Are you chasing down frustrating electrical gremlins in your GMC Sierra or another GM truck? One day the power windows work, the next they don’t. Maybe your A/C is acting up, or you’re getting a persistent airbag light. As a technician with over two decades of experience, I’ve seen these exact issues hundreds of times, and they almost always point to a failing Body Control Module (BCM). This module is the central command center for your truck’s body electronics, and when it fails, it can cause system-wide chaos. This replacement BCM, equivalent to part number 15136877, is the definitive solution to restore your vehicle’s functionality and reliability.
The biggest headache with replacing a BCM has always been the mandatory, expensive trip to the dealership for programming. We eliminate that completely. We pre-program this module to your vehicle’s specific VIN before it ships, ensuring it works correctly right out of the box. This means your truck’s security system, options, and other electronic features will sync up seamlessly. This isn’t just a part; it’s a complete, hassle-free repair for your 2003-2007 Sierra 3500 BCM and other compatible GM models.
From the Diagnostic Bay: The Case of the Haunted Sierra
A customer brought in his ’06 Sierra 2500 HD with a list of bizarre symptoms: the radio would turn off randomly, the door locks would cycle while driving, and the HVAC blower was intermittent. He’d already replaced the battery and checked all the grounds. After connecting my scan tool, I found a slew of communication DTCs pointing to the BCM. These modules, especially on work trucks that see a lot of vibration and temperature swings, can develop internal circuit board failures. Swapping in a VIN-programmed BCM like this one resolved all the issues in under 15 minutes. It’s the most common and reliable fix for these ghost-in-the-machine problems.
Is Your Truck Showing These Telltale Signs?
A failing BCM can manifest in numerous ways. If you’re experiencing any of the following, it’s a strong indicator that your module needs replacement:
- ✔ Intermittent or non-functional power windows, door locks, or interior lights.
- ✔ HVAC system problems, such as a blower motor that won’t turn on or erratic temperature control.
- ✔ An active airbag warning light, often accompanied by Diagnostic Trouble Code (DTC) B1001.
- ✔ Security system malfunctions, including a no-start condition where the engine cranks but won’t fire.
- ✔ Unpredictable behavior from windshield wipers or exterior lighting.
- ✔ A cluster of communication codes (U-codes) stored in various modules.
Your 5-Minute Path to a Perfect Fix
Replacing your old BCM is a straightforward job that most DIYers can handle with basic tools. Here’s a simple guide to get you back on the road:
- Safety First: Always disconnect the negative terminal from your vehicle’s battery to prevent electrical shorts and help reset system memory.
- Locate the Module: On most Sierra, Silverado, and SUV models, the BCM is located under the driver’s side dash, near the steering column. On Express and Savana vans, it’s typically behind the center dash panel.
- Swap the Part: The BCM is held in place by retaining clips. Carefully unplug the electrical connectors (they have locking tabs), release the clips, and remove the old module. Slide the new, pre-programmed module into place and securely reconnect all connectors.
- Power Up & Verify: Reconnect the battery terminal. Start the vehicle and test all the functions the BCM controls: lights, locks, windows, wipers, and HVAC.
- Post-Installation Checks: In some cases, an additional procedure may be needed. If the airbag light remains on, a scan tool is required to perform the ‘Setup SDM Primary Key’ function. This re-establishes communication between the new BCM and the airbag system. A brake pedal position relearn might also be necessary on certain models.
Remember, this module has no core charge, so you don’t have to worry about the cost or hassle of sending your old part back.
Verified Fitment for Your GM Truck, SUV, or Van
This BCM is a direct-fit replacement for a wide range of General Motors vehicles, ensuring OEM-level performance. It is interchangeable with part numbers 10383536, 15116066, 15136225, 15137393, and more. While this is the correct 2003-2007 Sierra 3500 BCM, please confirm your model and options below:
- Chevrolet: Avalanche 1500/2500 (02-06), Silverado 1500/2500/3500 (03-07 Classic), Suburban 1500/2500 (03-06), Tahoe (03-06), Express/Savana Van (04-07 w/ PRP)
- GMC: Sierra 1500/2500/3500 (03-07 Classic), Sierra Denali (03-07 Classic), Yukon/Yukon XL 1500/2500 (03-06)
- Cadillac: Escalade, ESV, EXT (03-06)
- Hummer: H2 (03-07)
What does a VIN-programmed BCM mean for me?
What does a VIN-programmed BCM mean for me?
It means the module arrives ready for installation with no extra steps. We load your vehicle’s specific software using your VIN, so it communicates perfectly with your truck’s existing systems, like the engine computer and security features. This saves you from a costly programming fee at a dealership.
Do I need to send my old BCM back?
No. This product comes with no core charge. You can keep your original module without any extra fees or hassle, making the repair process simpler and more convenient for you.
Will this fix my airbag light with a B1001 code?
A faulty BCM is a common cause of the B1001 code and an illuminated airbag light. Replacing it often resolves the issue. However, after installation, you may need a professional scan tool to perform the ‘Setup SDM Primary Key in BCM’ procedure to sync the new module with the airbag system and clear the light.
Where is the BCM located on my 2005 Sierra 3500?
On a 2003-2007 GMC Sierra 3500 Pickup, the Body Control Module is typically found under the driver-side dashboard, mounted near the steering column. It is usually a black plastic box with several large multi-pin electrical connectors.
Is this compatible with other part numbers?
Yes, this module is a direct replacement and interchangeable with a long list of GM part numbers, including 15116066, 15136225, 15198116, 10383536, and many others, ensuring wide compatibility across the GM truck and SUV platform from this era.