If you’re pulling your hair out over bizarre electrical issues in your GM truck or van, you’ve come to the right place. I’m talking about power windows with a mind of their own, dash lights flickering like a disco, or a security system that randomly prevents your truck from starting. After two decades in the garage, I can tell you that nine times out of ten, the Body Control Module (BCM) is the culprit. It’s the central computer for all your vehicle’s comfort and convenience features, and when it fails, it creates chaos.
Forget the expensive trip to the dealership and their high programming fees. This isn’t just a replacement part; it’s a complete solution. We take a reliable BCM, part number 15136224, and flash it with the very latest official GM software, specifically matched to your vehicle’s VIN. This means it arrives at your door ready for a straightforward installation, restoring function and peace of mind without the typical dealership hassle. This is the professional-grade fix you need to get your truck or van operating correctly again.
From the Diagnostic Bay: The Ghost in the Sierra
A customer brought in his 2006 Sierra 2500, convinced it was haunted. The dome light would stay on, the radio would shut off randomly, and the power door locks would cycle while driving. He’d already replaced the battery and checked grounds. We scanned it and found a slew of communication (U-code) errors pointing everywhere and nowhere. This is a classic BCM failure. The internal circuits start to break down, sending garbled messages across the data bus. We installed a VIN-programmed BCM, and every single issue vanished instantly. This is the kind of fix that turns a frustrating problem into a satisfying repair.
Is Your Truck or Van Showing These Symptoms?
A failing BCM can manifest in numerous ways. If you’re experiencing any of the following, this module is likely the solution you need:
- ✔ Intermittent or non-working power windows, door locks, or mirrors.
- ✔ Erratic interior or exterior lighting (headlights, dome lights, dash lights).
- ✔ Horn sounding off unexpectedly or not working at all.
- ✔ “Service Theft System” or other security-related warnings on the dash.
- ✔ Communication DTCs (Diagnostic Trouble Codes), often U-codes like U0140, U0155, or U0164.
- ✔ Wipers activating on their own or not functioning correctly.
- ✔ Radio or climate control systems behaving erratically.
A Straightforward Guide to Installation
Installing your new Programmed GM BCM is a manageable job for a confident DIYer or any professional mechanic. Since we handle the programming, you can skip the most complicated step.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on any electronic components.
- Locate the BCM: On most Silverado and Sierra pickups, it’s under the driver’s side of the steering column. For Express and Savana vans, it’s typically found behind the center dash panel.
- Remove Connectors: Carefully unplug the wiring harnesses from the old BCM. The connectors have locking tabs; be gentle to avoid breaking them.
- Swap the Module: Unbolt or unclip the old BCM and remove it. Mount the new module securely in its place.
- Reconnect Everything: Plug the wiring harnesses firmly into the new BCM. You’ll hear a click as they lock in. Reconnect the negative battery terminal.
- Perform Relearns (If Needed): Start the vehicle. In some cases, you may need to perform the additional procedures noted below, such as for the airbag system or brake pedal position sensor.
Important Post-Installation Information
While our programming handles the heavy lifting, some vehicle systems may require a ‘handshake’ with the new BCM. This is normal. No core charge is required; you can keep your old part.
- ✔ Airbag System Sync: If your airbag warning light is on after installation, a shop with a capable scan tool will need to perform the “Setup SDM Primary Key in BCM” procedure. This syncs the airbag module to the new BCM.
- ✔ Brake Pedal Position Relearn: On some models, a brake pedal position sensor relearn may be necessary to ensure brake lights and stability control function as intended.
Disclaimer: Vehicle systems vary. Always have a factory service manual available for your specific model, or consult with a qualified technician if you are unsure about any step.
Will This Fit My GM Vehicle?
This module is a direct replacement for part number 15136224 and interchanges with several other part numbers, including 15167329, 15194169, 15747545, 15116065, 15198115, 15136876, and 10367689. It is verified to fit the following vehicles (please check options carefully):
- Chevrolet Silverado 1500/2500/3500 & GMC Sierra 1500/2500/3500 (2003-2007 Classic): Fits models (excluding Crew Cab) where the BCM is located under the steering column. Please verify your specific options for transmission and model year.
- Chevrolet Express 1500/2500/3500 & GMC Savana 1500/2500/3500 (2003-2007): Fits models where the BCM is in the center dash. Excludes models with the commercial tradesman package from 2004-2007.
- Chevrolet SSR (2003-2006): Direct fit for all models.
Frequently Asked Questions
How does the VIN programming work?
After you place your order, you’ll need to provide us with your 17-digit Vehicle Identification Number (VIN). Our technicians use this to load the exact, most current GM-certified software for your vehicle’s specific configuration onto the BCM before we ship it.
Do I need to send my old BCM back?
No. There is absolutely no core charge for this part. You can keep your original module, which is helpful if you ever want to double-check the part number.
Is this a difficult part to install myself?
For someone with basic mechanical skills, it’s a very manageable job. The main challenge is typically accessing the module’s location. Since the programming is done for you, it’s a plug-and-play process, though some minor electronic relearn procedures might be needed as noted.
What if the airbag light comes on after I install it?
This is a known possibility. The new BCM and the airbag system (SDM) need to be electronically introduced. A repair shop with a professional-grade scan tool can perform the ‘Setup SDM Primary Key in BCM’ procedure in a few minutes to resolve this.
Will this fix my ‘Service Theft System’ light?
In many cases, yes. The BCM is a critical part of the Passlock/Passkey vehicle anti-theft system. A failing BCM is a very common cause of these warnings and no-start conditions. Our VIN programming ensures the security data is correct for your vehicle.