Are you experiencing a host of bizarre electrical issues in your GM truck or van? Intermittent power windows, flickering lights, a security system that acts on its own, or warning lights that won’t go away are all classic signs of a failing Body Control Module (BCM). The BCM is the central command center for your vehicle’s body electronics, and when it malfunctions, it can make your vehicle frustrating and unreliable. This replacement BCM, part number 15063578, is the definitive solution to restore full functionality and peace of mind.
We take the guesswork and hassle out of the repair. Unlike a generic part from a salvage yard, this BCM is delivered to you fully programmed to your vehicle’s specific VIN. Simply provide us with your VIN after purchase, and our technicians will flash the module with the latest GM software updates. This ensures seamless integration with your vehicle’s existing systems, eliminating the need for an expensive trip to the dealership for programming. It’s a direct-fit, ready-to-install solution.
Solving Problems with a 2002-2005 Astro BCM
A faulty BCM can manifest in numerous ways, often being misdiagnosed as individual component failures. If you’re chasing electrical gremlins, replacing the BCM is often the root-cause solution. This module is the correct fix for a wide range of popular GM vehicles, including the Chevy Astro, Silverado, S10, Blazer, and their GMC counterparts like the Safari, Sierra, and Jimmy.
Common Symptoms of BCM Failure:
- ✔ Erratic or non-functioning power windows, door locks, and mirrors.
- ✔ Interior or exterior lights staying on or not working at all.
- ✔ The security or anti-theft system preventing the vehicle from starting.
- ✔ Inaccurate gauge readings or warning lights on the dash (like the airbag light).
- ✔ Communication errors with other vehicle modules (DTC U-codes).
- ✔ Problems with the radio or climate control functions.
Installation and Post-Install Procedures
Installation is straightforward. On models like the Astro, Blazer, and S10, the BCM is typically located in the center of the dash. On full-size trucks and SUVs like the Silverado, Sierra, and Yukon, it’s usually found under the steering column. While our VIN programming makes this a near plug-and-play process, some vehicles may require additional steps after installation:
- Airbag System Sync: If the airbag warning light is illuminated after you install the new BCM, a procedure called ‘Setup SDM Primary Key in BCM’ must be performed. This requires a professional-grade scan tool to sync the airbag system with the new BCM and clear the light.
- Brake Pedal Position Relearn: On certain models, a brake pedal position sensor relearn may be needed to ensure the brake lights and traction control system function correctly.
Disclaimer: Specific procedures can vary by vehicle. Always consult a factory service manual or a qualified technician for guidance.
Guaranteed Compatibility
This module is a direct replacement for the following part numbers: 15063578, 15081796, 15095334, 19208537, DKAK, DPNU. There is no core charge, so you can keep your original module.
Frequently Asked Questions
What does the Body Control Module (BCM) do?
The BCM is a computer that acts as the central hub for your vehicle’s body electronics. It controls non-engine related functions like power windows, locks, lights, the security system, wipers, and more.
Do I need to get this BCM programmed?
No. This BCM comes pre-programmed to your vehicle’s VIN. Just provide your VIN at checkout, and we will flash the module with the latest software before shipping it to you.
Where is the BCM located on my vehicle?
Location varies by model. For vans and smaller SUVs like the Astro, Safari, Blazer, and S10, it’s typically behind the center dash. For full-size trucks and SUVs like the Silverado, Sierra, and Yukon, it’s usually mounted under the driver’s side dash near the steering column.
What if my airbag light comes on after installation?
This indicates the new BCM needs to be synced with your vehicle’s airbag system (SDM). A mechanic with a professional diagnostic tool will need to perform the ‘Setup SDM Primary Key in BCM’ procedure to resolve this.
Will this fix my ‘Service 4WD’ light?
While the BCM communicates with many systems, a ‘Service 4WD’ light is more commonly related to the Transfer Case Control Module (TCCM) or a sensor/actuator in the 4WD system itself. It’s important to diagnose the specific trouble codes before ordering.