Restore Full Functionality to Your GM Vehicle
Is your 2008-2012 Savana 2500 Van acting possessed? Flickering lights, intermittent power windows, a security light that won’t turn off, or even a frustrating no-start condition are all classic signs of a failing Body Control Module (BCM). As the central command for your vehicle’s body electronics, a faulty BCM can cause widespread and confusing problems, costing you time and money. This isn’t just an inconvenience; for a work van, it’s a critical failure that can bring your business to a halt.
This replacement Body Control Module, compatible with part number 20921436 and others, is the definitive solution. We eliminate the biggest headache of BCM replacement: dealership programming. With our professional Cloning Service, we transfer the exact data from your original module to this replacement unit. The result? A true plug-and-play solution that gets your van back on the road without an expensive trip to the dealer.
Real-World Repair Story
Real-World Repair Story
A local contractor brought his 2011 Savana 2500 into my shop, completely frustrated. His power locks were working sporadically, the radio would cut out, and sometimes the van wouldn’t start, showing a security light. He’d already replaced the battery and checked fuses. After connecting my scan tool, I saw multiple U-codes (U0140, U0155) indicating a loss of communication with the BCM. Instead of just selling him a new module and sending him to the dealer for a $200+ programming fee, we performed a data clone. We transferred his van’s data to a tested module, and he installed it himself in under an hour. The van started right up, all electronics worked perfectly, and he was back on the job site the same afternoon. That’s the power of a properly prepared module.
Is Your Vehicle Showing These Symptoms?
A failing BCM can manifest in numerous ways. If you’re experiencing any of the following, your BCM is the likely culprit:
- ✔ Power windows, door locks, or mirrors operating intermittently or not at all.
- ✔ Interior or exterior lights flickering, staying on, or not working.
- ✔ The security system light is illuminated, preventing the engine from starting.
- ✔ Erratic behavior from the radio or instrument cluster gauges.
- ✔ Diagnostic trouble codes (DTCs) related to communication loss, such as U0140, U0141, or other U-codes.
- ✔ The horn honking unexpectedly or not working.
Your Straightforward BCM Swap Guide
Installing your cloned BCM is a manageable job for a DIYer or any professional mechanic. While the exact location varies by model, the process is generally similar.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the BCM: In most Savana and Express vans, the BCM is located in the center dash area, often accessible after removing a lower dash panel. For other models, it may be under the steering column or on the left-hand side of the dash.
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs that must be depressed. Once disconnected, unbolt or unclip the old BCM and remove it from the vehicle.
- Install the New Module: Mount your new, cloned BCM in the same location and securely reconnect all electrical harnesses. Ensure 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, radio, etc.—to confirm the repair.
Important Post-Installation Information
Our cloning service handles all the critical programming. However, on some GM vehicles, certain systems may need to be re-synced after the BCM is replaced. This is a normal part of the vehicle’s security and safety architecture.
- Airbag System Sync: If your airbag warning light is on after installation, a ‘Setup SDM Primary Key in BCM’ procedure is required. This must be done with a professional-grade scan tool to ensure the safety system is fully operational.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor relearn may be needed to ensure proper brake light and traction control operation.
Please Note: The customer’s original module is required for the cloning process and will be returned with the newly programmed unit. We do not keep your core.
Verified Vehicle Compatibility
This BCM is a direct replacement for a wide range of GM vehicles and interchanges with numerous part numbers. Please verify your part number is on this list or that your vehicle is listed below.
Replaces 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
ACADIA 07-12, AVALANCHE 1500 10, CAPRICE 11-13, CAPTIVA SPORT 12, CTS 08-13, DTS 06-11, ENCLAVE 08-12, EQUINOX 07-09, ESCALADE 10, ESCALADE ESV 10, ESCALADE EXT 10, EXPRESS 1500/2500/3500 VAN 08-12, G8 08-09, HUMMER H2 08-09, IMPALA 06-13, LUCERNE 06-11, MONTE CARLO 06-07, OUTLOOK 07-10, SAVANA 1500/2500/3500 VAN 08-12, SRX 07-09, STS 10, SUBURBAN 1500 10, TAHOE 10, TORRENT 07-09, TRAVERSE 09-12, VUE 08-10, YUKON 10, YUKON XL 1500 10. (Please check the detailed fitment list or contact us with your VIN to confirm.)
Frequently Asked Questions
How does the ‘Cloning Service’ work?
After you place your order, you will ship your original BCM to us. Our technicians will extract the unique vehicle data (including VIN, mileage, and key information) and flash it onto the replacement module. This makes the new module a perfect electronic match for your vehicle, avoiding the need for expensive dealer programming.
Do I get my old module back?
Yes. Your original module is always returned to you along with the programmed replacement unit. We need it solely for the data transfer process and do not keep it.
Is this a difficult part to install myself?
For someone with basic mechanical skills, this is a very manageable job. It typically involves removing a few dash panels and unplugging connectors. Our installation guide above provides a general overview of the process.
Will I absolutely need a scan tool after installation?
In many cases, no additional steps are needed. However, due to GM’s complex systems, some vehicles may require an airbag system sync or brake pedal position relearn, which does require a professional scan tool. This is only necessary if you have related warning lights after the install.
What happens if I install it and still have problems?
While this module will fix issues directly caused by a faulty BCM, it’s important to ensure the BCM was the root cause. If problems persist, it could indicate an issue with wiring, sensors, or other components. We are here to help with diagnostic advice if you run into any trouble.