Is Your GM Vehicle Experiencing Bizarre Electrical Problems?
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 locks to the interior lights, security system, and even aspects of the climate control. When the BCM starts to fail, it can create a host of frustrating and seemingly unrelated issues, making your vehicle unreliable and difficult to operate. Don’t let a faulty module disrupt your daily drive.
From the Diagnostic Bay
We had a 2010 Chevy Express van come into the shop with a classic BCM failure symptom: the interior dome lights wouldn’t turn off, no matter what. The owner had already replaced the battery twice. We scanned the system and found multiple communication codes pointing to the BCM. Instead of a costly and time-consuming trip to the dealership, we installed one of our VIN-programmed modules. The lights immediately functioned correctly, and the battery drain was solved. It’s a common story for these vehicles, and a new BCM is often the simple, effective fix.
Symptoms of a Failing GM Body Control Module
- ✔ Power windows, door locks, or mirrors operating erratically or not at all.
- ✔ Interior or exterior lights staying on, flickering, or not turning on.
- ✔ Vehicle’s anti-theft or security system malfunctioning or preventing the car from starting.
- ✔ Horn honking randomly or not working when pressed.
- ✔ Inaccurate or non-functional gauges on the instrument cluster.
- ✔ A/C and heater blower motor issues.
- ✔ Intermittent no-start condition where the engine cranks but won’t fire.
The Simple, Reliable Solution
Replacing your faulty BCM doesn’t have to mean a trip to the dealership for expensive diagnostics and programming. This replacement GM Body Control Module is the perfect solution to restore your vehicle’s full functionality. We take the hassle out of the process by pre-programming the module to your vehicle’s specific VIN before it ships. This ensures compatibility with your vehicle’s options and systems. Using the latest GM software updates, this module is ready for installation right out of the box, saving you time and money.
Installation and Post-Install Steps
While this module is designed for a straightforward installation, some vehicle systems may require a relearn procedure after the new BCM is connected. This is a normal part of the process to ensure all components communicate correctly.
- Airbag System Sync: If the airbag warning light is illuminated 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 system.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration might be necessary to ensure correct brake light operation and to keep the traction control system happy.
There is no core charge for this part. You can keep your old module.
Frequently Asked Questions
What does a Body Control Module (BCM) do?
The BCM is a computer that acts as the central hub for your vehicle’s body-related electronic features, such as lights, windows, locks, security systems, and climate controls.
Why do you need my VIN?
We require your Vehicle Identification Number (VIN) to program the BCM with the correct software and settings for your specific vehicle’s options. This ensures it works correctly right out of the box.
Is this part difficult to install?
The physical installation is typically straightforward, involving disconnecting the battery and swapping the module. However, some vehicles may require post-installation relearn procedures with a professional scan tool, as noted in the description.
Will this fix my ‘Service Theft System’ message?
A failing BCM is a very common cause of security system faults and ‘Service Theft System’ messages. Replacing it with this pre-programmed module often resolves these issues.
What happens if I don’t do the post-install relearn procedures?
If a relearn is required and not performed, you may experience issues like a persistent airbag light or improper brake light function. It’s crucial to follow any necessary procedures for your specific model to ensure full system functionality and safety.