Restore Full Functionality to Your GM Vehicle
If you’re dealing with bizarre electrical issues in your 2008-2012 Express 2500 Van—like flickering dash lights, power windows with a mind of their own, or a security system that prevents your van from starting—you’ve likely pinpointed a failing Body Control Module (BCM). The BCM is the nerve center for your vehicle’s comfort and security features. When it fails, it can cause a cascade of frustrating and seemingly unrelated problems. This isn’t just an inconvenience; for a work van, it’s downtime that costs you money.
This replacement BCM, part number 20815898, is the definitive solution. We go beyond simply selling you a part; we provide a complete cloning service. This means we transfer the essential data from your original, faulty module directly onto this replacement unit. The result is a true plug-and-play component that restores your vehicle’s functions without a mandatory, expensive trip to the dealership for programming.
A Technician’s Notebook: The Work Van That Wouldn’t Cooperate
I remember a fleet customer bringing in an Express 2500 with a laundry list of complaints: the dome light stayed on, the driver’s power lock was dead, and the radio would randomly shut off. His mechanics had already replaced the battery and checked the main grounds. After hooking up my scan tool, I saw multiple ‘U’ codes, indicating a communication breakdown. The culprit? A classic BCM failure. Instead of a costly new module and hours of programming, we used a cloned BCM. We had the old one out, the data cloned, and the new one in before lunch. The van was back on the road making money that afternoon—a simple, effective repair that solved every single one of his electrical gremlins.
Is Your Vehicle Showing These Symptoms?
A failing BCM can manifest in many ways. If you’re experiencing any of the following, this module is the likely solution you need:
- ✔ Erratic or non-functional interior and exterior lights.
- ✔ Power windows, mirrors, or door locks not working correctly.
- ✔ The security or anti-theft light is illuminated, causing a no-start condition.
- ✔ Intermittent warning lights on the instrument cluster.
- ✔ Communication error codes, such as U0140 (Lost Communication With Body Control Module).
- ✔ A parasitic battery drain that leaves you with a dead battery.
Your Straightforward BCM Installation Guide
Installing your cloned BCM is a manageable job for a DIYer or any professional technician. While locations vary slightly by model, the process is generally the same.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the BCM: On most Express and Savana vans, the BCM is located in the center dash area, often accessible by removing lower dash panels. On other GM 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 from the old BCM. They have locking tabs that need to be pressed. Once disconnected, unbolt or unclip the module from its mounting bracket.
- Install the New Module: Mount the new, cloned BCM in the same location and securely plug in all the electrical connectors. You should hear a ‘click’ as they lock 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, etc.—to confirm the repair.
Important Post-Installation Steps
Thanks to our cloning service, most vehicles will not require any additional procedures. However, in some cases, you may need to perform a relearn procedure. Please note the following:
- Airbag System Sync: If the airbag (SRS) light is on after installation, a ‘Setup SDM Primary Key in BCM’ procedure must be performed with a compatible professional scan tool. This syncs the BCM with the airbag system.
- Brake Pedal Position Relearn: On certain models, a brake pedal position sensor relearn may be needed to ensure correct brake light operation and to prevent issues with the traction control system.
Disclaimer: Vehicle systems vary. We always recommend consulting a factory service manual or a certified technician if you are unsure about any step.
Verified Compatibility for Your Vehicle
This BCM is a direct-fit replacement for a wide range of General Motors vehicles. Please verify your part number or match your vehicle from the list below. This module is compatible with 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, and 95151084.
AVALANCHE 1500 10 (ID 25892622)
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 VAN 08-12
EXPRESS 2500 VAN 08-12
EXPRESS 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 VAN 08-12
SAVANA 2500 VAN 08-12
SAVANA 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
Frequently Asked Questions
What is a BCM cloning service?
Our cloning service is a process where we transfer the vehicle-specific software and security data from your original BCM to the replacement unit. This makes the new module a perfect electronic match for your vehicle, preserving things like key fob programming and vehicle options, and allows you to avoid expensive dealership programming.
How do I know my BCM is the problem?
While the symptoms listed above are strong indicators, the only way to be 100% certain is through proper diagnostics with a professional scan tool that can communicate with the BCM. Checking for communication codes (U-codes) is a key diagnostic step.
Is this a difficult part to install myself?
For someone with basic mechanical skills and tools, this is a very manageable installation. The most challenging part is typically accessing the module’s location within the dash. Our cloning service removes the most difficult part of the job: the computer programming.
What happens to my original BCM?
Your original module is required for the cloning process. After we successfully transfer the data, we securely package and return your original module along with your newly programmed replacement. We do not keep your old part.
Do I need to send you my VIN?
No, a VIN is not required for our cloning service. The cloning process copies all necessary information directly from your original module, which is a more comprehensive method than programming by VIN alone. Just send us your original BCM.