Restore Full Electrical Function to Your GM Vehicle
Are you battling bizarre electrical problems in your GMC Savana, Chevy Express, or other GM vehicle? Flickering lights, malfunctioning power windows, a dead instrument cluster, or a security system that prevents your van from starting are all classic signs of a failing Body Control Module (BCM). The BCM is the central command center for your vehicle’s body electronics, and when it fails, it can cause a wide range of frustrating and seemingly unrelated issues. This replacement BCM, part number 20921436, is the definitive solution to restore your vehicle’s proper operation.
From the Diagnostic Bay
We had a contractor come in with his 2011 Savana 2500 work van. He was losing money because the van would randomly refuse to start, and the interior lights would stay on, draining the battery overnight. He’d replaced the battery and checked the alternator, but the gremlins persisted. A quick scan showed multiple communication loss codes with the BCM. Instead of a costly, time-consuming trip to the dealer, we supplied him with one of these VIN-programmed modules. He installed it in his parking lot, and the van fired right up with no more issues. He was back on the job the same day, a testament to how a simple, pre-programmed part can solve a complex problem.
Is Your Vehicle’s BCM Failing?
A faulty BCM can manifest in numerous ways. Look out for these common symptoms:
- ✔ Power windows, mirrors, or door locks operating erratically or not at all.
- ✔ Interior or exterior lights flickering, staying on, or not turning on.
- ✔ The security or anti-theft system engaging randomly, causing a no-start condition.
- ✔ Inaccurate or non-functional gauges on your instrument panel.
- ✔ HVAC (heating and air conditioning) controls being unresponsive.
- ✔ Diagnostic trouble codes (DTCs) indicating a loss of communication with the BCM.
A True Plug-and-Play Solution for Your 2008-2012 Savana 2500 BCM
Don’t let a faulty module keep your vehicle off the road. We make the replacement process simple. This BCM isn’t just a part in a box; it’s a complete solution. We program the module with the latest GM software updates using the VIN you provide. This ensures it communicates perfectly with your vehicle’s other systems right out of the box, eliminating the need for expensive dealership programming. This is the most efficient way to replace your failing 2008-2012 Savana 2500 BCM and get your van running reliably again.
Post-Installation Information
While this module is programmed for your VIN, some vehicle systems may require a relearn or synchronization procedure after installation. These are simple procedures for a qualified technician with a professional scan tool.
- Airbag System Sync: If the airbag warning light is illuminated after installation, a ‘Setup SDM Primary Key in BCM’ procedure is necessary to sync the systems.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration may be needed to ensure correct brake light and traction control operation.
Always consult a factory service manual or a qualified technician for vehicle-specific guidance.
Guaranteed Fitment
This module replaces a wide range of original part numbers, ensuring compatibility. If your old module has any of the following numbers, this part is a direct replacement: 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.
Frequently Asked Questions
Do I need to have this BCM programmed by a dealer?
No. We program the module to your vehicle’s specific VIN before we ship it to you. This makes the installation process much simpler and saves you from a costly trip to the dealership.
How do I provide my VIN?
After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). We cannot ship your order until we receive your VIN to perform the necessary programming.
What does the Body Control Module (BCM) do?
The BCM acts as the brain for your vehicle’s body electronics. It controls functions like power windows, locks, interior and exterior lighting, the security system, and the instrument cluster.
What if my airbag light is on after I install the new BCM?
This can happen occasionally. It means the new BCM needs to be synchronized with the airbag system’s Sensing and Diagnostic Module (SDM). A technician with a professional scan tool can perform the ‘Setup SDM Primary Key in BCM’ procedure to resolve this.
Is there a core charge? Do I need to send my old part back?
No, there is no core charge for this part. You can keep your original module.