Fix Your Van’s Electrical Headaches for Good
If you’re a GMC Savana owner, you know that your van is the lifeblood of your business or your family’s go-to vehicle. When the Body Control Module (BCM) starts to fail, it can bring everything to a halt. Suddenly, the power windows won’t budge, the interior lights flicker like a horror movie, or worse, the security system prevents the engine from starting. This isn’t just an annoyance; it’s downtime that costs you money and peace of mind. This part, number 15116066, is the central command for your van’s body electronics, and when it fails, the symptoms can be baffling. That’s where we come in.
We offer a straightforward Cloning Service for your BCM. Instead of selling you a generic module that requires an expensive trip to the dealership for programming, we transfer the exact data from your original, failing unit to this replacement module. This means the new BCM is a perfect digital twin of your old one, retaining all your vehicle’s specific settings and security information for a true plug-and-play solution.
From the Diagnostic Bay
I once had a 2006 Savana 2500 work van towed to my shop with a no-start condition. The owner had already replaced the battery and starter, convinced it was a power issue. The dash lights would come on, but turning the key did nothing. After a quick scan, I saw a slew of communication and security-related DTCs. The culprit wasn’t the battery; it was a failing BCM causing a false security lockout. A cloned BCM had him back on the road and back to work the same afternoon, saving him from what would have been days of lost income waiting for a dealership appointment.
Is Your Work Van Showing These Electrical Gremlins?
A faulty BCM can manifest in numerous ways. Over my 20 years of diagnostics, these are the most common signs I’ve seen with a failing 2004-2007 Savana 2500 BCM. If you’re experiencing any of these, this module is your solution:
- ✔ Intermittent or non-functional power windows, door locks, or mirrors.
- ✔ HVAC blower motor or climate controls working erratically or not at all.
- ✔ The security light stays on, and the engine refuses to crank (no-start condition).
- ✔ Headlights, taillights, or interior dome lights acting possessed—flickering, staying on, or not turning on.
- ✔ The airbag warning light is illuminated, often with a DTC like B1001 (Setup SDM Primary Key in BCM).
- ✔ Your scan tool shows communication errors or various body-related trouble codes.
A Straightforward Guide to Installation
One of the best parts of our cloning service is how simple the physical installation is. You don’t need to be a master mechanic to get this done in your driveway or workshop. The entire swap typically takes less than 10 minutes.
- Safety First: Always disconnect the negative terminal on your vehicle’s battery to prevent any electrical shorts and to help reset the system.
- Locate the BCM: In most 2004-2007 Savana and Express vans, the BCM is located in the center of the dashboard, often behind a lower access panel. You may need to remove a trim piece to see it.
- Unplug and Remove: The module is held in by clips or a few small bolts. Carefully disconnect the wiring harnesses (they have release tabs) and remove the old BCM from its mounting bracket.
- Install the New Module: Seat the newly cloned BCM into the mounting bracket and securely reconnect all the wiring harnesses. You’ll 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 functions: lights, locks, windows, wipers, and the HVAC system. Start the vehicle to ensure it runs correctly.
Verified Vehicle Compatibility
This BCM is a direct-fit replacement for a wide range of GM vehicles. While this page focuses on the 2004-2007 Savana 2500 BCM, it is also compatible with the following models. Please verify your part number (15116066) or match your vehicle below.
GMC: Sierra 1500/2500/3500 (03-07 Classic), Sierra Denali (03-07 Classic), Yukon & Yukon XL 1500/2500 (03-06), Savana Van 1500/2500/3500 (04-07 w/ PRP package)
Cadillac: Escalade, ESV, EXT (03-06)
Hummer: H2 (03-07)
Note: Fitment can depend on specific options like transmission or cab type. Always match your part number for guaranteed compatibility. This unit interchanges with part numbers 10383536, 15136225, 15198116, and others.
Frequently Asked Questions
How does the Cloning Service work?
After you place your order, you’ll receive instructions to send us your original BCM. Our technicians will extract the vehicle-specific data and flash it directly onto the replacement module. This ensures 100% compatibility with your van’s existing keys, security system, and options without any need for a dealer visit.
Do I get my old BCM back?
Yes, absolutely. Your original module is always returned to you along with the programmed replacement unit. We do not keep your old part, and there is no core charge.
What if my airbag light is on after installation?
In some cases, the new BCM needs to be electronically ‘introduced’ to the airbag system’s computer (SDM). If the airbag light stays on, a technician will need to perform a ‘Setup SDM Primary Key in BCM’ procedure with a professional scan tool. This is a quick sync that resolves the light.
Is any other relearn procedure required?
Occasionally, a Brake Pedal Position (BPP) sensor relearn might be necessary to ensure brake lights and traction control function correctly. This is also a simple procedure that can be performed with a capable bi-directional scan tool.