Fix Your Truck’s Electrical Headaches for Good
Is your 2013 GMC Sierra 2500 Pickup acting possessed? Flickering lights, a dead radio, power windows with a mind of their own, or an HVAC system that won’t cooperate are classic signs of a failing Body Control Module (BCM). As the central command for your truck’s body electronics, a faulty BCM can cause a cascade of frustrating and seemingly unrelated problems. This replacement BCM, corresponding to part number 25823558, is the definitive solution to restore order and reliability to your vehicle.
We take the guesswork and dealer expense out of the equation with our professional cloning service. Simply send us your original BCM, and we will transfer 100% of its critical data—including your truck’s specific VIN, security information, and optional features—to this replacement unit. The result is a truly plug-and-play module that requires no additional programming or expensive trips to the dealership. It will function identically to the original, only without the frustrating glitches.
Is Your Sierra Exhibiting These Electrical Gremlins?
- ✔ Unresponsive or erratic power windows, door locks, or interior/exterior lights.
- ✔ The air conditioning or heater blower motor works intermittently or not at all.
- ✔ An airbag warning light is illuminated on the dash, often with a diagnostic trouble code (DTC) like B1001.
- ✔ Strange security system behavior, including no-start conditions or random alarm activation.
- ✔ Communication errors with other modules, leading to a variety of DTCs.
- ✔ Intermittent stalling or grounding issues that are difficult to trace.
Case Study: A Tricky Diagnosis
I once had a 2013 Sierra 2500 HD in my bay that was driving the owner crazy. The radio would cut out, the dome light would flicker while driving, and occasionally the power locks wouldn’t respond. The owner had already replaced the battery and checked the main fuses. After hooking up my scanner, I saw a handful of U-codes (communication codes) pointing to a network issue. Instead of just replacing parts, we checked the main BCM ground first—a common weak point on these trucks. The ground was solid. This told me the issue was internal to the module itself. We performed a cloning service on a replacement BCM, and within 10 minutes of installation, every single ghost in his machine was gone. It’s a reminder that while grounds are a key checkpoint, these modules are a known failure point.
A Straightforward Guide to Installation
Replacing the BCM is a job most DIYers can handle in their own driveway. The key is our cloning service, which handles all the complex programming work for you beforehand.
- Safety First: Always disconnect the negative terminal from your truck’s battery before working on any electronics.
- Locate the BCM: On most GM trucks of this era, the BCM is located under the driver’s side of the dashboard, to the left of the steering column. You may need to remove a lower dash panel for access.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that need to be depressed. Once disconnected, unclip or unbolt the module from its mounting bracket.
- Install the New Module: Seat the replacement BCM into the mounting bracket and reconnect all the electrical harnesses. You’ll hear a click as they lock into place.
- Reconnect and Test: Reconnect the negative battery terminal. Start the truck and test all body functions: lights, wipers, locks, windows, and the HVAC system to confirm the repair.
- Post-Install Checks: In some cases, an airbag light may persist. This requires a professional scan tool to perform the ‘Setup SDM Primary Key in BCM’ function. A ‘Brake Pedal Position Relearn’ may also be needed. These are simple procedures for any well-equipped shop.
Verified Fitment for Your GM Truck or SUV
This BCM is a direct replacement for part number 25823558 and other interchangeable numbers. It is compatible with a wide range of General Motors vehicles. Please verify your model and year below. This part fits the following vehicles, among others:
ESCALADE & ESV & EXT 07-11
SIERRA 1500 PICKUP 07-11
SIERRA 2500 PICKUP 07-13
SIERRA 3500 PICKUP 07-13
SIERRA DENALI 07-13
SILVERADO 1500 PICKUP 07-11
SILVERADO 2500 PICKUP 07-13
SILVERADO 3500 PICKUP 07-13
SUBURBAN 1500/2500 07-11
TAHOE 07-11
YUKON & YUKON XL 1500/2500 07-11
Note: For 2007 models, this fits the ‘new style’ with the smooth door skin. Always match your part number for guaranteed compatibility. Interchangeable part numbers include: 25835966, 15263363, 15943678, 25790508, 25823558, 25844480, 20939137, 22860591 and more.
Frequently Asked Questions
Frequently Asked Questions
How does the cloning service work?
After you place your order, you will receive instructions on how to ship your original BCM to us. Our technicians will then extract the unique data from your module and flash it onto the replacement unit. We then ship both your original module and the ready-to-install replacement back to you.
What if my original module is completely dead or damaged?
In many cases, even if the module is non-functional, we can still retrieve the necessary data. If your module is physically destroyed (e.g., shattered, water-logged), please contact us before ordering to discuss options.
Will this fix my airbag light?
A faulty BCM is a common cause of an airbag light with code B1001. Replacing it will solve the root cause. However, as a safety protocol, you may need a scan tool to perform the ‘Setup SDM Primary Key in BCM’ function to clear the light after installation.
Do I need to return my old BCM as a core?
No core charge is required. Your original module is necessary for the cloning process and will always be returned to you along with the newly programmed replacement.
What kind of warranty is included?
This part comes with a one-year warranty, giving you peace of mind and confidence in your repair.