truck or van?
On most 2003-2007 Silverado and Sierra pickups, the BCM is located under the steering column. On Savana and Express vans, it is typically found in the center of the dash.
My airbag light is on after installing the new BCM. Is it defective?
No, this is a common occurrence. The new BCM needs to be electronically introduced to the airbag system’s computer (SDM). This requires a ‘Setup SDM Primary Key in BCM’ procedure with a professional scan tool.
Will this fix my specific electrical problem?
A faulty BCM is a very common cause for the symptoms listed. While this module is a direct solution for a failed BCM, you should always perform proper diagnostics to confirm the BCM is the root cause of your issue.
What do you mean by ‘classic style’ for 2007 models?
In 2007, GM produced both the old body style (2003-2006) and the new body style. ‘Classic’ refers to the older style, identifiable by a creased door skin, which uses this BCM.