Is Your Truck Driving You Crazy with Electrical Gremlins?
As a technician with over two decades under the hood, I’ve seen it all. A customer comes in with a 2015 Silverado, and the story is always the same: the radio turns on and off by itself, the power windows have a mind of their own, the dash lights flicker like a Christmas tree, or worse, the truck won’t start at all. You’ve checked the battery, you’ve inspected the fuses, but the bizarre problems persist. The culprit is almost always a failing Body Control Module (BCM).
The BCM is the central nervous system for your truck’s body electronics. It controls everything from interior lighting and power locks to security systems and accessory power. When it fails, communication between these systems breaks down, leading to frustrating and unpredictable behavior. Dealerships will quote you a fortune for a new module plus hours of labor for programming. Our solution bypasses that completely.
We offer a reliable, professionally programmed BCM that is a direct-fit replacement. We take the data from your original, faulty module and transfer it to this fully tested replacement unit. The result? A true plug-and-play component that restores full functionality to your vehicle without any need for expensive dealer tools or programming. This is the smart, cost-effective fix that gets you back on the road with confidence.
A Technician’s Notebook: The Phantom Drain Mystery
I remember a 2015 Sierra Denali that kept coming back with a dead battery. The owner had replaced the battery twice and the alternator once, but every few days, it would be completely drained. Standard parasitic draw tests were inconclusive. The issue was intermittent. On a hunch, I monitored the BCM data stream and noticed it wasn’t letting certain accessory circuits go to ‘sleep’ after the key was off. It was a classic internal BCM failure. We cloned his original module to one of our replacements, and the problem was solved instantly. It saved him from needlessly replacing more parts and finally gave him a reliable truck again.
Is Your GM Vehicle Showing These BCM Failure Signs?
A failing BCM can manifest in numerous ways. If you’re experiencing any of the following, this module is likely your solution. Common diagnostic trouble codes (DTCs) associated with BCM failure include U0140, U0155, and other ‘U’ (communication) codes.
- âś” Power windows, door locks, or mirrors operating erratically or not at all.
- âś” Interior or exterior lights flickering, staying on, or not turning on.
- âś” The security system acting up, causing no-start conditions.
- âś” Horn honking randomly or the alarm going off without reason.
- âś” ‘Service Stability System’ or other warning messages appearing on the dash.
- âś” Radio or infotainment system randomly shutting off or rebooting.
- âś” Inconsistent A/C and heater blower motor operation.
A Straightforward Guide to Swapping Your BCM
Installing your programmed BCM is a simple process. For the 2015 Silverado 1500, the BCM is typically located under the steering column. While exact steps may vary slightly by model, this general guide will walk you through it.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on any electronic components.
- Locate the BCM: On most compatible trucks and SUVs, you’ll find the BCM mounted to the left of the steering column, often behind a lower dash panel. You may need to remove a plastic trim piece for access.
- Disconnect Connectors: Carefully unplug all electrical connectors from the old BCM. They have locking tabs that need to be depressed. Do not force them.
- Remove the Old Module: Unbolt or unclip the old BCM from its mounting bracket and remove it from the vehicle.
- Install the New Module: Mount your new, pre-programmed BCM in the same location. Reconnect all electrical connectors securely, ensuring they click into place.
- Reconnect Battery: Re-attach the negative battery terminal.
- Perform Post-Install Checks: Start the vehicle and test all body functions—windows, locks, lights, radio, etc. Note that some vehicles may require the additional relearn procedures mentioned below.
Important Post-Installation Information
While our cloning service makes this a nearly plug-and-play repair, some vehicle systems may require a ‘handshake’ with the new BCM. This is normal.
- Airbag System Sync: If your airbag warning light is illuminated after installation, a simple ‘Setup SDM Primary Key in BCM’ procedure is needed. This requires a professional-grade scan tool and syncs the security data between the modules.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration might be necessary to ensure brake lights and traction control function correctly. This is also performed with a scan tool.
Disclaimer: We always recommend consulting a factory service manual or a qualified technician for procedures specific to your vehicle.
Verified Vehicle Compatibility for This Module
This BCM is a guaranteed fit for the following vehicles and part numbers. Please match your part number (13592137, 13506935, 13506936, 13587704, or 13594764) to ensure compatibility.
- ATS: 2015, 2016
- Corvette: 2015
- CTS: 2015, 2016
- Escalade / Escalade ESV: 2015
- Impala: 2015-2016 (New Style)
- Sierra 1500 / Denali 1500: 2015
- Sierra 2500 / 3500 / Denali 2500 / Denali 3500: 2015
- Silverado 1500 PICKUP: 2015
- Silverado 2500 / 3500 PICKUP: 2015
- Sonic: 2015-2018
- Suburban 1500: 2015
- Tahoe: 2015
- XTS: 2015
- Yukon / Yukon XL 1500: 2015
Frequently Asked Questions
How does the programming service work?
After you place your order, we will provide you with instructions to ship your original BCM to us. Once we receive it, our experts will transfer all the critical vehicle-specific data to the replacement module. We then ship the ready-to-install BCM back to you.
Is this a plug-and-play solution?
Yes, for over 95% of installations. Because we clone your original data, the new module is recognized by your vehicle’s other computers, eliminating the need for dealer programming. In some rare cases, a simple relearn procedure like for the airbag or brake pedal sensor may be needed.
Do I need to return my old BCM after installation?
No, there is no core charge for this part. We only need your original module for the initial data cloning process. You can keep it afterward.
Will this fix my truck’s no-start problem?
If the no-start is caused by the BCM failing to recognize your key or activating the anti-theft system, then yes, this will resolve the issue. A faulty BCM is a very common cause of security-related starting problems on these GM vehicles.
What if I have an airbag light on after I install it?
This is a normal possibility. It simply means the new BCM and the airbag module (SDM) need to be electronically introduced. A technician with a capable scan tool can perform the ‘Setup SDM Primary Key in BCM’ procedure in a few minutes to clear the light.