End Electrical Nightmares in Your 2004-2007 GMC Savana 3500
If you’re a contractor or fleet owner, you know that a work van sidelined by electrical problems isn’t just an inconvenience—it’s lost time and money. When your 2004-2007 Savana 3500 starts acting up with flickering lights, a dead instrument cluster, or a security system that won’t let you start the engine, the Body Control Module (BCM) is often the culprit. This isn’t just another part; it’s the electronic brain for your van’s essential comfort and security features. Replacing it used to mean a costly trip to the dealership for programming. Not anymore.
This OEM-quality replacement BCM, part number 15136225, arrives at your door fully programmed to your van’s specific Vehicle Identification Number (VIN). This means you get a true plug-and-play solution that restores function right out of the box. We handle the complex part so you can handle the simple installation, getting your workhorse back on the road where it belongs. Stop chasing electrical gremlins and get a reliable fix that lasts.
Case Study: A Tricky Diagnosis
A local plumber brought in his ’06 Savana 3500 last month with a list of bizarre symptoms. The radio would cut out, the dome light wouldn’t work, and worst of all, the van would intermittently refuse to start, just a click from the starter. He’d already replaced the battery and checked the alternator. After hooking up my pro-level scanner, I saw a slew of communication error codes pointing back to the BCM. These modules, especially in high-use commercial vans, can fail internally from heat cycles and vibration. We swapped in a VIN-programmed 2004-2007 Savana 3500 BCM, and every single issue was resolved in under 10 minutes. It’s a common failure point I’ve seen dozens of times, and a pre-programmed module is the fastest, most effective fix.
Is Your Work Van Showing These Electrical Gremlins?
- ✔ The anti-theft or security light stays on, preventing the engine from starting.
- ✔ Power windows, door locks, or mirrors work intermittently or not at all.
- ✔ HVAC controls are unresponsive, or the blower motor is stuck on one speed.
- ✔ Headlights, tail lights, or interior lights flicker or fail to turn on.
- ✔ The airbag warning light is illuminated, often with a B1001 diagnostic trouble code.
- ✔ Your scanner shows multiple communication loss codes with various modules.
Get Your Van Back on the Job: 5-Minute Installation Guide
You don’t need to be a master mechanic to install this part. The process is straightforward and requires only basic hand tools.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery to prevent electrical shorts and reset the system.
- Locate the BCM: On the Savana and Express vans, the BCM is typically found in the center of the dashboard, often behind a lower access panel. It’s a black box with several large multi-pin connectors.
- Swap the Module: Carefully unplug the wiring harnesses from the old BCM. They have release tabs that need to be pressed. Unbolt or unclip the old module and remove it.
- Install the New BCM: Secure your new, pre-programmed BCM in place and firmly reconnect all wiring harnesses. You should hear a click as they lock in.
- Final Steps & Re-Calibration: Reconnect the battery terminal. While the van will start and run, you must perform the ‘Setup SDM Primary Key in BCM’ procedure with a capable scan tool to clear the airbag light. Some vehicles may also require a brake pedal position sensor recalibration for optimal performance.
Verified Fitment for Your GM Vehicle
This module is a direct replacement for part number 15136225 and other interchangeable numbers. It is guaranteed to fit the following models, specifically the 2004-2007 Savana 3500 BCM for vans with the commercial tradesman package (RPO code PRP).
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)
And many other GM Trucks, Vans, and SUVs from 2002-2007. Please verify your part number or contact us with your VIN.
Frequently Asked Questions
Do I need to program this BCM?
No. We program the module to your vehicle’s VIN before shipping. It arrives ready for plug-and-play installation, saving you a trip to the dealership.
Where is the BCM located on my 2005 Savana 3500?
On most 2004-2007 Savana and Express vans, the BCM is mounted in the center of the dashboard, accessible by removing the lower dash trim panel.
Will this fix my airbag light?
A faulty BCM can cause the airbag light to come on. After installing this new module, the light must be reset by performing the ‘Setup SDM Primary Key in BCM’ procedure with a compatible high-end scan tool. This re-establishes communication between the BCM and the airbag system.
What is the ‘commercial tradesman package (opt PRP)’?
This refers to a specific equipment package (RPO code PRP) on GM vans that can affect which BCM is used. This module is compatible with vehicles equipped with this package.
Do I need to send my old part back?
No, there is no core charge for this part. You can keep or dispose of your old module at your convenience.