Tired of Electrical Gremlins in Your GM Van or Truck?
If you’re dealing with bizarre electrical issues in your 2003-2007 Savana 2500 Van—like power locks with a mind of their own, interior lights that won’t turn off, or a security system that prevents your workhorse from starting—you’ve likely met the frustrating reality of a failing Body Control Module (BCM). This isn’t just an annoyance; it’s a critical component failure that can sideline your vehicle. As the central hub for your vehicle’s body electronics, a faulty BCM can cause a cascade of confusing and unpredictable problems. We offer a reliable, straightforward solution: a replacement BCM, programmed specifically to your vehicle’s VIN before it even leaves our facility.
Key Signs of a Failing Body Control Module
A failing BCM often sends out a variety of warning signs. From my two decades of experience under the hood, these are the symptoms I see most often. If your vehicle is showing any of these, a faulty BCM is a very likely culprit:
- ✔ Erratic or non-functional power windows, door locks, and mirrors.
- ✔ Interior dome lights or dashboard lights staying on, draining your battery.
- ✔ The security or anti-theft light flashing, causing a no-start condition.
- ✔ Horn honking unexpectedly or not working at all.
- ✔ Inconsistent operation of windshield wipers.
- ✔ Communication error codes, such as U0140, stored in other modules.
From the Diagnostic Bay: The Case of the Haunted Work Van
A contractor brought his ’06 Savana 2500 into my shop, completely fed up. He said every morning was a gamble. Some days the van started fine, other days the security light would flash and it was dead in the water. His dome light would flicker while driving, and his power locks only worked when they felt like it. He’d already replaced the battery twice. After confirming solid power and ground at the BCM connectors, we knew where the problem was. The original module was failing internally. We installed one of our VIN-programmed BCMs, and it was like flipping a switch. Every function returned to normal, instantly. He was back on the job site the same day, without a costly and time-consuming trip to the dealership. That’s the peace of mind this part provides.
The Simple, Dealer-Free BCM Replacement Process
We take the biggest headache out of replacing a BCM: the programming. Dealerships can charge hundreds for this service alone. We handle it for you. Simply provide us with your vehicle’s VIN during checkout, and our technicians will flash this module with the latest GM software specific to your vehicle’s options and configuration. It arrives at your door ready for a direct-fit installation, making this a job you can confidently tackle in your own garage.
Your Straightforward Installation Guide
- ✔ Safety First: Disconnect the negative terminal from your vehicle’s battery and wait about 10 minutes to ensure all systems are powered down.
- ✔ Locate the BCM: On Savana and Express vans, the BCM is typically located in the center of the dashboard, often behind the radio or climate control panel. For Silverado and Sierra pickups, it’s usually found under the driver’s side of the dashboard near the steering column.
- ✔ Disconnect and Remove: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that need to be depressed. Once disconnected, remove any bolts or clips holding the module in place and take it out.
- ✔ Install the New Module: Mount your new, pre-programmed BCM in the same location and securely plug in all the electrical connectors. You’ll hear a click as they lock into place.
- ✔ Power Up: Reconnect the negative battery terminal. Turn the key to the ‘ON’ position (without starting the engine) and test your electronic functions like lights, locks, and windows.
Important Post-Installation Notes
While this 2003-2007 Savana 2500 BCM is designed for a simple swap, some vehicles may require a ‘relearn’ or ‘sync’ procedure for specific systems. This is normal. Two common ones are:
- Airbag System Sync: If your airbag warning light is on after installation, a ‘Setup SDM Primary Key in BCM’ procedure is needed. This syncs the new BCM with the airbag system and requires a bi-directional scan tool.
- Brake Pedal Position (BPP) Relearn: On some models, a BPP sensor relearn may be necessary to ensure brake lights and stability control systems function correctly.
Disclaimer: Vehicle systems vary. For detailed procedures specific to your model, always consult a factory service manual or a certified automotive technician.
Will This Fit My Vehicle?
This module is a direct replacement for part number 15136876 and is also compatible with part numbers 15167329, 15194169, 15747545, 15136224, 15116065, 15198115, and 10367689. It fits a wide range of GM trucks and vans, including:
- GMC Savana / Chevrolet Express 1500, 2500, 3500 Vans (2003-2007)
- GMC Sierra / Chevrolet Silverado 1500, 2500, 3500 Pickups (2003-2007 Classic)
- Chevrolet SSR (2003-2006)
Please use the detailed fitment list on this page to confirm compatibility with your exact year, model, and options.
Frequently Asked Questions
Do I need to send my old BCM back?
No. We do not require a core return for this part. You can keep your original module, which saves you the time and expense of a core charge and return shipping.
How do I provide my VIN for programming?
After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). We cannot ship your order until we receive your VIN, as the programming is essential for the part to function correctly in your vehicle.
Is this a difficult part to install myself?
For someone with basic mechanical skills, the physical installation is straightforward. The main challenge with BCM replacement is typically the programming, which we handle for you. The most common location is behind the dash, which requires some trim removal.
What if my airbag light comes on after I install it?
This can happen on certain models. It means the new BCM needs to be electronically synced with the airbag module (SDM). This procedure, called ‘Setup SDM Primary Key in BCM’, requires a professional-grade scan tool and can be performed by most automotive repair shops.
Will this fix my ‘Service 4WD’ light?
While the BCM communicates with many systems, a ‘Service 4WD’ message is more commonly related to the Transfer Case Control Module (TCCM), encoder motor, or dash switch. You should diagnose that system specifically before replacing the BCM for that issue.