Are you experiencing frustrating and unpredictable electrical problems in your Chevrolet Impala or other GM vehicle? Issues like flickering lights, malfunctioning power windows and locks, a faulty security system, or inaccurate instrument cluster readings are often signs of a failing Body Control Module (BCM). The BCM is the central command center for your vehicle’s body electronics, and when it fails, it can cause a cascade of confusing and disruptive symptoms. Don’t let a faulty module compromise your vehicle’s functionality and your peace of mind. This is the definitive, reliable solution to restore your car’s electronic systems to perfect working order.
This replacement Body Control Module, corresponding to part number 20935349 and many others, is the ideal fix for your vehicle. We take the guesswork and hassle out of the replacement process. Unlike a generic module from a dealership or parts store, this unit comes pre-programmed specifically for your vehicle using your VIN. This critical step ensures that the module communicates flawlessly with all other computers in your car, retaining all the specific options and features your vehicle came with from the factory. Simply provide your VIN at checkout, and our technicians will flash the module with the latest GM software updates before it ships. This means a smoother installation and a higher likelihood of a first-time fix.
Expert Pro Tip
Before replacing your BCM, always perform a thorough check of your vehicle’s battery and grounding points. A weak battery, loose connection, or corroded ground strap (especially the main chassis and engine grounds) can cause low voltage conditions that mimic the symptoms of a failing BCM. A few minutes with a multimeter can save you from replacing a perfectly good module.
Solving Your 2006-2013 Impala Body Control Module Issues
A failing Impala Body Control Module can manifest in numerous ways, often starting as minor annoyances and escalating into major problems. You might notice that your key fob works intermittently, your interior dome lights refuse to turn off, or your radio behaves erratically. These aren’t separate, unrelated issues; they are often interconnected symptoms pointing directly to the BCM. This module acts as a traffic cop for data signals between switches (like your window switch) and the components they operate (the window motor). When the BCM’s internal circuits or logic fail, these signals get lost or misinterpreted, leading to the unpredictable behavior you’re seeing. By replacing your old, faulty unit with this pre-programmed module, you are installing a fresh, reliable nerve center for your vehicle’s electronics.
Common Symptoms of a Failing BCM
- ✔ Intermittent or non-functional power windows, door locks, and mirrors.
- ✔ Erratic behavior from interior or exterior lighting (flickering, staying on, or not turning on).
- ✔ Security system faults, including random alarm activation or an inability to start the vehicle (Passlock/Passkey issues).
- ✔ Inoperative or inaccurate gauges on the instrument panel.
- ✔ Malfunctioning radio, climate controls, or other interior accessories.
- ✔ Warning lights on the dash, such as the airbag or service vehicle light.
- ✔ Key fobs that stop working or have a significantly reduced range.
Installation and Post-Install Considerations
Physical installation of this module is typically straightforward, often located under the driver’s side dash. However, because this module integrates with critical safety systems, some post-installation procedures may be required. If your airbag warning light illuminates after installation, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure to sync the new BCM with the airbag system. Additionally, a ‘Brake Pedal Position Relearn’ might be necessary to ensure proper brake light and traction control operation. While our VIN programming handles the most complex part of the job, always be prepared for these potential final steps. We make the process easier with a no-core-charge policy, so you can keep your original module without the hassle of shipping it back.
This module is a direct replacement for a wide range of GM vehicles beyond the Chevrolet Impala, including models like the Equinox, Acadia, Tahoe, Savana, and Cadillac CTS. Please verify your original part number against our extensive cross-reference list and consult the detailed fitment chart to confirm compatibility with your exact year, make, and model.
Frequently Asked Questions
What does a Body Control Module (BCM) do?
The BCM is a computer in your vehicle that controls and monitors a wide variety of non-engine-related electronic functions. This includes power windows, locks, lights, wipers, the security system, climate controls, and more. It acts as the central hub for these systems.
How do I know for sure that my BCM is failing?
Diagnosing a BCM requires ruling out other potential causes first, such as fuses, relays, wiring, and grounds. However, if you are experiencing multiple, seemingly unrelated electrical issues from the list of common symptoms, a faulty BCM is the most likely culprit.
Why do you need my Vehicle Identification Number (VIN)?
Your vehicle’s VIN allows us to program the BCM with the exact software and calibrations for your specific model, trim level, and factory-installed options. This ensures seamless integration and proper function of all features, preventing the need for an expensive trip to the dealership for programming.
Is this module difficult to install?
The physical replacement is generally a simple unbolt-and-unplug process. For a DIYer with basic tools, it’s very manageable. The key is that our pre-programming service eliminates the most difficult step, which is the software setup. However, be aware that some vehicles may require additional relearn procedures with a scan tool after installation.
What happens after I install this programmed BCM?
After installation, most of your vehicle’s functions should be immediately restored. In some cases, as noted in our instructions, you may need a technician with a high-end scan tool to perform a ‘Brake Pedal Position Relearn’ or an ‘Airbag System Sync’ to clear specific warning lights. This is normal for certain models.
Will this fit vehicles other than the 2006-2013 Impala?
Yes. This BCM, part number 20935349, is compatible with a very wide range of General Motors vehicles, including various model years of the Equinox, Tahoe, Acadia, Express/Savana vans, and more. Please check the detailed fitment list on this page to confirm it matches your vehicle.