Restore Your SUV’s Electrical Functions with a Precision-Programmed BCM
Are you experiencing frustrating electrical issues with your Chevrolet Trailblazer, GMC Envoy, or other GM SUV? Flickering lights, malfunctioning power windows and locks, erratic gauges, or a vehicle that refuses to start are common signs of a failing Body Control Module (BCM). The BCM is the central nervous system for your vehicle’s body electronics, and when it fails, it can cause a wide range of confusing and disruptive problems. This replacement BCM, part number 15122670, is the definitive solution to restore your vehicle’s factory performance and reliability.
Unlike a generic part from a local store, this BCM is not a one-size-fits-all solution. We take your vehicle’s unique Vehicle Identification Number (VIN) and program the module specifically for your truck’s options and features. It arrives loaded with the latest software updates from GM, ensuring optimal performance and communication with other modules in your vehicle. This eliminates the need for an expensive trip to the dealership for programming, saving you time and money.
Common Symptoms of a Failing BCM
If your vehicle is exhibiting any of the following issues, a faulty BCM is the likely culprit. Replacing your failing unit with our pre-programmed module can resolve these problems:
- ✔ Intermittent or non-functional power windows, door locks, or mirrors.
- ✔ Erratic behavior from the instrument cluster gauges or warning lights.
- ✔ Headlights, taillights, or interior lights staying on or not working at all.
- ✔ The security or anti-theft system preventing the engine from starting.
- ✔ Inoperative radio or climate control functions.
- ✔ False warnings on the driver information center (DIC).
- ✔ Communication errors with diagnostic scan tools.
Why Choose Our Pre-Programmed 2002-2005 Trailblazer BCM?
This isn’t just a replacement part; it’s a complete, ready-to-install solution. The key is in the programming. The BCM manages critical functions tied to your specific vehicle build. Our process ensures that when you receive your module, it’s a perfect electronic match. Simply provide your VIN at checkout, and our technicians will handle the complex flashing process. This direct-fit module is designed to replace a range of original part numbers, including 15122670, 15065293, 15114669, 15191621, and 9352135, ensuring broad compatibility across numerous GM models.
Installation and Post-Install Considerations
This BCM is typically located on the side of the front fuse box. Installation is straightforward for those with mechanical experience. After installing your new 2002-2005 Trailblazer BCM, some vehicles may require additional steps to ensure all systems are synchronized. Please be aware of the following potential procedures:
- Airbag System Sync: If the airbag warning light is illuminated after installation, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure. This syncs the new BCM with the airbag system’s Sensing and Diagnostic Module (SDM).
- Brake Pedal Position Relearn: In some cases, a brake pedal position sensor recalibration may be necessary for proper brake light and traction control operation.
There is no core charge for this module. You can keep your original part, eliminating the hassle and expense of shipping a core back.
Frequently Asked Questions
What does a BCM do on my 2003 Trailblazer?
The Body Control Module (BCM) acts as a central computer for your vehicle’s non-engine related functions. It controls power windows, door locks, interior and exterior lighting, the security system, wipers, and instrument cluster warnings, among other things.
Is this BCM truly plug-and-play?
Yes, because we program it to your vehicle’s VIN before shipping, it is designed to be a plug-and-play installation. However, as noted, some models may require a simple relearn procedure for the airbag or brake systems, which may require a professional scan tool.
How do I provide my VIN?
After you complete your purchase, you will need to send us your 17-digit VIN. We cannot program and ship the module without it. Please double-check the VIN for accuracy to ensure correct programming.
Do I need to send my old BCM back?
No. This product comes with no core charge, so you are not required to return your original module. This saves you time and return shipping costs.
Will this fix my ‘Service 4WD’ light?
While the BCM communicates with many systems, a ‘Service 4WD’ light is more commonly caused by a faulty Transfer Case Control Module (TCCM), encoder motor, or front axle actuator. A proper diagnosis is recommended to pinpoint the exact cause.