If you’re dealing with bizarre electrical issues in your GM truck or van, you’ve come to the right place. As a technician with over two decades of experience, I’ve seen firsthand how a failing Body Control Module (BCM) can turn a reliable workhorse into a source of constant frustration. One minute your turn signals work, the next they don’t. Your radio might shut off randomly, or worse, your truck won’t start at all due to a security system fault. This isn’t just an annoyance; it’s a reliability and safety problem.
This is the definitive, hassle-free solution. We are offering a direct-fit GM BCM replacement, part number 15136224 (and its interchanges), for a wide range of 2003-2007 GM vehicles. The best part? It arrives at your door fully programmed to your vehicle’s specific VIN. Just provide us with your VIN at checkout, and we’ll handle the complex part, loading the latest GM-certified software onto the module. This means no expensive trips to the dealership for programming, saving you hundreds of dollars and significant downtime.
Is Your GM Truck or Van Showing These Symptoms?
- ✔ Erratic or non-functional interior and exterior lights (headlights, dome lights, turn signals).
- ✔ Power windows, door locks, or mirrors operating intermittently or not at all.
- ✔ The security or anti-theft system light is on, preventing the engine from starting.
- ✔ The radio or instrument cluster randomly loses power or behaves erratically.
- ✔ False warning messages appearing on the driver information center (DIC).
- ✔ Communication loss diagnostic trouble codes (DTCs), such as U-codes, stored in other modules.
- ✔ Inconsistent A/C and heater blower fan operation.
A Technician’s Notebook: The Silverado with a Mind of Its Own
A 2005 Silverado 1500 came into my bay with a laundry list of complaints that seemed unrelated. The owner said the power locks would cycle while driving, the radio would die, and sometimes the dome light wouldn’t turn off, draining the battery. He’d already replaced the battery and checked fuses. My initial scan showed a dozen communication codes across different modules. This is a classic sign that the central hub—the BCM—is failing. Instead of shotgunning parts, we focused on the BCM. After confirming power and ground were good at the module, we knew the internal logic board was the culprit. A pre-programmed GM BCM replacement like this one solved every single issue in one go, saving the customer from a costly and frustrating diagnostic goose chase.
Your Straightforward BCM Installation Guide
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes before starting work.
- ✔ Locate the BCM: On most Silverado and Sierra pickups, the BCM is located under the driver’s side of the dashboard, near the steering column. For Express and Savana vans, it’s typically found behind the center dash trim.
- ✔ Remove the Old Module: Carefully unplug the electrical connectors. They have locking tabs that need to be depressed. Once unplugged, unbolt or unclip the module from its mounting bracket.
- ✔ Install the New Module: Seat your 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, radio, etc.—to confirm proper operation.
Important Post-Installation Information
Because this module is central to your vehicle’s electronics, a couple of simple relearn procedures may be necessary after installation. This is normal. If your airbag light is on, a shop with a capable scan tool will need to perform the “Setup SDM Primary Key in BCM” procedure. In some cases, a “Brake Pedal Position Relearn” may also be required for proper brake light and stability control function. Don’t worry, there is no core charge, so you can keep your original module.
Verified Fitment for Your GM Vehicle
This module is a direct replacement for part numbers 15167329, 15194169, 15747545, 15136224, 15116065, 15198115, 15136876, and 10367689. It is guaranteed to fit a wide range of vehicles, including many non-Crew Cab Silverado and Sierra models from 2003-2007 (including ‘Classic’ styles), Express and Savana vans from 2003-2007, and the Chevy SSR from 2003-2006. Please refer to the detailed fitment list to confirm compatibility with your specific year, model, and options.
Frequently Asked Questions
Do I need to do any programming myself?
No. This BCM comes fully programmed to your vehicle’s VIN before it ships. It is ready to install right out of the box, eliminating the need for expensive dealership tools or programming services.
Is there a core charge for my old BCM?
Absolutely not. There is no core charge. You can keep your old part, so there’s nothing you need to send back to us.
What tools are needed for the installation?
Basic hand tools are all that’s required for the physical swap. Typically, you’ll need a socket set to disconnect the battery and remove the BCM mounting bolts, and possibly a trim removal tool for van models. No special electronic tools are needed for the basic installation.
My airbag light is on after installing the new BCM. What do I do?
This is a known possibility. The new BCM needs to be electronically ‘introduced’ to the airbag system’s Sensing and Diagnostic Module (SDM). A professional technician with a bi-directional scan tool can perform the “Setup SDM Primary Key in BCM” procedure to sync the modules and turn off the light.
Will this fix my ‘Service 4WD’ message?
While a faulty BCM can cause a variety of issues, a ‘Service 4WD’ message is more commonly related to the Transfer Case Control Module (TCCM), the encoder motor, or the dash switch. It’s best to have the vehicle scanned for specific trouble codes to pinpoint the exact cause before ordering.