End the Electrical Headaches in Your GM Vehicle
If you’re dealing with flickering lights, a dead HVAC blower, or power windows with a mind of their own, you’re not alone. As a technician with over two decades of experience, I’ve seen how a failing Body Control Module (BCM) can cause some of the most frustrating and hard-to-diagnose issues in GM trucks and vans. This isn’t just an inconvenience; it can affect your vehicle’s security and daily usability. This replacement BCM, part number 15136225, is the reliable, straightforward solution to restore order to your vehicle’s electronics.
The biggest advantage here is that we handle the programming for you. Before shipping, we flash the module with your vehicle’s specific VIN and the latest GM software. This means you can skip the expensive trip to the dealership for programming. It arrives at your door ready for a plug-and-play installation, getting your work van or family SUV back to 100% functionality without the extra cost or downtime. This is the exact type of solution I recommend to my customers to save them time and money.
A Technician’s Notebook: The Case of the Contractor’s Van
A local contractor brought in his 2006 Savana 2500 work van with a list of bizarre problems. The dome lights wouldn’t turn off, the power locks worked intermittently, and sometimes the van wouldn’t start, flashing the security light. He was losing work time and was worried about the tools in his van. After confirming power and grounds were good, my scanner pointed to a BCM communication fault. Instead of a costly dealer part and programming appointment, we ordered a VIN-programmed module. The swap took less than 10 minutes, and it immediately solved every single issue. He was back on the road the same afternoon, a testament to how effective this simple repair can be.
Is Your GM Van or Truck Showing These Electrical Faults?
- ✔ Unresponsive or erratic HVAC controls, including a blower motor that won’t turn on or off.
- ✔ Power windows, door locks, or interior/exterior lights that don’t work correctly or function randomly.
- ✔ An active airbag warning light on the dash, often accompanied by diagnostic trouble code (DTC) B1001.
- ✔ Security system problems, including the PassLock system preventing the engine from starting.
- ✔ A cluster of seemingly unrelated body-related DTCs stored in the vehicle’s memory.
- ✔ Poor ground signals causing a variety of unpredictable electrical gremlins.
A Straightforward Guide to BCM Installation
For most DIYers and professionals, this is a quick and simple job. For the 2004-2007 Savana 2500 BCM, the module is typically located in the center of the dash. The entire process should take only a few minutes.
- Safety First: Always disconnect the negative terminal on your vehicle’s battery before starting any electrical work.
- Locate the BCM: On Savana and Express vans, find the module in the center dash area. On most trucks and SUVs, it’s under the driver’s side of the dashboard, near the steering column.
- Swap the Module: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that need to be pressed. Remove the old module and install the new one in its place.
- Reconnect and Test: Securely plug the connectors into your new, pre-programmed BCM. Reconnect the battery terminal. Start the vehicle and test all functions: lights, locks, windows, wipers, and HVAC to ensure everything is working as it should.
Important Post-Installation Note: In some cases, you may need a professional scan tool for follow-up procedures. If the airbag light remains on, an ‘SDM Key Relearn’ is required. A ‘Brake Pedal Position Relearn’ may also be necessary on certain models. These are simple procedures for any qualified shop.
Will This Fit My Vehicle?
This module is a direct replacement for a wide range of GM vehicles and interchanges with part numbers 10383536, 15116066, 15136225, 15137393, and more. It is confirmed to fit the following models:
- Chevrolet Avalanche 1500/2500 (2002-2006)
- Chevrolet Express Van 1500/2500/3500 (2004-2007)
- Chevrolet Silverado 1500/2500/3500 (2003-2007 Classic)
- Chevrolet Suburban 1500/2500 (2003-2006)
- Chevrolet Tahoe (2003-2006)
- GMC Savana Van 1500/2500/3500 (2004-2007)
- GMC Sierra 1500/2500/3500 & Denali (2003-2007 Classic)
- GMC Yukon & Yukon XL 1500/2500 (2003-2006)
- Cadillac Escalade, ESV, EXT (2003-2006)
- Hummer H2 (2003-2007)
Frequently Asked Questions
What does a Body Control Module do?
The BCM acts as the central computer for your vehicle’s body electronics. It controls non-engine related functions like power windows, locks, lights, wipers, the security system, and the HVAC system.
Is this BCM really plug-and-play?
Yes. We program the module to your vehicle’s VIN before it ships. This ensures it communicates correctly with your vehicle’s other systems right out of the box, eliminating the need for a separate programming service.
Do I need to return my old BCM?
No, there is no core charge for this part. You can keep or dispose of your old module without any hassle.
My airbag light is on after installing. What do I do?
This is a normal security measure. The new BCM needs to be synced with the airbag’s computer (SDM). A repair shop with a professional-grade scan tool can perform the ‘Setup SDM Primary Key in BCM’ procedure in a few minutes to turn off the light.
Where is the BCM located on my 2005 Savana 2500 Van?
On the 2004-2007 GMC Savana and Chevrolet Express vans, the BCM is located behind the dashboard panel in the center of the vehicle, often near the radio or HVAC controls.