Are you battling frustrating electrical issues in your GM truck or SUV? A faulty Body Control Module (BCM) is often the culprit behind problems like erratic lights, malfunctioning power windows and locks, or even a no-start condition caused by a confused security system. This replacement BCM, part number 15063578, is the definitive solution to restore your vehicle’s electronic functions to factory-perfect operation.
The BCM acts as the central hub for your vehicle’s body electronics. When it fails, it can create a cascade of confusing and intermittent problems that are difficult to diagnose. Instead of spending hours chasing electrical gremlins, you can solve the problem at its source. We make the process simple: upon purchase, provide us with your vehicle’s VIN, and we will program the module with the latest GM software specifically for your truck. This ensures a seamless installation process, getting you back on the road quickly and confidently.
Common Symptoms of a Failing BCM
- ✔ Intermittent or non-functional power windows, door locks, or mirrors.
- ✔ Interior or exterior lights that stay on, flicker, or don’t work at all.
- ✔ The anti-theft or security system light is on, preventing the vehicle from starting.
- ✔ Unexplained battery drain that kills your battery overnight.
- ✔ Dashboard warning lights appearing randomly.
- ✔ Horn, wipers, or radio functioning erratically.
Why Choose Our 2002 Sierra 2500 BCM?
This isn’t just a replacement part; it’s a complete, ready-to-install solution. By programming the module to your specific VIN, we eliminate the need for expensive dealer programming or specialized tools for the initial setup. This 2002 Sierra 2500 BCM arrives at your door ready to be installed. We also ensure it’s loaded with the most current software available from GM, which can resolve issues that were present even in the original factory programming. Plus, with no core charge, you can keep your old module without the hassle of returning a core.
Post-Installation Procedures
While this module is designed for a straightforward installation, some vehicles may require additional steps to sync with other onboard systems:
- Airbag System Sync: If the airbag warning light is illuminated after installation, a technician will need to perform the ‘Setup SDM Primary Key in BCM’ procedure using a professional scan tool. 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 the brake lights and traction control system function as intended.
Please consult a factory service manual or a qualified technician for vehicle-specific instructions.
Frequently Asked Questions
What does the BCM do on my truck?
The Body Control Module (BCM) is a computer that manages and controls many of your vehicle’s non-engine related functions. This includes power windows, power locks, the security system, interior and exterior lighting, wipers, and the radio.
Is this part difficult to install?
The physical installation is typically straightforward, involving unplugging the old module and plugging in the new one. It’s often located under the steering column or behind the center dash. Since we pre-program it, you avoid the complex computer setup, but some minor relearn procedures may be needed post-installation.
How do I provide my VIN for programming?
After you complete your purchase, you will receive instructions on how to send us your vehicle’s 17-digit VIN. We cannot ship your order until we receive and validate your VIN.
Do I have to return my old BCM?
No. This product has no core charge, so you are not required to send your original module back to us.
Will this BCM fix a ‘No Start’ problem?
If your vehicle’s ‘No Start’ issue is caused by the factory anti-theft system (Passlock/VATS) being triggered by a faulty BCM, then yes, this pre-programmed module is designed to resolve that specific problem.