If your 2015 Sierra 3500 is starting to feel like it’s haunted by electrical gremlins—flickering dash lights, power windows with a mind of their own, or a security light that won’t turn off—you’re not alone. These frustrating and seemingly unrelated issues often point to one central component: a failing Body Control Module (BCM). As the nerve center for your truck’s body electronics, a faulty BCM can cause widespread chaos. The dealership solution often involves expensive diagnostics, a new module, and costly programming fees. We offer a smarter, more direct path back to reliability.
This is a fully programmed BCM, ready for installation. Our professional cloning service makes this repair straightforward. Simply send us your original BCM, and we will transfer all the critical vehicle-specific data—including VIN, mileage, and options—to this replacement unit. We then ship it back to you, completely plug-and-play. You get to skip the hassle and expense of dealership programming and get your truck working correctly again.
Is Your Truck Showing These Symptoms?
A failing BCM can manifest in numerous ways. From my 20+ years of experience, these are the most common signs that your body control module needs attention. If you’re experiencing several of these, it’s a strong indicator that the BCM is the root cause.
- ✔ Erratic or non-functional interior and exterior lights (headlights, dome lights, dash lights).
- ✔ Power windows, door locks, or mirrors working intermittently or not at all.
- ✔ The anti-theft or security system light stays on, potentially causing a no-start condition.
- ✔ The horn honking unexpectedly or not working when pressed.
- ✔ Wipers activating on their own or failing to operate.
- ✔ Diagnostic trouble codes (DTCs) related to communication loss with other modules (U-codes like U0140, U0155).
A Technician’s Notebook
I remember a 2015 Silverado 2500 (which uses the same BCM) that came into the shop last year. The owner was frustrated because he’d already replaced the battery and checked all the fuses. His main complaints were that the radio would sometimes not turn on, and the passenger-side power window wouldn’t work. A quick scan showed a handful of communication codes. Instead of chasing electrical ghosts for hours, we identified the BCM as the weak link in the communication network. With a cloned BCM, we had him back on the road in under an hour for a fraction of the dealership’s quote. It’s often the simplest fix for the most confusing problems.
The Solution: A Programmed 2015 Sierra 3500 BCM
Don’t let a faulty module keep your truck down. Our service is designed to be the most efficient solution available. By cloning your original data, we ensure the replacement BCM integrates seamlessly with your truck’s existing systems. This process maintains all your factory settings and avoids the conflicts that can arise from installing a blank or incorrectly programmed module. Plus, with no core charge, you can keep your original part.
A Straightforward Guide to BCM Installation
For the confident DIYer or professional mechanic, swapping the BCM is a manageable job. The location can be under the steering column or on the driver’s side firewall, depending on your specific model.
- Safety First: Always disconnect the negative terminal from your truck’s battery and wait a few minutes before beginning work.
- Locate the BCM: On most Sierra/Silverado models, it’s located under the driver’s side of the dashboard, near the steering column. You may need to remove a lower dash panel for access.
- Disconnect the Connectors: Carefully release the locking tabs on the electrical connectors and pull them straight out from the module. There will be several, so take note of their orientation.
- Remove the Old Module: Unbolt or unclip the original BCM from its mounting bracket.
- Install the New Module: Mount your new, programmed BCM in the same location and securely reconnect all electrical connectors.
- Reconnect the Battery: Reattach the negative battery terminal. Your truck is now ready to start.
Important Post-Installation Information
While our programming makes this a plug-and-play repair, some vehicle systems may require a ‘handshake’ with the new BCM. Please be aware of the following:
- Airbag System Sync: If the airbag warning 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 systems and clear the light.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration might be necessary to ensure correct brake light and traction control operation.
Disclaimer: Vehicle systems vary. Always refer to a factory service manual or consult with a qualified technician if you are unsure about any procedure.
Verified Vehicle Compatibility
This module is a direct fit for the following vehicles, matching part numbers 13594692, 13594768, 13593214, 13580690, 13591519, or 13594769. Please verify your part number or consult the list below.
- ATS 14 Body Control (BCM); (on firewall)
- CAPRICE 14-17 Body Control (BCM)
- CORVETTE 14 Body Control (BCM); (LH dash)
- CTS 14 Body Control (BCM); Sdn, VIN A (4th digit, New Style), (LH dash)
- ESCALADE / ESCALADE ESV 15 Body Control (BCM); (under steering column), w/o model year break point
- IMPALA 15-16 Body Control (BCM); VIN 1 (4th digit, New Style), (LH dash), ID 13594692
- IMPALA 17-19 Body Control (BCM); (LH Dash)
- SIERRA 1500 PICKUP 14 Body Control (BCM); (under steering column)
- SIERRA DENALI 1500 14 Body Control (BCM); (under steering column)
- SIERRA 2500 / 3500 PICKUP 15 Body Control (BCM); (LH firewall), ID 13594692
- SIERRA DENALI 2500 / 3500 15 Body Control (BCM); (under steering column), ID 13594692
- SILVERADO 1500 PICKUP 14 Body Control (BCM); (under steering column)
- SILVERADO 2500 / 3500 PICKUP 15 Body Control; (under steering column), ID 13594692
- SS CAPRICE 14-17 Body Control (BCM)
- SUBURBAN 1500 15 Body Control (BCM); (under steering column), w/o model year break point
- TAHOE 15 Body Control (BCM); (under steering column), w/o model year break point
- XTS 14 Body Control (BCM); (left front hinge pillar)
- YUKON / YUKON XL 1500 15 Body Control (BCM); (under steering column), w/o model year break point
How does the programming service work?
How does the programming service work?
After you place your order, we will contact you with instructions to ship your original BCM to us. Once we receive it, our technicians will extract the vehicle-specific data and transfer it to the replacement module. We then ship the newly programmed module back to you, ready for installation.
Do I need a dealership to install this BCM?
No. Because we have already programmed the module by cloning your original, it is a plug-and-play installation. This process eliminates the need for a trip to the dealership for expensive programming.
Is this a guaranteed fix for my truck’s electrical problems?
This BCM will fix problems directly caused by a faulty Body Control Module. The symptoms listed above are strong indicators of BCM failure. However, proper vehicle diagnosis is always recommended, as other issues like bad wiring or grounds can cause similar symptoms.
What if my original BCM is completely dead or missing?
If your original module is non-communicative or lost, we may still be able to help. In some cases, we can program a module using your vehicle’s VIN. Please contact us before ordering to discuss your specific situation.
Do I need to return my old BCM?
You only need to send your original BCM to us for the initial data cloning service. There is no core charge, and you do not need to send it back to us after you receive your programmed replacement. You are free to keep your original module.