Are you battling frustrating electrical gremlins in your GM truck or van? Flickering lights, malfunctioning power windows and locks, a dead instrument cluster, or a security light that prevents your vehicle from starting 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 fails, it can cause a wide range of confusing and intermittent issues. Stop chasing symptoms and replace the core problem with this direct-fit, VIN-programmed BCM.
This isn’t just a replacement part; it’s a complete solution. We take the hassle out of the repair by pre-programming this module to your vehicle’s specific VIN before it ships. This means it arrives ready for installation, loaded with the latest GM software updates to ensure optimal performance and communication with your vehicle’s other electronic systems. You get a reliable repair without the need for an expensive trip to the dealership for programming.
Common Symptoms of a Failing GM BCM
- ✔ Erratic or non-functional power windows, door locks, or mirrors.
- ✔ Interior or exterior lights that stay on, flicker, or don’t work at all.
- ✔ The security or anti-theft light is illuminated, often causing a no-start condition.
- ✔ Instrument cluster gauges behaving erratically or not working.
- ✔ Horn honking unexpectedly or not working when pressed.
- ✔ Problems with the radio or climate control functions.
- ✔ False warning messages on the driver information center.
Your Plug-and-Play Solution: The 2002-2005 Blazer BCM
This replacement Body Control Module is the definitive fix for these widespread issues. By providing your VIN during checkout, you ensure that the module you receive is perfectly matched to your vehicle’s factory options. This eliminates communication errors and compatibility problems, streamlining your repair process. This module is a direct replacement for multiple part numbers, including 15063578, 15081796, 15095334, 19208537, DKAK, and DPNU.
Installation and Post-Install Notes
While this module is delivered ready to install, some vehicles may require minor post-installation procedures. These are simple ‘relearn’ or ‘sync’ steps that a professional scan tool can perform in minutes.
- Airbag System Sync: If your airbag warning light is on after installation, a ‘Setup SDM Primary Key in BCM’ procedure is needed to sync the new BCM with the airbag system.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration may be necessary to ensure correct brake light and traction control operation.
There is no core charge for this part. You can keep your old module without the hassle of returning it.
Frequently Asked Questions
What does the Body Control Module (BCM) do?
The BCM acts as the main computer for your vehicle’s body and cabin electronics. It controls functions like power windows, locks, lights, the security system, wipers, and the instrument cluster.
Do I need to get this BCM programmed?
No. We handle the programming for you before we ship the part. Simply provide your vehicle’s 17-digit VIN at checkout, and the module will arrive flashed with the latest GM software for your specific vehicle.
Where is the BCM located on a 2003 Chevy Blazer or GMC Jimmy?
On most 2002-2005 Blazer, Jimmy, S10, and Sonoma models, the BCM is located in the center of the dashboard, often behind the radio or climate control panel. On larger trucks and SUVs like the Silverado or Tahoe, it’s typically found under the steering column.
Will this fix my truck’s security light and no-start problem?
A faulty BCM is the most common cause of issues with the GM Passlock security system. Replacing it with our pre-programmed module is a very effective way to solve these persistent security-related starting problems.
What happens if my airbag light comes on after I install this?
This indicates the new BCM needs to be electronically introduced to the vehicle’s airbag module (SDM). A technician with a professional-grade scan tool will need to perform the ‘Setup SDM Primary Key in BCM’ procedure to resolve this.
Which part numbers does this module replace?
This module is a direct replacement for several part numbers, including DKAK, DPNU, 15063578, 15081796, 15095334, and 19208537, covering a wide range of GM trucks and vans.