Restore Control and End Electrical Frustration in Your GM Truck
Are you tired of chasing electrical gremlins in your Silverado, Sierra, or Express van? One moment the power windows work, the next they don’t. The security light flashes for no reason, or your interior lights have a mind of their own. As a technician with over two decades of experience, I’ve seen these exact issues hundreds of times. The culprit is almost always a failing Body Control Module (BCM), the central command center for your vehicle’s body electronics.
This isn’t just an inconvenience; a faulty BCM can affect everything from your door locks and lighting to communication between other critical modules. Instead of spending a fortune at the dealership for diagnostics and programming, we offer a simple, reliable solution. This replacement Body Control Module, part number 15136224, arrives at your door programmed to your vehicle’s specific VIN with the latest GM software. It’s the most direct path to getting your truck back to 100% functionality.
Common Signs of a Failing BCM
If you’re experiencing any of these symptoms, a failing BCM is the likely cause. In my shop, a bad BCM is a common diagnosis for vehicles exhibiting multiple, seemingly unrelated electrical faults, often accompanied by communication DTCs like U0140.
- ✔ Power windows, locks, or mirrors working intermittently or not at all.
- ✔ Interior dome lights or dashboard lights flickering or staying on.
- ✔ The security or anti-theft system light is illuminated, potentially causing a no-start condition.
- ✔ Horn sounding unexpectedly or not working when pressed.
- ✔ Erratic behavior from the radio or instrument cluster gauges.
- ✔ False warnings on the driver information center (DIC).
- ✔ Diagnostic trouble codes (DTCs) related to lost communication with the BCM.
From the Diagnostic Bay
I remember a 2006 Silverado 2500 that came into the shop with a laundry list of complaints. The owner said his power locks would cycle while driving, the radio would shut off randomly, and his battery was draining overnight. He had already replaced the battery and alternator to no avail. After hooking up the scan tool, I found a dozen communication codes pointing to the BCM. Instead of a complex wiring issue, the BCM itself was failing internally, causing network chaos. We installed a VIN-programmed BCM just like this one, and within an hour, every single issue was resolved. It’s a classic case where one part can solve a multitude of problems.
Your Straightforward BCM Installation Guide
Replacing the 2003-2007 Sierra BCM is a manageable job for a DIYer with basic tools. Since we handle the programming, you can skip the expensive trip to the dealer. For most trucks, the BCM is located under the driver’s side of the dashboard, near the steering column. For vans, it’s often behind the center dash panel.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes before beginning.
- Locate the BCM: Remove any necessary trim panels to access the module. It’s typically a black plastic box with several large multi-pin connectors.
- Disconnect and Remove: Carefully unplug all electrical connectors. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the old BCM from its mounting bracket.
- Install the New Module: Mount your new, pre-programmed BCM in the same location. Securely plug in all the electrical connectors, ensuring each one clicks into place.
- Reconnect and Test: Reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all body functions: windows, locks, lights, horn, and radio.
- Perform Relearns (If Needed): In some cases, you may need to perform a post-install procedure. If the airbag light is on, a professional scan tool is needed to sync the SDM. A brake pedal position relearn may also be required for proper brake light function.
Will This Fit My Truck or Van?
This BCM is a direct replacement for a wide range of GM vehicles and interchanges with several part numbers. Please verify your vehicle is on this list. This module is compatible with part numbers: 15167329, 15194169, 15747545, 15136224, 15116065, 15198115, 15136876, 10367689.
Fitment includes, but is not limited to:
- Chevrolet Silverado 1500/2500/3500 (2003-2007 Classic): Body Control (BCM); under steering column, excluding Crew Cab models. Check specific options for 2006-2007.
- GMC Sierra 1500/2500/3500 (2003-2007 Classic): Body Control (BCM); under steering column, excluding Crew Cab models. This is the correct 2003-2007 Sierra BCM for non-crew cab configurations.
- Chevrolet Express 1500/2500/3500 Van (2003-2007): Body Control (BCM); located in the center dash, excluding commercial tradesman package for 04-07.
- GMC Savana 1500/2500/3500 Van (2003-2007): Body Control (BCM); located in the center dash, excluding commercial tradesman package for 04-07.
- Chevrolet SSR (2003-2006): Body Control (BCM).
Note: Always confirm your vehicle’s specific options (e.g., transmission type, cab style) against the fitment list. If you’re unsure, just send us your VIN!
Frequently Asked Questions
Do I need to do any programming myself?
No. We program the BCM with the latest GM software using the VIN you provide during checkout. It arrives ready for installation, saving you a trip to the dealership.
What is a core charge?
There is no core charge for this part. You can keep your old, faulty BCM without needing to send it back to us.
My airbag light is on after installation. What should I do?
This is a normal possibility. The new BCM needs to be electronically ‘introduced’ to the airbag system’s computer (SDM). A professional mechanic with a capable scan tool will need to perform the ‘Setup SDM Primary Key in BCM’ procedure to resolve this.
Is this a difficult part to install for a DIYer?
For most DIYers with basic tools, this is a straightforward job. The main challenge is accessing the module under the dashboard. Since there’s no programming required on your end, it’s mostly a plug-and-play process.
What information do you need from me?
After you place your order, we will need your vehicle’s 17-digit VIN (Vehicle Identification Number) to ensure we load the correct software and vehicle options into your new BCM.
Will this fix my ‘Service 4WD’ message?
While a BCM can cause a wide range of issues, a ‘Service 4WD’ message is more commonly related to the Transfer Case Control Module (TCCM) or the encoder motor/sensor. It’s best to have the codes scanned to pinpoint the exact cause.