Are you dealing with frustrating and unpredictable electrical problems in your GM vehicle? Issues like power windows that won’t go up, door locks with a mind of their own, or dashboard lights that flicker randomly are often signs of a failing Body Control Module (BCM). The BCM acts as the central nervous system for your vehicle’s body electronics, and when it malfunctions, it can cause a wide range of confusing symptoms. This replacement GM Body Control Module is the definitive solution to restore your vehicle’s proper function and your peace of mind.
This isn’t just a part in a box. We provide a crucial service by programming the module to your vehicle’s specific Vehicle Identification Number (VIN) before it ships. This ensures that the BCM communicates correctly with your vehicle’s other computers right out of the box, saving you a costly and time-consuming trip to the dealership for programming. Simply provide us with your VIN after purchase, and we’ll handle the rest, loading the latest software updates from GM for optimal performance and reliability.
Diagnosing and Replacing Your GM Body Control Module
The BCM is responsible for a vast array of functions you use every day. A failure can manifest in one or multiple systems simultaneously. If you’re experiencing any of the issues below, a faulty BCM is the likely culprit. Replacing it with our pre-programmed unit is the most direct path to a lasting repair.
Common Symptoms of a Failing BCM
- ✔ Erratic or non-functional power windows, door locks, or mirrors.
- ✔ Interior dome lights or exterior parking lights staying on or not turning on at all.
- ✔ The security system engaging randomly, causing the horn to honk or preventing the engine from starting.
- ✔ Instrument cluster gauges behaving erratically or warning lights appearing for no reason.
- ✔ Remote keyless entry (fob) not working.
- ✔ Wipers activating on their own or not working when commanded.
After installation, some vehicles may require simple relearn procedures to sync related systems. For example, if your airbag light is illuminated, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ function. Similarly, a ‘Brake Pedal Position Relearn’ might be necessary for correct brake light and traction control operation. These procedures are straightforward for any qualified technician.
Frequently Asked Questions
What exactly does the Body Control Module do?
The BCM is a computer that manages and controls your vehicle’s body-related electronic accessories. This includes power windows, locks, lights, wipers, security system, and keyless entry, ensuring they all work together as intended.
Is this module ready to install when I receive it?
Yes, it comes fully programmed to your vehicle’s VIN with the latest GM software. You must provide your VIN after purchase for this service. While it’s plug-and-play, some models may require minor post-installation relearn procedures for systems like the airbags or brakes.
What happens if I forget to provide my VIN?
Providing your VIN is mandatory. We cannot program or ship the module without it, as it is essential for the part to function correctly in your specific vehicle. Your order will be held until the VIN is received.
Do I need to send my old BCM back?
No, there is no core charge for this part. You can keep your original module.
My airbag light is on after installing the new BCM. Is it defective?
No, this is normal for some vehicles. 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 using a professional-grade diagnostic tool to sync the modules and turn off the light.
Which part numbers does this module replace?
This module is a direct replacement for a wide range of part numbers, including 10382479, 15819552, 20815898, 22860591, 25892622, and many more as listed in the fitment details.