Restore Full Functionality to Your GM Vehicle
Are you battling bizarre electrical issues in your Silverado, Sierra, Express, or Savana? Flickering interior lights, power windows with a mind of their own, or a security light that won’t turn off are classic signs of a failing Body Control Module (BCM). As the central hub for your vehicle’s body electronics, a faulty BCM can cause a cascade of frustrating and seemingly unrelated problems. I’ve seen it countless times in my 20+ years of diagnostics: a simple BCM failure making a perfectly good truck or van feel unreliable. This isn’t just an inconvenience; it can affect vehicle security and safety systems.
This is the definitive solution. We provide a high-quality replacement BCM that arrives at your doorstep fully programmed to your vehicle’s specific VIN. We install the latest GM-certified software, ensuring all systems communicate correctly right out of the box. This crucial step eliminates the need for an expensive trip to the dealership for programming, saving you time, money, and headaches. Simply provide your VIN during checkout, and we’ll handle the rest, delivering a part that’s ready for installation.
A Technician’s Notebook: The Water-Damaged BCM Case
A customer brought in a 2006 Sierra 2500 with a laundry list of complaints: the radio would turn off randomly, the driver’s side power lock was dead, and the dome light flickered constantly. A scan showed multiple communication loss codes (U-codes). Instead of chasing individual components, experience pointed me to the BCM under the steering column. Sure enough, we found tell-tale signs of water intrusion from a leaky windshield seal. The corrosion on the BCM’s circuit board was causing all the chaos. Replacing it with a properly programmed unit like this one solved every single issue instantly. It’s a common failure I’ve diagnosed on over 100 of these GMT800 platform trucks.
Is Your GM Truck or Van Showing These BCM Failure Signs?
A failing BCM can manifest in many ways. If you’re experiencing any of the following, this module is the likely solution for your 2003-2007 GM BCM issues:
- ✔ Erratic or non-functional power windows and door locks.
- ✔ Interior or exterior lights staying on or not turning on at all.
- ✔ The security or anti-theft system light is illuminated, potentially causing a no-start condition.
- ✔ Horn honking unexpectedly or not working when pressed.
- ✔ Dashboard gauges behaving erratically or not working.
- ✔ False warnings on the driver information center (DIC).
- ✔ Communication loss Diagnostic Trouble Codes (DTCs), such as U0140, U0155, or other U-codes.
Your Straightforward BCM Installation Guide
Installing your new BCM is a manageable job for a confident DIYer or a quick task for any professional mechanic. While the exact location varies between trucks and vans, the process is similar.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes before beginning work.
- Locate the BCM: On Silverado and Sierra pickups, the BCM is typically found under the driver’s side of the dashboard, near the steering column. On Express and Savana vans, it’s usually located behind the center dash trim.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the module from its mounting bracket.
- Install the New Module: Seat the new, pre-programmed BCM into the mounting bracket and securely plug in all the electrical connectors. You should hear a ‘click’ as they lock into place.
- Reconnect and Test: Reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all body functions: lights, locks, windows, horn, and radio to ensure everything is working correctly.
Important Post-Installation Steps
In some cases, your vehicle may require additional relearn procedures after the new 2003-2007 GM BCM is installed. This is normal and ensures all related safety systems are properly synced.
- Airbag System Sync: If the airbag warning light is on after installation, a ‘Setup SDM Primary Key in BCM’ procedure must be performed using a professional-grade scan tool. This syncs the new BCM with the airbag system’s Sensing and Diagnostic Module (SDM).
- Brake Pedal Position Relearn: Some models may require a brake pedal position sensor recalibration to ensure correct brake light operation and to satisfy the traction control system.
Verified Fitment for Your Vehicle
This module is a direct replacement for part number 15116065 and other interchangeable numbers. Please verify your vehicle is on this list before ordering.
Interchangeable Part Numbers: 15167329, 15194169, 15747545, 15136224, 15116065, 15198115, 15136876, 10367689
- 2003-2006 (exc. Crew Cab)
- 2007 Classic Style (creased door skin, exc. Crew Cab)
Chevrolet Express/GMC Savana Vans (1500, 2500, 3500):
- 2003 (All)
- 2004-2007 (w/o commercial tradesman package)
Chevrolet SSR:
- 2003-2006
Note: Fitment can depend on specific options like transmission type. Please consult the detailed fitment chart or contact us with your VIN if you are unsure.
Frequently Asked Questions
Why do I need to provide my VIN?
Your Vehicle Identification Number (VIN) is essential because it allows us to program the BCM with the exact software and vehicle-specific options your truck or van was built with. This ensures a seamless, plug-and-play installation without needing a trip to the dealer.
Is this part difficult to install myself?
For someone with basic mechanical skills, this is a very manageable task. The main challenge is accessing the module, which is typically under the dash. No special tools are needed for the physical swap, but be aware that some vehicles may require a post-installation relearn procedure with a scan tool.
What happens if my airbag light is on after installation?
This is a known possibility. It means the new BCM needs to be electronically introduced to the airbag module (SDM). A mechanic with a bi-directional scan tool can perform the ‘Setup SDM Primary Key in BCM’ procedure in a few minutes to resolve this.
Will this fix other warning lights, like ‘Service 4WD’?
In many cases, yes. The BCM communicates with dozens of other modules, including the transfer case control module (TCCM). A faulty BCM can disrupt this communication and trigger other system warnings. Fixing the BCM often resolves these related codes.
Do I need to send my old BCM back?
No. This product has no core charge. You can keep your original module, which can be helpful for comparison or as a backup if you’re troubleshooting.