Is Your GM Van or SUV Plagued by Electrical Gremlins?
If you’re dealing with flickering lights, malfunctioning power windows, a security system that acts up, or other bizarre electrical issues in your 2008-2012 GMC Savana 1500, the Body Control Module (BCM) is often the culprit. The BCM acts as the central command center for your vehicle’s body electronics. When it fails, it can cause a cascade of frustrating and seemingly unrelated problems. This replacement BCM, part number 20864767, is the reliable solution to restore full functionality to your vehicle.
From the Diagnostic Bay
We had a 2011 Express work van come in that was a complete mystery to the owner. The dome lights would stay on, draining the battery overnight, the radio would randomly shut off, and the power locks worked only intermittently. The owner had already replaced the battery and checked all the fuses. After connecting our diagnostic tool, we found multiple communication error codes all pointing to one source: a failing BCM. We installed a VIN-programmed module just like this one, and it was like flipping a switch. All the strange issues vanished, and the van was back to being a reliable workhorse. A single component was responsible for all that chaos.
Common Symptoms of a Failing GM BCM
- ✔ Erratic or non-functional interior and exterior lights.
- ✔ Power windows, door locks, or mirrors not working correctly.
- ✔ The security system or keyless entry failing to operate.
- ✔ Instrument cluster warning lights appearing without cause (e.g., ABS, Airbag).
- ✔ A/C and climate control issues.
- ✔ Intermittent no-start conditions or a dead battery from parasitic drain.
- ✔ Communication errors when using a diagnostic scan tool.
Plug & Play Solution for Your 2008-2012 Savana 1500 Body Control Module
Don’t waste time and money at the dealership. We make this repair process simple. When you purchase this module, simply provide us with your vehicle’s VIN. Our technicians will program the BCM with the latest GM software specific to your van’s configuration. This means the module arrives at your door ready for installation, eliminating the need for expensive programming tools or a trip to a mechanic for software flashing. This unit is a direct replacement for a wide array of part numbers, ensuring broad compatibility across many GM models including the Express, Tahoe, Acadia, and more. Please verify your original part number against the extensive list provided to ensure a perfect match.
Important Post-Installation Steps
While this module is programmed for your VIN, some vehicle systems may require a ‘handshake’ with the new BCM. This can sometimes require additional steps:
- Airbag System Sync: If the airbag light is on after installation, a ‘Setup SDM Primary Key in BCM’ procedure is needed. This requires a professional-grade scan tool to sync the new BCM with the airbag system.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor relearn may be necessary to ensure correct brake light operation and to satisfy the traction control system.
Always consult a factory service manual or a qualified technician if you are unsure about these procedures.
Frequently Asked Questions
Do I need to program this BCM?
No. We handle all the programming for you before shipment. Just provide your vehicle’s VIN during or after checkout, and it will arrive ready to install.
What is a BCM and what does it do?
The Body Control Module (BCM) is a computer that manages and controls your vehicle’s electronic accessories, such as power windows, locks, lights, wipers, and the security system.
How do I find my original part number?
Your original BCM’s part number is printed on a sticker on the module itself. You will need to locate and access the module (often under the dash) to read this number.
Is this a guaranteed fix for my electrical problems?
A faulty BCM is a very common cause for the symptoms listed. However, proper vehicle diagnosis is always recommended, as wiring or sensor issues can sometimes mimic BCM failure.
What does ‘no core charge’ mean?
It means you do not have to send your old, faulty BCM back to us. You can keep it or dispose of it yourself, saving you time and return shipping costs.
Will this fit other vehicles besides the Savana 1500?
Yes. This BCM is compatible with a wide range of GM trucks, vans, and SUVs from a similar era. Please review the detailed fitment list on this page and match your part number to confirm compatibility.