Restore Full Functionality to Your GM Vehicle
Are you battling bizarre electrical gremlins in your truck or SUV? Flickering lights, malfunctioning power windows and locks, a security light that won’t turn off, or even a vehicle that refuses to start can all point to a single culprit: 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 cascade of frustrating and seemingly unrelated issues. This replacement BCM is the definitive solution to restore your vehicle’s electrical systems to factory-perfect operation.
From the Diagnostic Bay
We had a 2004 GMC Jimmy come into the shop with a complaint of the interior lights randomly turning on while driving and the radio presets constantly resetting. The owner had already replaced the battery and checked all the fuses. After connecting our diagnostic tool, we saw multiple communication errors pointing towards the BCM. Instead of a costly and complex wiring chase, we installed a VIN-programmed BCM like this one. The swap took less than 30 minutes, and immediately all the strange electrical issues were gone. It’s a common failure, but thankfully, a straightforward fix.
Common Symptoms of a Failing BCM
- ✔ Erratic or non-functional interior and exterior lights.
- ✔ Power windows, door locks, or mirrors working intermittently or not at all.
- ✔ The security or anti-theft light stays illuminated, preventing the engine from starting.
- ✔ Horn honking unexpectedly or not working when pressed.
- ✔ Inaccurate or dead gauges on the instrument cluster.
- ✔ Rapid battery drain while the vehicle is off.
Why Choose Our Pre-Programmed 2002-2005 Blazer BCM?
Forget expensive dealership visits and the hassle of programming. We make this repair simple. When you order, you provide us with your vehicle’s VIN. Our technicians will then program this module with the latest GM-certified software specific to your exact vehicle configuration. This ensures that when the part arrives, it’s ready for a direct, plug-and-play installation. No special tools, no dealer intervention—just a reliable fix that gets you back on the road quickly. This is the most efficient way to solve your BCM problems.
Important Post-Installation Information
While this module is designed for a simple installation, some vehicles may require additional steps to ensure all systems communicate correctly. Please be aware of the following potential procedures:
- Airbag System Sync: If the airbag warning light is on after installation, a ‘Setup SDM Primary Key in BCM’ procedure is needed. This requires a professional-grade scan tool to sync the new BCM with the airbag system.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration might be necessary for proper brake light and traction control operation.
Always consult a factory service manual or a qualified technician if you are unsure about any part of the installation process.
This module is a direct replacement for part numbers: 15063578, 15081796, 15095334, 19208537, DKAK, DPNU and fits a wide range of GM vehicles including the Chevy Blazer, S10, Silverado, Suburban, Tahoe, Astro, and Avalanche, as well as the GMC Jimmy, Sonoma, Sierra, Yukon, and Safari from 2002-2005. Please verify your part number and check the fitment list to ensure compatibility.
Frequently Asked Questions
What does the Body Control Module (BCM) do?
The BCM is a computer that manages and controls many of your vehicle’s non-engine related functions, such as power windows, locks, lights, security system, wipers, and instrument panel gauges.
Is this part difficult to install?
For most DIY mechanics, the physical installation is straightforward. The BCM is typically located under the dashboard. Because we pre-program the module to your VIN, you avoid the complex programming steps, making it a plug-and-play process.
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 this information.
Do I need to return my old BCM?
No. There is no core charge for this part. You can keep your original module.
What if my airbag light comes on after I install this 2002-2005 Blazer BCM?
This can happen occasionally. It means the new BCM needs to be electronically introduced to the airbag system (SDM). A repair shop with a high-level scan tool can perform the ‘Setup SDM Primary Key in BCM’ procedure to resolve this.
Will this fix my specific electrical problem?
This module will correct issues directly caused by a faulty BCM. If you are experiencing any of the common symptoms listed, there is a very high probability this will be the solution. However, proper vehicle diagnostics are always recommended.