Tired of Chasing Electrical Gremlins in Your GM Van or Truck?
If your 2004-2007 Chevrolet Express 1500 Van is acting possessed—with flickering lights, a dead HVAC system, or power locks with a mind of their own—the Body Control Module (BCM) is the likely culprit. As the central command for your vehicle’s comfort and security features, a failing BCM can cause a cascade of frustrating, seemingly unrelated problems. This replacement BCM, part number 15116066, is the definitive solution. We pre-program it to your vehicle’s specific VIN, ensuring it works perfectly right out of the box, with no expensive dealership trips required for programming. Restore order and reliability to your vehicle’s electronics today.
Case Study: A Tricky Diagnosis
A customer brought in a 2006 Sierra with a classic complaint: the radio and power windows would quit intermittently, and the security light was on, causing a no-start condition. They had already replaced the battery and checked fuses. After hooking up my scanner, I saw a handful of U-codes, indicating a loss of communication. In my shop, I’ve learned that on these GMT800 platforms, the BCM is a common point of failure due to internal solder joint cracks. Instead of a costly diagnostic chase, we installed a VIN-programmed BCM. The communication faults cleared, all accessories started working reliably, and the truck started every time. This single part solved four different problems and saved the customer hours of labor.
Is Your Vehicle Showing These Symptoms?
A failing BCM can manifest in many ways. If you’re experiencing any of the following, it’s time to consider a replacement. This is especially true if you see diagnostic trouble codes (DTCs) like B1001 or various communication errors.
- ✔ The air conditioning or heater blower only works on some speeds, or not at all.
- ✔ Power windows, door locks, or interior lights operate erratically or have stopped working.
- ✔ The anti-theft system malfunctions, preventing the engine from starting.
- ✔ The airbag warning light stays illuminated on the dashboard.
- ✔ Wipers behave unpredictably or won’t turn off.
- ✔ You’re getting multiple communication-related DTCs that point to a network issue.
Plug-and-Play Installation: Get Back on the Road Fast
Installing your new 2004-2007 Express 1500 BCM is a straightforward process that most DIYers can complete in under 15 minutes. Because it arrives pre-programmed to your VIN, you can skip the dealership entirely.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before beginning work. This prevents electrical shorts and helps reset the vehicle’s systems.
- Locate the BCM: On Express and Savana vans, the BCM is typically found in the center of the dash. On most trucks and SUVs, it’s located under the driver’s side dash, near the steering column.
- Swap the Module: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that need to be depressed. Remove any retaining screws or clips holding the old module and set it aside.
- Install the New BCM: Position the new module and plug in the connectors until they click securely into place. Reinstall any mounting hardware.
- Reconnect and Test: Reconnect the negative battery terminal. Start the vehicle and test all functions: lights, locks, windows, HVAC, and wipers to confirm the repair.
Post-Installation Note: In some cases, special procedures may be needed. If the airbag light is on, a professional scan tool is required to perform the ‘Setup SDM Primary Key in BCM’ function. Similarly, a ‘Brake Pedal Position Relearn’ may be necessary on certain models. And best of all, there is no core charge—you can keep your old part.
Verified Vehicle Compatibility
This module, part number 15116066, is a direct replacement for a wide range of General Motors vehicles and interchanges with part numbers 10383536, 15136225, 15198116, and others. It is guaranteed to fit the following models, among others:
GMC: Sierra, Yukon, Yukon XL, Savana Van (2002-2007)
Cadillac: Escalade, ESV, EXT (2003-2006)
Hummer: H2 (2003-2007)
Specifically for the 2004-2007 Express 1500 BCM, this fits models with the commercial tradesman package (RPO code PRP) and is located in the center dash.
Frequently Asked Questions
Does this BCM really not require dealer programming?
That’s correct. We professionally program the module to the VIN you provide during checkout. This ensures it communicates perfectly with your vehicle’s other systems right after installation, saving you time and money.
What is a BCM and what does it do?
The Body Control Module (BCM) is a computer in your vehicle that controls and monitors a wide range of non-engine-related functions. This includes power windows, locks, the security system, interior and exterior lighting, wipers, and the HVAC system.
Where is the BCM located on my 2005 Express Van?
On the 2004-2007 Chevrolet Express and GMC Savana vans, the BCM is typically located behind the center dash panel, often near the radio or HVAC controls.
Do I need to send my old part back (core charge)?
No. We do not require a core return for this part. You can keep your old module, which simplifies the process for you.
What if my airbag light comes on after I install it?
This is a known possibility. It means the new BCM needs to be electronically ‘introduced’ to the airbag system’s Sensing and Diagnostic Module (SDM). This procedure, called ‘Setup SDM Primary Key in BCM’, must be done with a professional-grade scan tool but is a quick process for any competent repair shop.