Restore Full Functionality to Your GM Vehicle
Is your 2008-2012 Savana 1500 Van or other GM vehicle acting possessed? Flickering lights, malfunctioning power windows or locks, and a dashboard lit up with warning lights are classic signs of a failing Body Control Module (BCM). As the central hub for your vehicle’s body electronics, a faulty BCM can cause a cascade of frustrating and unpredictable issues. Instead of facing a costly trip to the dealership for a new module and programming, we offer a streamlined, reliable solution. This BCM, part number 20921435, comes with our professional cloning service, making the repair process as simple as possible.
Is Your Vehicle Showing These Symptoms?
- ✔ Intermittent or non-working power windows, door locks, or interior lights.
- ✔ The security or anti-theft light stays on or flashes, preventing the engine from starting.
- ✔ Erratic behavior from the instrument cluster gauges or warning indicators.
- ✔ Headlights, taillights, or turn signals not functioning correctly.
- ✔ Diagnostic Trouble Codes (DTCs) stored in the system, such as U0140 (Lost Communication With Body Control Module).
- ✔ The horn sounding off at random intervals.
A Technician’s Notebook
I remember a fleet customer with a 2011 Express work van that was driving his crew crazy. The interior lights would stay on, draining the battery overnight, and the power locks only worked when they felt like it. They had already replaced the battery twice. A quick scan showed communication errors pointing to the BCM. Instead of tying up the van for days at a dealer, we used our cloning service. We transferred all the original data to a replacement unit. The van was back on the road the next day, saving the business significant downtime and a hefty dealership bill. It’s a perfect example of how the right part and service can be a simple fix for a complex problem.
How Our BCM Cloning Service Works
Our goal is to get you back on the road with minimal hassle. The process is simple: after you purchase this module, you will send us your original BCM. Our technicians will then perform a direct data transfer, copying all the essential information—including your vehicle’s VIN, key data, and specific options—to this replacement unit. We then ship both your original module and the ready-to-install replacement back to you. This means no additional programming or calibration is needed on your end, saving you time and hundreds of dollars in dealership fees. It’s the most efficient way to replace a failed 2008-2012 Savana 1500 BCM.
A Straightforward Guide to Installation
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes before beginning work.
- ✔ Locate the BCM: On most Savana and Express vans, the BCM is located in the center dash area. On other GM models, it may be under the driver’s side dash or near the steering column. A quick search for your specific model will confirm the location.
- ✔ Remove the Old Module: Carefully unplug the electrical connectors. They have locking tabs that need to be pressed to release. Once disconnected, unbolt or unclip the module from its mounting bracket.
- ✔ Install the New Module: Mount the cloned BCM you received from us in the same position as the old one. Securely reconnect all electrical connectors, ensuring they click into place.
- ✔ Reconnect and Test: Reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all body functions: lights, locks, windows, horn, and wipers. Start the vehicle to ensure it runs properly.
Important Post-Installation Notes
While our cloning service makes this a near plug-and-play repair, some GM systems may require a ‘handshake’ after a new module is introduced. Be aware of the following potential procedures:
- Airbag System Sync: If the airbag warning light is illuminated after installation, a ‘Setup SDM Primary Key in BCM’ procedure is needed. This requires a professional-grade scan tool to sync the modules and clear the light.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor relearn may be required to ensure correct brake light operation and to keep the traction control system happy.
Disclaimer: Vehicle systems vary. We always recommend consulting a factory service manual or a certified technician if you are unsure about any step.
Will This Fit My Vehicle?
This BCM is a direct replacement for a wide range of GM vehicles and part numbers. Please verify that your vehicle is on this list and that your original part number is listed below. Our cloning service ensures the software will match your vehicle’s specific configuration.
This module is compatible with the following part numbers: 10382479, 15093910, 15276271, 15299986, 15819552, 15828601, 15837419, 15872388, 15872421, 15880684, 15921352, 15921353, 15948438, 15948439, 20815898, 20839063, 20864767, 20864768, 20921435, 20921436, 20935349, 22860591, 25826124, 25826125, 25847588, 25847589, 25892622, 25910474, 25934762, 25934763, 95151084.
Fitment includes, but is not limited to:
- 2008-2012 Savana 1500 Van
- 2008-2012 Express 1500/2500/3500 Vans
- 2007-2012 Acadia
- 2010 Tahoe, Suburban, Yukon, Escalade (check ID)
- 2006-2012 Impala
- 2007-2009 Equinox & Torrent
- And many more GM models as listed in the fitment data.
Frequently Asked Questions
Frequently Asked Questions
Why do I need to send you my original BCM?
Your original BCM contains vital data unique to your vehicle, including the VIN, security key codes, and settings for your specific options. Our cloning service transfers this data to the replacement module, ensuring it works perfectly with your vehicle without requiring expensive dealership programming.
Is this a simple plug-and-play installation?
For most vehicles, yes. Because we clone your original data, the module is pre-configured for your van. In some cases, as noted above, a simple relearn procedure for the airbag or brake pedal sensor might be necessary with a pro-level scan tool.
What happens to my old module? Do you keep it?
We never keep your original parts. Your original BCM will be returned to you along with the newly programmed replacement unit.
Will this fix my ‘Service Theft System’ message?
A faulty BCM is a very common cause of this message and a no-start condition. By cloning your key data, this replacement BCM will correctly recognize your keys and resolve security system conflicts caused by the module itself.
How do I find the part number on my BCM?
The part number is printed on a sticker directly on the BCM’s housing. You will need to locate and likely remove the module to read the sticker clearly. Matching this number to our compatible list ensures you are ordering the correct hardware.