Is Your GM Vehicle Experiencing Bizarre Electrical Issues?
If you’re dealing with flickering lights, malfunctioning power windows and locks, a security light that won’t turn off, or even a no-start condition, a failing Body Control Module (BCM) is likely the culprit. The BCM is the central command center for your vehicle’s body electronics, and when it fails, it can cause a wide range of frustrating and seemingly unrelated problems. This module is the key to restoring order and getting your truck or van back to full functionality.
From the Diagnostic Bay
We had a 2002 Silverado in the shop that was driving the owner crazy. The radio would turn on and off by itself, the dome light would stay on, and occasionally the truck just wouldn’t start. He had already replaced the battery and checked the alternator. After hooking up our scanner, we noticed communication errors pointing to the BCM. Once we swapped in a VIN-programmed BCM like this one, all the electrical gremlins vanished. It’s a common failure point that can mimic many other problems.
Common Symptoms of a Failing GM BCM
- ✔ Intermittent or non-functional power windows, door locks, or mirrors.
- ✔ Erratic behavior from the instrument cluster gauges or warning lights.
- ✔ The security or anti-theft light stays on, preventing the engine from starting.
- ✔ Interior or exterior lights that don’t work correctly (stay on, flicker, or won’t turn on).
- ✔ Problems with the radio or climate control systems.
- ✔ Unexplained battery drain when the vehicle is off.
A Simple, Reliable Solution: The 2002-2005 Astro BCM
Don’t let a faulty module keep you off the road. This Body Control Module is a direct-fit replacement for a wide range of GM trucks and vans, including the Chevy Astro, Silverado, Tahoe, and GMC Sierra. We take the guesswork out of the repair by programming the module to your vehicle’s specific VIN before it ships. This ensures compatibility with your vehicle’s options and systems. Simply provide your VIN at checkout, and we’ll handle the rest. This is the most straightforward way to get a working, updated 2002-2005 Astro BCM or compatible module for your GM vehicle.
Installation and Post-Install Procedures
Installation is typically straightforward, but please be aware of the following potential requirements after the new module is installed. These procedures may be necessary to ensure all vehicle systems communicate correctly.
- Airbag System Sync: If the airbag warning light comes on after installation, the ‘Setup SDM Primary Key in BCM’ procedure will need to be performed with a professional diagnostic tool to sync the system and turn off the light. This is only required if the light is on.
- Brake Pedal Position Relearn: A brake pedal position sensor recalibration may be necessary on some models to ensure proper brake light function and traction control system performance.
Specific procedures can vary by vehicle. Always consult a factory service manual or a qualified technician for guidance.
Compatible Part Numbers:
This module is a direct replacement for part numbers: 15063578, 15081796, 15095334, 19208537, DKAK, DPNU. Please verify your original part number to ensure compatibility.
Frequently Asked Questions
Do I need to program this BCM?
No. We handle all the programming for you before shipping. Just provide your vehicle’s VIN during or after checkout, and the module will arrive ready for installation.
What does the Body Control Module do?
The BCM acts as the central computer for your vehicle’s body electronics. It controls features like power windows, locks, interior and exterior lighting, the security system, and wipers.
Where is the BCM located on my vehicle?
Location varies. On 2002-2005 Astro and Safari vans, it’s typically in the center of the dash. On trucks like the Silverado, Sierra, and Yukon, it’s usually found under the steering column.
Is there a core charge?
No, there is no core charge for this part. You can keep your original module.
Will this fix my ‘Security’ light issue?
In many cases, yes. A failing BCM is a very common cause for a persistent security light and a no-start condition in these GM vehicles. This VIN-programmed module is designed to resolve that communication error.