Are you battling frustrating electrical problems in your GMC truck? Unpredictable power windows, a malfunctioning security system, or dashboard warning lights that come and go are common signs of a failing Body Control Module (BCM). The BCM is the central nervous system for your truck’s body electronics, and when it starts to fail, it can cause a wide range of confusing issues. This VIN-programmed Body Control Module, compatible with part number 15194170, is the definitive solution to restore order and reliability to your vehicle’s essential functions.
From the Diagnostic Bay
We had a 2006 Sierra Denali come in with a classic BCM failure case. The owner reported the radio would stay on after he shut the truck off, draining the battery overnight. On top of that, his power door locks worked only when they wanted to. After checking for obvious wiring issues, we pinpointed the BCM. Swapping in a pre-programmed module like this one solved both problems in under 10 minutes. The customer was thrilled to have a reliable truck again without a costly diagnostic and programming bill from the dealership.
Is Your Sierra Denali BCM Failing?
A faulty BCM can manifest in numerous ways. Look out for these common symptoms:
- ✔ Inoperative or intermittent power windows, door locks, or mirrors.
- ✔ HVAC controls not responding or the blower motor acting erratically.
- ✔ The security system preventing the truck from starting or causing false alarms.
- ✔ Interior or exterior lights not working correctly (e.g., staying on or not turning on).
- ✔ An airbag warning light on the dash, often with a B1001 diagnostic trouble code.
- ✔ A cluster of seemingly unrelated electrical issues that defy simple explanation.
Why Choose Our Pre-Programmed 2003-2007 Sierra Denali BCM?
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take the guesswork and extra cost out of the repair by programming the module to your truck’s specific Vehicle Identification Number (VIN) before it ships. This ensures that it communicates perfectly with your vehicle’s other electronic systems right out of the box.
- ✔ Plug & Play Installation: Arrives programmed with the latest GM software updates for your VIN. No dealership visit required for programming.
- ✔ Restores Full Functionality: Corrects faulty electronic accessory behavior and eliminates persistent body-related DTCs.
- ✔ OEM-Standard Quality: Built to meet or exceed original equipment specifications for lasting durability and performance, backed by a one-year warranty.
- ✔ No Core Charge: You are not required to return your old, faulty module, saving you time and hassle.
Installation & Post-Install Notes
Installation is straightforward for the DIY mechanic. The BCM is typically located under the driver’s side dashboard, near the steering column. Simply disconnect the battery, remove the old module, plug in the new one, and reconnect the battery. While this module is designed for a seamless install, be aware of these potential post-installation steps:
- Airbag System Sync: If the airbag light remains on after installation, a ‘Setup SDM Primary Key in BCM’ procedure must be performed with a professional scan tool to sync the systems.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor relearn may be needed to ensure correct brake light and traction control operation.
Always consult a factory service manual or a qualified technician if you are unsure about any step of the process. This module is a direct replacement for multiple part numbers, including 15116066, 15136225, 15194170, and more.
Frequently Asked Questions
What does a BCM do on a 2003-2007 GMC Sierra Denali?
The Body Control Module (BCM) acts as the main computer for your truck’s body electronics. It manages functions like power windows, door locks, interior and exterior lighting, the security system, wipers, and HVAC controls.
Is this BCM ready to install out of the box?
Yes. We pre-program the module to your vehicle’s VIN before shipping. This ensures it works with your specific options and security system for a true plug-and-play installation, with no need for dealer programming.
Where is the BCM located on my 2005 Sierra Denali?
On most 2003-2007 Sierra Denali models, the BCM is located under the driver’s side of the dashboard, typically near the steering column.
What if my airbag light is on after installing the new BCM?
If the airbag warning light is on, it means the new BCM needs to be electronically synced with the airbag system’s computer (SDM). This requires a ‘Setup SDM Primary Key in BCM’ procedure using a professional-grade diagnostic tool.
Do I need to send my old part back?
No. There is no core charge for this part. You can keep or dispose of your original module without any additional fees or hassle.