If you’re dealing with baffling electrical issues in your GMC Yukon or other GM truck, you’ve come to the right place. As a technician with over two decades of experience, I’ve seen firsthand how a failing Body Control Module (BCM) can cause a cascade of frustrating problems—from a dead instrument cluster to power windows with a mind of their own. This isn’t just an inconvenience; it’s a breakdown in your vehicle’s core comfort and security systems. The BCM is the central command for these functions, and when it fails, your reliable truck can feel like it’s possessed.
This GM 15116066 Body Control Module is the definitive, hassle-free solution. We take the guesswork and dealer expense out of the equation. Each module is expertly programmed to your vehicle’s specific VIN before it ships. This means no expensive trips to the dealership for programming. It arrives at your door ready for a true plug-and-play installation, restoring control over your lights, locks, HVAC system, and more, right out of the box. It’s the same quality and reliability you’d expect from an OEM part, designed to get you back on the road with confidence.
A Technician’s Notebook: The Intermittent Fault
A 2005 Yukon XL came into my bay with a classic BCM failure story. The owner was at his wit’s end. The radio would cut out, the driver’s side power window wouldn’t work on hot days, and the security light would flash randomly, sometimes causing a no-start condition. He’d already replaced the battery and checked grounds. After plugging in my scanner, I saw a handful of ‘loss of communication’ codes with various modules. This is a hallmark of a failing BCM. Instead of spending hours chasing phantom electrical gremlins, we installed a VIN-programmed BCM. In under 10 minutes, every single issue was resolved. It’s a testament to how this single component can restore a vehicle’s functionality and an owner’s peace of mind.
Is Your GM Truck Showing These Telltale Signs?
A failing BCM often creates symptoms that can be mistaken for other issues. Here’s what to look for:
- ✔ Inoperative or erratic power windows, door locks, or interior lights.
- ✔ HVAC blower motor not working or climate controls are unresponsive.
- ✔ The security system acting up, leading to unexpected alarms or no-start situations.
- ✔ An airbag light that stays on, often with a related DTC like B1001 (Option Configuration Error).
- ✔ A cluster of seemingly unrelated diagnostic trouble codes (DTCs) stored in the system.
- ✔ Wipers or exterior lighting functioning intermittently or not at all.
Your 5-Minute Path to a Perfect Install
This repair is one of the most straightforward you can do. For most models like the Yukon, Tahoe, or Silverado, the BCM is located right under the driver’s side dashboard.
- Safety First: Always disconnect the negative terminal on your vehicle’s battery to prevent any electrical shorts and to help reset the system.
- Locate the Module: Find the BCM, which is typically a black plastic box with several large multi-pin connectors, located under the steering column area.
- Swap the Connectors: Carefully release the locking tabs on the electrical connectors and unplug them from the old BCM. Plug them firmly into your new, pre-programmed module. The connectors are keyed and will only fit in their correct slots.
- Reconnect and Test: Reconnect your battery terminal. Start the vehicle and test all the functions: power windows, door locks, radio, HVAC, and lights to confirm the repair was successful.
Post-Installation Note: In some cases, particularly if your airbag light was on previously, a professional scan tool may be needed to perform the ‘Setup SDM Primary Key in BCM’ procedure to sync the modules. This is a simple procedure for any qualified shop. Also, a Brake Pedal Position relearn might be required on certain models.
Verified Fitment for Your GM Truck or SUV
This module is a direct replacement for part number 15116066 and is interchangeable with a wide range of other part numbers, including 15136225, 15198116, and 10383536. It is designed for a broad array of General Motors vehicles. Please verify your model and year below:
- Cadillac: Escalade, ESV, EXT (2003-2006)
- Chevrolet: Avalanche 1500/2500 (2003-2006), Silverado & Sierra 1500/2500/3500 (2003-2007 Classic), Suburban 1500/2500 (2003-2006), Tahoe (2003-2006), Express Van (2004-2007)
- GMC: Sierra Denali (2003-2007 Classic), Yukon & Yukon XL 1500/2500 (2003-2006), Savana Van (2004-2007)
- Hummer: H2 (2003-2007)
Frequently Asked Questions
Do I need to have this BCM programmed by a dealer?
No. This is the biggest benefit of our service. We program the module to your vehicle’s VIN before shipping, so it arrives ready to install without any need for a dealer visit.
Is this a difficult part to install myself?
Not at all. For most DIYers with basic tools, this is a 5-10 minute job. The BCM is easily accessible under the driver-side dash on most compatible trucks and SUVs.
What does ‘No Core Charge’ mean?
It means you don’t have to send your old, faulty BCM back to us. This saves you the time, hassle, and expense of return shipping.
Will this fix my airbag light?
If the airbag light is on due to a communication error with the BCM (like DTC B1001), then yes, this will resolve the root cause. However, after installation, the system may require a ‘SDM Key Sync’ with a pro-level scan tool to turn the light off.
How do I provide my VIN for programming?
You will be prompted to enter your vehicle’s 17-digit VIN during the checkout process. Please double-check it for accuracy to ensure perfect programming.