Restore Full Functionality to Your 2004-2007 Chevrolet Express 1500 Van
If your work van is plagued by bizarre electrical problems—from flickering lights and a dead A/C blower to malfunctioning power locks—you’re likely dealing with a failing Body Control Module (BCM). As a technician with over two decades of experience, I’ve seen how a faulty BCM can sideline a perfectly good vehicle, causing endless frustration and diagnostic headaches. This module, part number 15116066, is the central command for your van’s body electronics. When it fails, it can create a cascade of seemingly unrelated issues that are impossible to ignore.
We offer a straightforward solution. This BCM is prepared for your specific vehicle through our professional Cloning Service. This means we transfer the critical data from your original module to this replacement unit. The result is a true plug-and-play part that requires no expensive dealership visits for programming. It arrives ready to install, restoring the reliable operation you depend on for your business or personal use. Get your Express van back to work without the hassle.
From the Diagnostic Bay: Chasing Electrical Gremlins
I once had a 2006 Express van come into the shop where the owner had already replaced the blower motor and resistor three times, convinced they were faulty. The A/C would work one day and quit the next. A scan showed no HVAC codes, but there was a B1001 (Option Configuration Error) in the BCM. After checking the wiring and grounds, we found the BCM itself was failing intermittently, cutting power to the HVAC control head. Installing a correctly programmed 2004-2007 Express 1500 BCM solved the issue permanently. It’s a classic example of how a central module failure can send you chasing phantom problems in other systems.
Is Your Express Van Showing These Electrical Faults?
- ✔ The security system acts up, causing a no-start condition or randomly sounding the alarm.
- ✔ Power windows, door locks, or interior lights work intermittently or not at all.
- ✔ Your HVAC system is unresponsive, or the blower motor won’t turn on.
- ✔ The airbag warning light is illuminated, often with a DTC like B1001 stored in the system.
- ✔ You’re experiencing strange grounding issues or a host of communication codes (U-codes).
- ✔ Wipers or exterior lights behave erratically, creating a safety concern.
A Straightforward Guide to BCM Installation
Installing your replacement BCM is a simple process that can be done with basic hand tools. For the Chevrolet Express and GMC Savana, the module is typically located behind the center dash panel.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work. This prevents short circuits and helps reset the vehicle’s electronic systems.
- Locate the BCM: On Express and Savana vans, you’ll find the BCM in the center dash area. You may need to remove a trim panel to access it. It’s a black plastic box with several large electrical connectors.
- Swap the Modules: Carefully unplug the wiring harnesses from your old BCM. The connectors have locking tabs that need to be depressed. Once unplugged, remove the old module and set the new one in its place.
- Reconnect Everything: Firmly plug the wiring harnesses into your new BCM. You should hear a click as they lock into place. Reconnect your vehicle’s battery.
- Post-Install Checks: Start the vehicle and test all body functions: lights, locks, windows, wipers, and HVAC. If an airbag light appears, a professional scan tool is needed for the ‘Setup SDM Primary Key’ procedure. A brake pedal position relearn may also be required on some models.
Confirmed Fitment for Your GM Vehicle
This Body Control Module is a direct-fit replacement for a wide range of GM trucks and vans. It is interchangeable with part numbers 10383536, 15136225, 15136877, 15198116, and others. Please verify your part number or use the fitment list below to ensure compatibility.
EXPRESS 2500 VAN 04-07 Body Control (BCM); (center dash), w/commercial tradesman package (opt PRP)
EXPRESS 3500 VAN 04-07 Body Control (BCM); (center dash), w/commercial tradesman package (opt PRP)
SAVANA 1500 VAN 04-07 Body Control (BCM); (center dash), w/commercial tradesman package (opt PRP)
SAVANA 2500 VAN 04-07 Body Control (BCM); (center dash), w/commercial tradesman package (opt PRP)
SAVANA 3500 VAN 04-07 Body Control (BCM); (center dash), w/commercial tradesman package (opt PRP)
AVALANCHE 1500/2500 03-06 Body Control (BCM); (under steering column)
SILVERADO 1500/2500/3500 03-06 Body Control (BCM); (under steering column), Crew Cab
SIERRA 1500/2500/3500 03-06 Body Control (BCM); (under steering column), Crew Cab
TAHOE / YUKON / SUBURBAN / YUKON XL 03-06 Body Control (BCM); (under steering column)
ESCALADE / ESV / EXT 03-06 Body Control (BCM); (under steering column)
HUMMER H2 03-07 Body Control (BCM); (LH dash)
Frequently Asked Questions
Frequently Asked Questions
What is a ‘Cloning Service’ and why do I need it?
Cloning is a service where we transfer your vehicle’s specific configuration data, including the VIN and security information, from your original BCM to the replacement unit. This makes the new module a perfect electronic match for your van, ensuring it works immediately upon installation without requiring a trip to the dealer for expensive programming.
Do I need to send my old BCM to you?
Yes, for our cloning service, you will need to send us your original Body Control Module. We perform the data transfer in our facility and then ship both your original module and the ready-to-install replacement back to you. We do not keep your old part.
Will this fix my airbag light?
A faulty BCM can cause the airbag light to come on. Replacing it often resolves the issue. However, in some cases, a post-installation procedure called ‘Setup SDM Primary Key in BCM’ is required. This syncs the BCM with the airbag system and must be done with a professional-grade scan tool.
Is this a difficult part for a DIYer to replace?
Not at all. For most owners with basic tools, this is a very manageable job. The BCM is typically accessible behind a dash panel, and the replacement involves simply unplugging the old unit and plugging in the new one. Our cloning service eliminates the most difficult part—the programming.
What happens if I install it and something still doesn’t work?
First, double-check all connections. If functions are still inoperative, a post-installation relearn procedure (like for the brake pedal position sensor) may be needed. Always consult a factory service manual for vehicle-specific requirements or contact our expert support for guidance.