2013 Silverado 3500 BCM 20939137 | Cloning Service Included

Finally, a Real Fix for Your Truck’s Electrical Nightmares

Is your 2013 Silverado 3500 acting possessed? One minute the radio works, the next it’s dead. The windows won’t roll down, the security light is flashing, or the HVAC system has a mind of its own. These aren’t random glitches; they’re 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 hard-to-diagnose problems. This replacement BCM, equivalent to GM part number 20939137, is the definitive solution to restore order and reliability to your vehicle.

We make the repair process simple with our professional Cloning Service. Just send us your original module. We will expertly transfer all the critical data—including your vehicle’s specific settings and key information—to this replacement unit. The module you receive back will be 100% plug-and-play, with no need for an expensive trip to the dealership for programming. It’s the most efficient way to get your truck back to perfect working condition.

Is Your Silverado Showing These Symptoms?

A failing BCM can manifest in numerous ways. If you’re experiencing any of the following, it’s time to consider a replacement:

• ✔ Unresponsive power windows, door locks, or interior lights.
• ✔ HVAC controls not working or blower motor operating erratically.
• ✔ The airbag warning light is illuminated, often with a DTC B1001.
• ✔ Intermittent stalling, misfires, or no-start conditions related to the security system.
• ✔ Strange electrical behavior, like wipers turning on by themselves.
• ✔ A cluster of seemingly unrelated diagnostic trouble codes (DTCs).

A Straightforward Guide to Your BCM Installation

Replacing the 2013 Silverado 3500 BCM is a job most DIYers can handle in minutes. Our cloning service ensures you won’t need advanced programming tools for the basic install.

1. Safety First: Always disconnect the negative terminal from your truck’s battery before starting any electrical work.
2. Locate the Module: The BCM is typically found under the driver’s side dashboard, near the steering column. It’s a black box with multiple large electrical connectors.
3. Remove the Old Unit: Carefully disconnect all wiring harnesses. They have locking tabs, so be gentle. Once disconnected, unbolt or unclip the module from its mounting bracket.
4. Install the New Module: Seat the replacement module into the bracket and securely reconnect all wiring harnesses. You should hear a click as they lock into place.
5. Reconnect Power: Reattach the negative battery terminal. Turn the key to the ‘On’ position and test all functions—lights, locks, windows, wipers, and HVAC—to confirm the repair.

Important Post-Installation Note: In some cases, particularly if the airbag light was on, a professional scan tool may be needed to perform the ‘Setup SDM Primary Key in BCM’ function to sync the modules. A ‘Brake Pedal Position Relearn’ might also be required. Always consult a factory service manual for vehicle-specific procedures.

Verified Vehicle Compatibility List

This module is a direct replacement for part number 20939137 and other interchangeable numbers on a wide range of GM trucks and SUVs. Please verify your part number before ordering. This part fits:

Frequently Asked Questions About the 2013 Silverado 3500 BCM