Is Your GM Truck or Van Acting Possessed?
As a technician with over two decades of experience, I’ve seen it all. Headlights flickering for no reason, power windows with a mind of their own, the security light flashing, or a vehicle that simply refuses to start. These aren’t just annoyances; they’re classic symptoms of a failing Body Control Module (BCM). The BCM is the central command for your vehicle’s body electronics, and when it starts to go, it can create a cascade of frustrating and hard-to-diagnose electrical gremlins. Don’t let a faulty module sideline your reliable workhorse.
This isn’t just a replacement part; it’s a complete solution. We take the guesswork and the expensive trip to the dealership out of the equation. Simply provide us with your vehicle’s VIN after purchase, and we will program this BCM with the latest GM-certified software specifically for your truck or van. It arrives at your door ready for installation, saving you hundreds in programming fees and vehicle downtime.
A Technician’s Notebook: The Silverado with a Ghost
Just last month, a 2006 Silverado 2500 was towed to my shop. The owner was at his wit’s end. The interior lights would stay on, the radio would cut out intermittently, and the horn would blare at random. He’d already replaced the battery and checked all the fuses. After a quick scan, I saw multiple communication errors pointing toward the BCM. Instead of a costly dealer visit, we ordered a pre-programmed module. An hour after it arrived, the truck was fixed. No more ghost, just a happy customer. This is the exact, hassle-free solution we offer you.
Is Your Truck or Van Showing These Symptoms?
- ✔ Erratic or non-functional power windows, locks, and mirrors.
- ✔ Interior dome lights or exterior lights flickering or staying on.
- ✔ The security system light is illuminated, preventing the engine from starting.
- ✔ Intermittent operation of the radio or instrument cluster gauges.
- ✔ False warning messages appearing on the driver information center.
- ✔ The horn sounding unexpectedly.
Your Straightforward BCM Installation Guide
Replacing the 2003-2007 GM BCM is a job most DIYers can handle with basic tools. Follow these steps for a successful installation.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait at least 10 minutes to allow capacitors to discharge.
- 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. On Express and Savana vans, it’s typically found behind the center dash panel.
- Remove Trim Panels: Carefully remove any plastic trim or panels necessary to access the module. Keep track of your screws and clips.
- Disconnect and Remove: Unplug the electrical connectors from the old BCM. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the old module from its mounting bracket.
- Install the New BCM: Mount your new, pre-programmed BCM onto the bracket and securely plug in all the electrical connectors. You should hear a ‘click’ as they lock into place.
- Reassemble and Reconnect: Reinstall any trim panels you removed and reconnect the negative battery terminal.
CRITICAL Post-Installation Steps
Your new BCM is programmed, but your vehicle’s other systems need to recognize it. These steps are not optional for proper and safe operation.
- Airbag System Reset: You will likely have an airbag warning light on. This is normal. You must perform the ‘Setup SDM Primary Key in BCM’ procedure using a bi-directional scan tool (like a Tech 2 or high-end professional scanner). This re-establishes communication between the airbag system and the new BCM.
- Brake Pedal Position Sensor Relearn: Some vehicles require a brake pedal position sensor recalibration after BCM replacement. This ensures your brake lights and stability control systems function correctly. This procedure also requires a capable diagnostic tool.
Note: If you are not equipped with a professional-grade scan tool, a local independent mechanic can typically perform these relearn procedures for you.
Will This Fit My GM Vehicle?
This module is a direct-fit replacement for a wide range of vehicles and is compatible with the following original equipment part numbers: 15167329, 15194169, 15747545, 15136224, 15116065, 15198115, 15136876, and 10367689. Please verify your part number before ordering. It fits the following models:
- Chevrolet Silverado 1500/2500/3500 (2003-2007, see fitment notes for specific cab/transmission exclusions)
- GMC Sierra 1500/2500/3500 (2003-2007, see fitment notes for specific cab/transmission exclusions)
- Chevrolet Express 1500/2500/3500 Van (2003-2007, see fitment notes for package exclusions)
- GMC Savana 1500/2500/3500 Van (2003-2007, see fitment notes for package exclusions)
- Chevrolet SSR (2003-2006)
This is the definitive fix for your 2003-2007 GM BCM issues. Order today and restore your vehicle’s electrical functions with confidence.
Frequently Asked Questions
Do I really need to provide my VIN?
Yes, providing your 17-digit VIN is absolutely essential. We use it to load the precise, vehicle-specific software and calibrations from GM’s database onto your new BCM. This ensures perfect compatibility and function right out of the box.
Is this part difficult to install myself?
For someone with basic mechanical skills, the physical replacement is straightforward. The main challenge is the post-installation electronic ‘relearn’ procedures for the airbag and brake systems, which require a professional-grade scan tool.
What happens if I don’t do the airbag (SDM) relearn?
The airbag warning light will remain on, and more importantly, the supplemental restraint system (airbags) may not function correctly in the event of a collision. This is a critical safety step that must be performed.
Will this fix my ‘Service 4WD’ message?
While a 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 diagnose that specific code before replacing the BCM for that issue alone.
Is this a new or used part?
This is a high-quality, inspected, and tested recycled OEM part that has been electronically restored and programmed with the latest software for your vehicle. It provides OEM function and reliability without the high dealer cost.