Are you battling frustrating electrical problems in your GM truck or SUV? Issues like flickering interior lights, malfunctioning power windows and locks, or a security system that prevents your vehicle from starting are often signs of a failing Body Control Module (BCM). The BCM acts as the central hub for your vehicle’s body electronics, and when it fails, it can cause a wide range of confusing and intermittent symptoms. This replacement BCM is the definitive solution to restore full functionality and reliability to your vehicle.
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take the hassle out of the repair by pre-programming the module to your vehicle’s specific Vehicle Identification Number (VIN) before it ships. This means you get a part loaded with the latest GM software updates that’s ready for installation right out of the box, saving you a costly trip to the dealership for programming.
Common Symptoms of a Failing BCM
If you’re experiencing any of the following, a faulty BCM could be the culprit:
- ✔ Erratic or non-functional power windows, door locks, or mirrors.
- ✔ Interior lights or dashboard lights flickering, staying on, or not working at all.
- ✔ The vehicle’s security system (Passlock) activating incorrectly, causing a no-start condition.
- ✔ Horn honking unexpectedly or not working when pressed.
- ✔ Wipers behaving erratically or not parking in the correct position.
- ✔ Communication errors with other vehicle modules (DTC U-codes).
Your Direct-Fit 2002-2005 Blazer BCM Solution
This module is a direct replacement for a wide range of GM trucks, vans, and SUVs from the early 2000s. It is compatible with original equipment part numbers 15063578, 15081796, 15095334, 19208537, DKAK, and DPNU. By providing your VIN, you ensure that the 2002-2005 Blazer BCM you receive is perfectly matched to your vehicle’s specific options and configuration.
Installation and Post-Install Notes
Installation is typically straightforward, involving locating the old module (often in the center dash or under the steering column), disconnecting the battery, swapping the modules, and reconnecting the battery. However, in some cases, additional steps may be needed:
- Airbag System Sync: If your airbag warning light is illuminated after installation, a ‘Setup SDM Primary Key in BCM’ procedure is required. This syncs the new BCM with the airbag system and must be performed with a professional-grade scan tool.
- Brake Pedal Position Relearn: Some models may require a brake pedal position sensor relearn to ensure correct brake light and traction control operation.
Please consult a factory service manual or a qualified technician for procedures specific to your vehicle.
Frequently Asked Questions
What is a BCM and what does it do?
The Body Control Module (BCM) is a computer in your vehicle that manages and controls electronic accessories like power windows, locks, lights, wipers, and the security system. It’s the brain for your vehicle’s comfort and convenience features.
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 part until we receive this information, as the programming is essential for the module to work in your vehicle.
Will I need to do any programming myself?
No. The main benefit of our service is that we handle all the programming for you. The BCM will arrive ready to be installed, with no need for an expensive trip to a mechanic or dealer for programming.
Is this BCM difficult to install?
For most DIY mechanics, the physical installation is a simple plug-and-play process. The module is typically located in the center dash area. However, always disconnect the battery before starting and be aware of the potential post-installation procedures mentioned.
What if my airbag light is on after I install the BCM?
This is not a defect in the part. It means the new BCM needs to be electronically introduced to your vehicle’s airbag module (SDM). This requires a ‘Setup SDM Primary Key in BCM’ procedure, which can be done by a repair shop with a high-level diagnostic tool.
Do I need to send my old part back?
No. This part is sold without a core charge. You can keep your original module.