Is Your Vehicle Experiencing Baffling Electrical Problems?
If your Cadillac, Chevrolet, or GMC is suddenly acting haunted—with flickering lights, unresponsive power windows, a malfunctioning security system, or strange dashboard warnings—the culprit is often a failing Body Control Module (BCM). The BCM acts as the central command center for your vehicle’s body electronics, managing everything from the interior lights and power locks to the climate control and anti-theft system. When it starts to fail, it can cause a cascade of confusing and frustrating issues that can be difficult to diagnose.
From the Diagnostic Bay
We once had a 2010 Cadillac STS come into the shop with a list of symptoms that made no sense together. The driver’s side window wouldn’t go down, the radio volume would randomly change, and the key fob only worked intermittently. The owner had already replaced the window switch and the key fob battery with no luck. After connecting our scan tool, we saw multiple communication error codes between various modules. This is a classic sign. Instead of chasing individual component failures, we went straight to the BCM. A faulty Body Control Module was sending corrupt data across the network, causing chaos. Replacing it with a properly programmed unit solved every single issue at once.
Common Symptoms of a Failing BCM
- ✔ Intermittent or non-working power windows, door locks, and mirrors.
- ✔ Erratic behavior from interior or exterior lights (staying on, not turning on, or flickering).
- ✔ Malfunctioning security system, including random alarm activation or inability to start the vehicle.
- ✔ Incorrect readings on the instrument cluster gauges or warning lights that won’t turn off.
- ✔ Climate control system not responding to commands.
- ✔ Keyless entry and remote start features working unreliably or not at all.
- ✔ Communication error codes (U-codes) when scanned with a diagnostic tool.
The Direct-Fit, Programmed Solution for Your GM Vehicle
Don’t let a faulty BCM keep your vehicle off the road. This replacement 2010 STS Body Control Module is the definitive solution to restore full functionality to your car’s electronics. We take the guesswork and hassle out of the repair by pre-programming the module specifically for your vehicle. Simply provide us with your Vehicle Identification Number (VIN) after purchase, and our technicians will flash the unit with the latest, most stable software updates directly from GM. This ensures perfect compatibility and communication with all other modules in your vehicle, right out of the box.
This module is a direct replacement for a wide range of part numbers, including 15921353, 22860591, 20815898, and many more. It is designed to fit an extensive list of GM models, from the Chevrolet Impala and Equinox to the GMC Acadia and Cadillac DTS. Please verify your part number and check the fitment list to ensure compatibility.
Installation and Post-Install Requirements
While this module is delivered ready for installation, some vehicles may require minor post-installation procedures to ensure all systems are perfectly synchronized. These are standard industry procedures that can be performed by a qualified technician with a professional scan tool.
- Airbag System Sync: If the airbag warning light is illuminated after installation, a ‘Setup SDM Primary Key in BCM’ procedure is necessary to sync the new BCM with the airbag system.
- Brake Pedal Position Relearn: To ensure proper brake light and traction control operation, a brake pedal position sensor recalibration might be required on certain models.
Please note: Specific procedures can vary. Always consult a factory service manual or a qualified technician for guidance tailored to your exact vehicle.
Frequently Asked Questions
What exactly does the Body Control Module do?
The BCM is a computer that controls and monitors the various electronic accessories in your vehicle’s body. This includes power windows, locks, lights, wipers, the security system, and more. It acts as a gateway, allowing different electronic systems to communicate with each other.
Why do you need my VIN number?
Your vehicle’s VIN is essential for us to program the BCM correctly. It contains specific information about your car’s factory-installed options, security system, and software calibration. Programming the module to your VIN ensures it works seamlessly with your vehicle, just like the original part.
Is this a difficult part to install?
The physical installation is typically straightforward. The BCM is usually located under the dashboard on the driver’s or passenger’s side. However, accessing it may require removing some interior trim panels. If you are not comfortable with automotive electrical work, we recommend professional installation.
Will I need a dealership to program this module?
No. The main benefit of our service is that we handle all the programming before we ship the part to you. This saves you a trip to the dealership and the associated programming fees. In most cases, it is a plug-and-play installation, though some vehicles may require the simple relearn procedures mentioned above.
What happens if the post-installation procedures are not performed?
If a required procedure like the airbag sync is not done, you may have a persistent warning light on your dash (e.g., the airbag light). If a brake pedal relearn is needed but not performed, it could affect the operation of your brake lights or traction control system. It’s best to have these checked by a technician if any issues arise after installation.
Do I need to send my old BCM back?
No, there is no core charge for this part. You can keep your original module.