End the Electrical Headaches in Your GM Truck
If you’re dealing with bizarre electrical issues in your 2003-2007 GMC Sierra 1500—like flickering lights, a dead instrument cluster, or power windows with a mind of their own—you’re not alone. These are classic signs of a failing Body Control Module (BCM). The BCM is the central command for your truck’s body electronics, and when it goes, it can cause a cascade of frustrating, hard-to-diagnose problems. This replacement BCM, part number 10383536, is the definitive, hassle-free solution. We pre-program it to your truck’s specific VIN, so it arrives ready for a true plug-and-play installation, getting you back on the road without a costly trip to the dealership.
A Technician’s Notebook
Just last month, a 2006 Sierra 1500 rolled into my bay with a laundry list of complaints from the owner. The radio would cut out, the driver’s side power lock was dead, and the airbag light was on. A quick scan showed a B1001 code (Option Configuration Error) and a few U-series communication codes. These scattered symptoms pointed directly to a faulty BCM. Instead of hours of chasing wires, we installed one of these VIN-programmed modules. After the quick install and an SDM key relearn, every single issue was resolved. The customer saved hundreds compared to a dealer repair and drove away in a truck that felt new again.
Is Your Sierra Showing These Electrical Gremlins?
- ✔ Unresponsive or erratic power windows, door locks, or interior lights.
- ✔ The security system acting up, causing a no-start or crank-no-start condition.
- ✔ HVAC controls not working, or the blower motor running intermittently or not at all.
- ✔ An illuminated airbag warning light, often with Diagnostic Trouble Codes (DTCs) like B1001, B1004, or B1009.
- ✔ Communication loss codes (U-codes) stored in other modules, pointing to the BCM as the source.
- ✔ Horn not working or sounding randomly.
A Straightforward Guide to BCM Installation
Replacing your Sierra 1500 Body Control Module is a job most DIYers can handle in their own driveway. The process is quick and requires basic tools.
- Safety First: Always disconnect the negative terminal from your truck’s battery and wait a few minutes before starting work. This prevents electrical shorts and helps reset the vehicle’s systems.
- Locate the Module: On most Sierra, Silverado, and similar GM trucks/SUVs, the BCM is located under the driver’s side of the dashboard, near the steering column. It’s a black plastic box with several large multi-pin connectors.
- Swap the Part: Carefully unplug the electrical connectors. They have locking tabs that need to be depressed. Once unplugged, unbolt or unclip the old module from its bracket and remove it. Install the new module in its place and securely reconnect all wiring harnesses.
- Reconnect and Test: Reconnect the battery terminal. Start the vehicle and test all functions: lights, wipers, locks, windows, and HVAC to ensure proper operation.
- Post-Installation Steps: In some cases, two procedures may be required using a capable scan tool. To clear an airbag light, perform the ‘Setup SDM Primary Key in BCM’ procedure. If your brake pedal feels off, a ‘Brake Pedal Position Sensor Calibration’ may be needed.
Verified Fitment for Your GM Truck or SUV
This module is a direct replacement for part number 10383536 and is interchangeable with several other part numbers, including 15116066, 15136225, and 15198116. It is guaranteed to fit the following vehicles (among others):
Chevrolet: Silverado 1500/2500/3500 (2003-2007), Tahoe (2003-2006), Suburban (2003-2006), Avalanche (2003-2006), Express Van (2004-2007)
Cadillac: Escalade, ESV, EXT (2003-2006)
Hummer: H2 (2003-2007)
Note: Fitment can depend on specific options like transmission or cab type. Please verify your part number or contact us with your VIN to ensure compatibility.
Frequently Asked Questions
Do I need to program this Sierra 1500 Body Control Module?
No. We pre-program the module to your vehicle’s VIN before shipping. It arrives ready for installation, saving you the time and expense of a dealership visit.
Where is the BCM located on my 2005 GMC Sierra?
The BCM is typically found under the driver’s side dashboard, mounted near the steering column or the central fuse block area.
Will this fix my airbag light?
A faulty BCM is a common cause of an airbag light with code B1001. Replacing the module will fix the root cause, but you will need a diagnostic tool to perform the ‘Setup SDM Primary Key in BCM’ procedure to turn off the light after installation.
Is this a new or used part?
This is a high-quality, fully tested OEM-standard part, backed by our one-year warranty, ensuring reliable performance and longevity.
What tools do I need for installation?
You’ll typically only need a basic socket set or nut driver to remove the mounting hardware and a flathead screwdriver to help release connector tabs. A capable scan tool is recommended for any necessary post-installation procedures.
Is there a core charge for my old part?
No, there is no core charge. You can keep or dispose of your old module without the hassle of returning it.