Fix Your Truck’s Electrical Gremlins for Good

If you’re chasing strange electrical problems in your 2007-2013 GM truck or SUV, you’re not alone. One day the radio acts up, the next the power windows won’t work, and the dashboard is lit up with warning lights. As a technician with over 20 years of experience, I’ve seen these exact issues hundreds of times. The culprit is almost always a failing Body Control Module (BCM), the central command center for your vehicle’s electronics. This OEM-quality replacement, part number 15263363, is the definitive solution to restore full functionality and peace of mind to your vehicle.

The biggest hurdle with BCM replacement has always been the expensive and time-consuming trip to the dealership for programming. We eliminate that step entirely. With our professional Cloning Service, we transfer the exact data from your original module to this replacement unit. When it arrives, it’s a true plug-and-play part, perfectly matched to your truck’s VIN and options. This service ensures your 2013 Silverado 3500 BCM will work correctly right out of the box.

Is Your GM Truck Showing These Symptoms?

A failing BCM can cause a wide range of frustrating and seemingly unrelated problems. If your vehicle is experiencing any of the following, a faulty BCM is the likely cause:

• ✔ Intermittent or non-functional power windows, door locks, or interior lights.
• ✔ HVAC blower motor or climate controls not working correctly.
• ✔ Airbag warning light is on, often with Diagnostic Trouble Code (DTC) B1001.
• ✔ The security system acts up, causing no-start conditions or random alarm activation.
• ✔ Unexplained battery drain when the vehicle is off.
• ✔ Communication issues between various electronic modules, triggering codes like U0100.
• ✔ Erratic wiper operation or exterior lighting failures.

From the Diagnostic Bay: The Case of the Haunted Truck

A Straightforward Guide to BCM Replacement

One of the best parts about this repair is its simplicity. You don’t need a vehicle lift or complex tools. For most DIYers and professionals, the job takes less than 15 minutes.

1. Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on any electronics.
2. Locate the BCM: On most GM trucks and SUVs from this era, the BCM is located under the driver’s side of the dashboard, near the steering column. It’s a black box with several large electrical connectors.
3. Remove the Old Module: Carefully unplug the electrical connectors. They have locking tabs that need to be depressed. Once unplugged, the module can be unclipped or unbolted from its bracket.
4. Install the New Module: Seat your cloned replacement BCM into the mounting bracket and firmly reconnect all electrical connectors. You’ll hear a ‘click’ when they are properly seated.
5. Reconnect and Test: Reconnect the battery terminal. Start the vehicle and test all functions: lights, locks, windows, wipers, and HVAC to confirm the repair was successful.

Important Post-Installation Note: In some cases, particularly if the airbag light was on (DTC B1001), you may need a professional scan tool to perform the ‘Setup SDM Primary Key in BCM’ function. This re-syncs the new BCM with the airbag system. A Brake Pedal Position relearn may also be required on certain models.

Verified Vehicle Compatibility

This module is a direct replacement for part number 15263363 and other interchangeable numbers on a wide range of General Motors vehicles. Please verify your part number or contact us to ensure a perfect match for your specific truck or SUV.

This list is a general guide. Some 2007 models require the ‘new style’ (smooth door skin) body type. Always confirm fitment by part number.