Restore Full Control to Your GM Workhorse
If your 2004-2007 GMC Savana 3500 is plagued by bizarre electrical issues—from flickering lights and a dead HVAC blower to a security system that won’t let you start the engine—the Body Control Module (BCM) is the likely culprit. As a technician with over two decades of experience, I’ve seen these modules fail countless times, turning a reliable work van into a source of constant frustration. This replacement BCM, part number 15116066, is the definitive solution. We pre-program it to your van’s specific VIN, so it arrives ready for a true plug-and-play installation, getting you back on the road without a costly trip to the dealership.
A Technician’s Notebook: The Case of the Unreliable Work Van
I remember a contractor bringing his ’06 Savana 3500 into the shop. The complaint was intermittent no-start and the radio and interior lights would sometimes stay on, draining the battery overnight. He was losing money every day the van was down. A scan showed a cluster of communication DTCs, including a B1001. After checking the main grounds, we pinpointed the BCM. A failing internal relay was causing the power drain. We installed a VIN-programmed module just like this one. The total time on the lift was under 30 minutes. He drove out with a reliable van, and I knew we’d saved him from days of chasing electrical ghosts. That’s the value of a direct, pre-programmed solution.
Is Your Savana Van Showing These Electrical Faults?
A failing BCM acts like a glitch in your vehicle’s nervous system. If you’re experiencing any of the following, it’s time for a replacement. This module is a direct fix for these common issues.
- ✔ The HVAC blower motor works intermittently or not at all.
- ✔ Your power windows, door locks, or interior lights are behaving erratically.
- ✔ The airbag warning light is illuminated, often with a diagnostic trouble code like B1001 (Option Configuration Error).
- ✔ The anti-theft or security system prevents the engine from starting.
- ✔ You’re experiencing strange battery drain issues or grounding problems.
- ✔ The instrument cluster displays false warnings or acts erratically.
Straightforward 5-Minute Installation Guide
Installing your new 2004-2007 Savana 3500 BCM is a simple process that requires basic hand tools and no special diagnostic equipment for the initial swap. For Savana and Express vans, the BCM is typically located in the center of the dashboard.
- 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 Module: Find the BCM in the center dash area. You may need to remove a lower dash panel for access. It’s a black plastic box with several large electrical connectors.
- Swap the BCM: Carefully unplug the wiring harness connectors from the old module. Unbolt or unclip the old BCM from its mounting bracket and remove it.
- Install the New Module: Secure the new, pre-programmed BCM onto the mounting bracket. Firmly reconnect all wiring harnesses, ensuring each plug clicks into place.
- Reconnect and Test: Reconnect the negative battery terminal. Start the vehicle and test all body functions—lights, locks, windows, wipers, and HVAC—to confirm the repair was successful.
Post-Installation Note: In some cases, an airbag light may persist. This requires a professional scan tool to perform the ‘Setup SDM Primary Key in BCM’ procedure. This is a simple sync function, not a full reprogramming. Additionally, a Brake Pedal Position relearn may be needed on some models.
Verified Fitment for Your GM Vehicle
While this is a key part for the 2004-2007 Savana 3500 BCM replacement, it also fits a wide range of other GM trucks, vans, and SUVs. This module is interchangeable with part numbers 10383536, 15136225, 15198116, and others. Please verify your vehicle in the list below.
EXPRESS 3500 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)
EXPRESS 2500 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)
EXPRESS 1500 VAN 04-07 Body Control (BCM); (center dash), w/commercial tradesman package (opt PRP)
SILVERADO 1500/2500/3500 PICKUP 03-07 (Classic) Crew Cab
SIERRA 1500/2500/3500 PICKUP 03-07 (Classic) Crew Cab
AVALANCHE 1500/2500 02-06
TAHOE 03-06
YUKON & YUKON XL 1500/2500 03-06
SUBURBAN 1500/2500 03-06
ESCALADE, ESV, EXT 03-06
HUMMER H2 03-07
Frequently Asked Questions
Do I need to send my old BCM back?
No, there is no core charge for this part. You can keep or dispose of your original module without any extra fees.
Is this BCM truly plug-and-play?
Yes. We program the module to the VIN you provide during checkout. This ensures it communicates correctly with your vehicle’s other systems right out of the box, avoiding the need for a dealership visit for programming.
What tools do I need for installation?
For most models, you’ll only need basic hand tools like a socket set or screwdriver to remove the lower dash panel and unbolt the module. No special electronic tools are required for the physical installation.
My airbag light is on after installing the new BCM. What do I do?
This is a known security handshake procedure on GM vehicles. The BCM and the airbag’s Sensing and Diagnostic Module (SDM) need to be synced. A repair shop with a professional-grade scan tool can perform the ‘Setup SDM Primary Key in BCM’ procedure in a few minutes to resolve this.
Will this fix my intermittent no-start problem?
If your no-start issue is caused by the factory security system (Passlock/Passkey) being controlled by a faulty BCM, then yes, this new module is designed to resolve that problem permanently.