Tired of Electrical Gremlins in Your GM Van?
If you’re dealing with flickering lights, power windows with a mind of their own, or a security light that won’t turn off, you’re likely facing a failing Body Control Module (BCM). As the central nervous system for your vehicle’s comfort and convenience features, a faulty BCM can cause a cascade of frustrating and unpredictable problems. In my 20+ years of diagnostics, I’ve seen these modules cause everything from intermittent no-start conditions to complete communication loss with other vital vehicle systems, often triggering codes like U0140 (Lost Communication With BCM).
This isn’t just a replacement part; it’s a complete, hassle-free solution. We offer a professional Cloning Service for this BCM. This means we transfer the exact data from your original module to this replacement unit. The result? A true plug-and-play installation that bypasses the need for expensive dealership programming or complex scan tool procedures. Simply send us your old module, we’ll handle the data transfer, and ship both units back to you. It’s the most efficient way to get your workhorse back on the road.
Case Study: A Tricky Diagnosis
A local contractor brought in his 2011 Express 3500 work van. The complaint was bizarre: the radio would turn on and off randomly, the dome lights would stay on, and occasionally the turn signals wouldn’t work. He’d already replaced the battery and checked all the fuses. A quick scan showed a dozen intermittent U-codes, all pointing to communication failures. This is a classic symptom of a failing BCM. Instead of a costly new module and programming from the dealer, we used our cloning service. We transferred his van’s data to a quality replacement unit, and he installed it himself in under an hour. The van has been electrically stable ever since, saving him hundreds in parts and labor.
Is Your Vehicle Showing These Symptoms?
- ✔ Erratic or non-functional power windows, door locks, or interior/exterior lights.
- ✔ The security or anti-theft light stays on, preventing the engine from starting.
- ✔ Dashboard warning lights appear and disappear without reason.
- ✔ The radio or climate control system behaves unpredictably.
- ✔ Diagnostic trouble codes (DTCs) related to communication errors, such as U0140, U0155, or B1001.
- ✔ Complete failure of multiple electronic accessories at once.
Your Straightforward BCM Swap Guide
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the BCM: In most Express and Savana vans, the BCM is located in the center dash area, often accessible by removing lower dash panels. 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. Most have a locking tab that needs to be pressed or lifted. Once disconnected, unbolt the module from its mounting bracket.
- Install the New Module: Seat the replacement BCM into the mounting bracket and secure it. Reconnect all electrical connectors, ensuring they click firmly into place.
- Reconnect Power: Reattach the negative battery terminal and tighten it securely.
- Verify Operation: Start the vehicle and test all body functions—lights, locks, windows, radio, etc.—to confirm the repair was successful.
Important Post-Installation Steps
Our cloning service makes this process as simple as possible. However, due to the complex nature of modern vehicle systems, a couple of additional steps may be required:
- Airbag System Sync: If the airbag warning light is illuminated after installation, a ‘Setup SDM Primary Key in BCM’ procedure must be performed with a professional scan tool. This syncs the security data between the modules.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor relearn may be needed to ensure correct brake light and traction control operation.
Please Note: The customer’s original module is always returned with the newly programmed replacement. We do not keep your core. Always consult a factory service manual for procedures specific to your vehicle’s exact year and model.
Verified Compatibility for Your GM Vehicle
This Body Control Module is a direct fit for a wide range of GM vehicles and is a replacement for numerous part numbers. Please verify your original part number is on this list or that your vehicle is listed below. The most reliable way to ensure compatibility is to match the part number from your original BCM.
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
Frequently Asked Questions
How does the cloning service work?
After you purchase, you’ll ship your original BCM to us. We use specialized equipment to read the unique vehicle data (including VIN, mileage, and key information) from your module and write it directly onto the replacement unit. We then ship both your original and the ready-to-install replacement back to you.
Do I need to send you my VIN?
While providing your VIN is helpful, sending us your original module for cloning is the most important step. The cloning process transfers all necessary data, making it a perfect match for your vehicle without needing to program from scratch using a VIN.
Will I have to program my keys again?
No. Because we are cloning your original module, the replacement BCM will already have your key information stored. This is a major benefit that saves you a trip to a locksmith or the dealer.
Is this a difficult part for a DIYer to replace?
For most of the vehicles this fits, especially the Express and Savana vans, the replacement is straightforward. It typically involves removing a few dash panels for access. With basic hand tools and our installation guide, an experienced DIYer can complete the job in about an hour.
What happens to my old BCM?
Your original BCM is always returned to you along with the cloned replacement. We do not keep customer cores. You can keep it for your records or dispose of it as you see fit.
What if my airbag light comes on after installation?
This is uncommon but can happen. It means the BCM and the airbag module (SDM) need to re-synchronize their security keys. A professional mechanic with a capable scan tool will need to perform the ‘Setup SDM Primary Key in BCM’ procedure to resolve it.