Restore Control Over Your Van’s Electronics
If you’re dealing with the frustrating and unpredictable electrical gremlins in your 2008-2012 Express 3500 Van, you know how disruptive it can be. Flickering lights, malfunctioning power windows or locks, and strange security system alerts are more than just an annoyance—they can take a work vehicle off the road. This Body Control Module (BCM) is the reliable, straightforward solution to restore order. It acts as the central hub for your vehicle’s body electronics, and a failing one is often the root cause of these baffling issues.
What sets our BCM apart is our commitment to a hassle-free installation. Before this module ever leaves our facility, we program it with the latest GM software, specifically matched to your van’s Vehicle Identification Number (VIN). This means you can bypass the expensive and time-consuming trip to a dealership for programming. You get a part that’s ready to install right out of the box, saving you time and hundreds of dollars in labor fees.
Case Study: A Tricky Diagnosis
I remember a 2011 Express 3500 that came into my shop with a laundry list of bizarre complaints. The driver said the dome lights would stay on, the radio would randomly shut off, and the power locks worked only half the time. He’d already replaced the battery and checked all the fuses. A scan showed a slew of communication error codes (U-codes), but nothing pointed to a single failed component. This is a classic sign of a BCM failure. The module itself was losing its ability to properly communicate and direct traffic on the vehicle’s data network. After installing a VIN-programmed BCM like this one, every single electrical issue was resolved. It’s a fix I’ve performed hundreds of times on these workhorses.
Is Your GM Vehicle Showing These BCM Failure Signs?
A faulty BCM can manifest in numerous ways. If you’re experiencing any of the following, a replacement is likely the solution. Look out for:
- ✔ Intermittent or non-functional power windows, door locks, or mirrors.
- ✔ Interior or exterior lights that flicker, stay on, or don’t turn on at all.
- ✔ Erratic or incorrect readings on the instrument cluster gauges.
- ✔ The anti-theft or security system light flashing, preventing the vehicle from starting.
- ✔ Diagnostic trouble codes (DTCs) related to lost communication, such as U0140, U0155, or U0100.
- ✔ Wipers behaving erratically or not parking in the correct position.
Your Straightforward BCM Installation Guide
Installing your new BCM is a manageable job for a DIYer or any professional technician. Follow these general steps for a successful replacement:
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes to ensure all systems are powered down.
- Locate the BCM: On most Express and Savana vans, the BCM is located in the center of the dashboard, often accessible by removing a lower dash panel or the glove box. For other GM models, it may be under the driver’s side dash or near the steering column.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that must be depressed to be removed. Once disconnected, unbolt or unclip the module from its mounting bracket.
- Install the New Module: 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 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, wipers, and radio—to ensure everything is working as expected.
Important Post-Installation Notes
While our programming handles the critical vehicle matching, some GM systems require a ‘handshake’ after a new BCM is installed. Be aware of these potential procedures:
- Airbag System Sync: If the airbag warning light is illuminated after installation, a ‘Setup SDM Primary Key in BCM’ procedure is needed. This requires a professional-grade scan tool to sync the airbag system with the new BCM.
- Brake Pedal Position Relearn: On certain models, a brake pedal position sensor relearn may be necessary to ensure correct brake light operation and traction control functionality.
- No Core Charge: You are not required to return your old module. There is no core charge associated with this purchase.
Verified Compatibility for a Wide Range of GM Models
This BCM is a direct replacement for part number 15880684 and interchanges with a wide variety of other GM part numbers. Please verify your vehicle is on this list:
Note: Specific options or engine sizes may apply. Always match your part number or consult the detailed fitment list if unsure.
Frequently Asked Questions
What is a BCM and what does it do?
The Body Control Module (BCM) is a computer in your vehicle that manages and controls electronic accessories not related to the engine, such as power windows, locks, lights, wipers, and the security system. It’s the brain for your vehicle’s comfort and convenience features.
Is this module truly ready to install out of the box?
Yes. We program the BCM using the VIN you provide during checkout. This ensures it has the correct software for your vehicle’s specific options, allowing for a direct installation without needing a trip to the dealer for programming.
How do I give you my VIN?
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 this information to program the module correctly.
Why is my airbag light on after installing the BCM?
This is a normal security measure on some GM vehicles. The new BCM needs to be electronically introduced to the airbag’s computer (SDM). This requires a ‘Setup SDM Primary Key’ procedure with a compatible high-level scan tool to turn off the light.
Do I have to send my old BCM back?
No. We do not require you to return your original part. There is no core charge, so you can keep or dispose of your old module.
Will this fix every electrical problem my van has?
This BCM will fix problems originating from a faulty module. While it is a very common point of failure, we always recommend a proper diagnosis to confirm the BCM is the cause before ordering. Check fuses, relays, and wiring first.