If you’re dealing with bizarre electrical issues in your GM truck or van, you’re not alone. As a technician with over two decades of experience, I’ve seen firsthand how a failing Body Control Module (BCM) can turn a reliable workhorse into a source of constant frustration. One minute the power locks work, the next they don’t. The dome light stays on, the radio acts possessed, or worst of all, the security light flashes and the engine won’t start. This isn’t just an annoyance; it’s a problem that can leave you stranded. This is the definitive, hassle-free solution to restore order to your vehicle’s electronics.
This isn’t just a replacement part; it’s a complete fix. We take this genuine OEM-spec BCM and pre-program it specifically to your vehicle using your VIN. This means it arrives at your door with the latest GM software updates already loaded, ready for installation. You get to skip the expensive trip to the dealership for programming, saving you both time and hundreds of dollars in labor fees. This is the same process we’d use in a professional shop to guarantee a perfect match and seamless integration with your vehicle’s existing systems.
From the Diagnostic Bay
I remember a 2006 Savana 3500 work van that came into my shop. The owner, a contractor, was at his wit’s end. His interior lights would flicker randomly, the power door locks had a mind of their own, and twice in one week, the van refused to start, flashing the security light. He had already replaced the battery and checked the fuses. After connecting my scan tool, I saw a slew of communication error codes (U-codes) pointing to a network problem. The BCM is the central hub for these body systems. We confirmed power and ground to the module were good, pointing to internal failure. Installing a VIN-programmed 2003-2007 Savana 3500 BCM like this one solved every single one of his issues in one go. He was back on the job the next day.
Is Your GM Truck or Van Showing These Signs?
A faulty BCM is the root cause of many confusing electrical problems. If you’re experiencing any of the following, this module is very likely the solution you need:
- ✔ Erratic power window or power lock operation
- ✔ Interior or exterior lights that won’t turn on or off
- ✔ The security or anti-theft light is on, preventing the engine from starting
- ✔ Wipers or radio turning on by themselves or not working at all
- ✔ False warning messages on the instrument cluster (e.g., ‘Service 4WD’)
- ✔ Communication Diagnostic Trouble Codes (DTCs) like U0140, U0155, or B1001
- ✔ Inconsistent A/C compressor or blower motor function
Your Straightforward Installation Guide
For the 2003-2007 Savana and Express vans, the BCM is located behind the center of the dashboard. While professional installation is always an option, a confident DIYer can handle this job. Always consult a service manual for your specific vehicle’s diagrams and torque specs.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and wait a few minutes for the systems to discharge completely.
- Access the Module: Carefully remove the necessary dash trim panels to gain access to the BCM. On these vans, it’s typically mounted in the center stack area.
- Disconnect and Remove: Unplug the electrical connectors from the old BCM. They have locking tabs that need to be depressed. Once disconnected, unbolt the module from its mounting bracket and remove it.
- Install the New BCM: Mount your new, pre-programmed BCM in the same location. Securely plug in all the electrical connectors, making sure they click into place.
- Reconnect and Test: Reconnect the negative battery terminal. Turn the key to the ‘ON’ position (without starting) and test your electronics: windows, locks, lights, and wipers. Start the vehicle to ensure it runs correctly.
- Perform Relearns (If Needed): If the airbag light is on or brake functions seem off, proceed with the necessary relearn procedures as outlined below. Reassemble your dashboard trim.
Important Post-Installation Steps
Because this BCM is programmed to your VIN, most functions will work immediately. However, for full system integration and safety, be aware of these potential requirements:
- Airbag System Sync: If the airbag warning light is illuminated after installation, a ‘Setup SDM Primary Key in BCM’ procedure is needed. This syncs the new BCM with the airbag module and requires a professional-grade scan tool.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor relearn may be required to ensure correct brake light operation and to satisfy the traction control system.
Disclaimer: Vehicle systems vary. We always recommend consulting a factory service manual or a certified technician if you are unsure about any step.
Verified Fitment for Your GM Vehicle
This module, part number 15136224, is a direct replacement for a wide range of GM trucks and vans. It is compatible with part numbers 15167329, 15194169, 15747545, 15116065, 15198115, 15136876, and 10367689. Please confirm your vehicle is on the list below:
- Chevrolet Express 1500/2500/3500 Van: 2003-2007
- GMC Savana 1500/2500/3500 Van: 2003-2007
- Chevrolet Silverado 1500/2500/3500 Pickup: 2003-2007 (Classic Body Style)
- GMC Sierra 1500/2500/3500 Pickup: 2003-2007 (Classic Body Style)
- Chevrolet SSR: 2003-2006
Note: Specific options like Crew Cab or commercial packages may affect compatibility. Our VIN programming process ensures you receive the correct module for your exact configuration.
Frequently Asked Questions
How do I provide my VIN for programming?
After you complete your purchase, simply send us a message with your 17-digit Vehicle Identification Number (VIN). We cannot ship your order until we receive this information, as it’s essential for programming the module correctly.
Is this part truly plug-and-play?
For most functions, yes. Because it arrives programmed to your VIN, it will control the main body electronics right away. However, as noted, some vehicles may require a simple airbag sync or brake sensor relearn with a scan tool for 100% system integration.
Do I need to send my old BCM back?
No. There is absolutely no core charge for this part. You can keep your old module, which is helpful if you ever want to revert to the original for diagnostic purposes.
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’s Sensing and Diagnostic Module (SDM). A repair shop with a bi-directional scan tool can perform the ‘Setup SDM Primary Key in BCM’ procedure in a few minutes to turn the light off.
Will this BCM fix my specific problem for sure?
This module will fix any problem directly caused by a faulty BCM. The symptoms we’ve listed are the most common indicators. If your issue is caused by a bad switch, wiring, or another module, this part will not resolve it. Proper diagnosis is key.