Restore Your Van’s Electrical Functions and Reliability
If you’re dealing with bizarre electrical problems in your 2003-2007 Chevrolet Express 2500 or other GM vehicle—like lights that flicker, power windows that have a mind of their own, or a security light that won’t turn off—a failing Body Control Module (BCM) is the likely culprit. The BCM is the nerve center for your vehicle’s body electronics, and when it goes bad, it can make your reliable workhorse feel haunted. This replacement BCM is your direct, hassle-free solution to restore order and get your vehicle operating as it should.
We take the guesswork and dealership expense out of the equation. Before we ship this module, our technicians will program it with the latest GM software updates specifically for your vehicle using the VIN you provide. This means it arrives ready for installation, saving you from costly programming fees and vehicle downtime. This is the most efficient way to solve those frustrating electrical gremlins for good.
A Technician’s Notebook: The Case of the Intermittent No-Start
I once had a 2006 Express 2500 work van come into my bay that was causing its owner, a local contractor, to lose money. The van would randomly refuse to start, but only sometimes. The battery was good, the starter was fine, but the security light would flash. After checking the basics, I hooked up my professional scan tool and saw communication loss codes with the BCM. After a quick inspection, I found no signs of water damage, which is a common killer of these modules. It was simply an internal electronic failure from years of heat cycles and vibration. We swapped in a VIN-programmed BCM just like this one, and the problem was solved instantly. The owner was back on the job the same afternoon, without the headache of leaving his van at a dealership for days.
Is Your GM Vehicle Showing These Symptoms?
- ✔ Erratic or non-functional interior and exterior lights.
- ✔ Power windows, door locks, or mirrors working intermittently or not at all.
- ✔ The security or anti-theft system light stays on, preventing the engine from starting.
- ✔ Gauges on the instrument cluster behaving erratically or not working.
- ✔ Communication error codes (like U-series codes) when scanned with a diagnostic tool.
- ✔ Unexplained battery drain when the vehicle is off.
Your Straightforward BCM Installation Guide
For the Chevy Express and GMC Savana vans, the BCM is typically located in the center of the dash. For Silverado and Sierra pickups, it’s usually found under the steering column. The process is designed to be simple for a DIYer with basic tools.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait about 10 minutes to ensure all systems are powered down.
- Access the Module: Carefully remove the necessary dash panels or lower steering column cover to expose the old BCM.
- Disconnect and Remove: Unplug the electrical connectors from the old module. They have locking tabs, so be gentle. Once disconnected, unbolt or unclip the BCM from its mounting bracket.
- Install the New BCM: Mount your new, pre-programmed BCM in the same location and securely reconnect all the electrical connectors. You should hear a ‘click’ as they lock in place.
- Reconnect and Test: Reassemble the dash panels and reconnect the negative battery terminal. Turn the key to the ‘On’ position (without starting) and test your lights, locks, and windows to ensure proper function.
Important Post-Installation Information
While this module is programmed for your VIN, some vehicle systems may require a ‘handshake’ with the new BCM. Don’t be alarmed if you see a warning light. These are simple procedures for any professional shop:
- Airbag System Sync: If the airbag 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 professional-grade scan tool.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor relearn might be required to ensure brake lights and stability control work correctly.
Disclaimer: Procedures can vary. Always consult a factory service manual or a qualified technician for guidance specific to your vehicle.
Guaranteed Fitment for Your GM Vehicle
This BCM is a direct replacement for part numbers 15167329, 15194169, 15747545, 15136224, 15116065, 15198115, 15136876, and 10367689, and fits the following models:
- Chevrolet Express 1500/2500/3500 Van (2003-2007) – Center dash location
- GMC Savana 1500/2500/3500 Van (2003-2007) – Center dash location
- Chevrolet Silverado 1500/2500/3500 Pickup (2003-2007 Classic) – Under steering column, exc. Crew Cab
- GMC Sierra 1500/2500/3500 Pickup (2003-2007 Classic) – Under steering column, exc. Crew Cab
- Chevrolet SSR (2003-2006)
Frequently Asked Questions
Do I need to get this BCM programmed by a dealer?
No. We handle the programming for you before shipping. Just provide your vehicle’s VIN at checkout, and it will arrive ready to install with the latest GM software.
What is a BCM and what does it do?
The Body Control Module (BCM) is a computer that manages many of your vehicle’s non-engine related functions, such as power windows, door locks, interior/exterior lighting, security system, and wipers.
Is there a core charge or do I need to send my old part back?
No, there is no core charge. You can keep your original module, which saves you the time and expense of a return shipment.
What if the airbag light comes on after I install it?
This can happen occasionally. It means the new BCM needs to be electronically introduced to the airbag system. A repair shop with a professional scan tool can perform the ‘Setup SDM Primary Key in BCM’ procedure to resolve this.
Where is the BCM located on my 2005 Express Van?
On the 2003-2007 Express and Savana vans, the BCM is located behind the dash panel in the center of the dashboard, often near the radio or climate controls.