Programmed 2002 Sierra BCM Body Control Module 15063578

Tired of Your Truck’s Unpredictable Electronics?

As a technician with over two decades of experience under the hood, I’ve seen it all. If your 2002 GMC Sierra or a similar GM truck is acting possessed—with flickering lights, a dead instrument cluster, power locks with a mind of their own, or a security light that prevents it from starting—the culprit is very often a failing Body Control Module (BCM). This isn’t just an annoyance; it’s the central hub for your vehicle’s comfort and security features, and when it goes, it can bring your entire truck to a standstill.

You’re looking at the definitive, hassle-free solution. This is a direct-replacement BCM, part number 15063578, that arrives at your door pre-programmed with the latest GM software specifically for your vehicle. All we need is your VIN. This single step eliminates the need for expensive dealership programming, saving you time, money, and the headache of towing your truck to a service center. We handle the complex part so you can get back to what matters: a reliable vehicle.

Is Your Truck Showing These Symptoms?

A failing BCM can cause a wide range of confusing electrical problems. Here are some of the most common signs I’ve diagnosed in my shop:

• ✔ Intermittent or non-functional power windows, door locks, or mirrors.
• ✔ Gauges on the instrument cluster behaving erratically or not working at all.
• ✔ Headlights, taillights, or interior lights flickering, staying on, or not turning on.
• ✔ The security or anti-theft light is on, often causing a no-start condition.
• ✔ Diagnostic trouble codes related to lost communication, such as U0140.
• ✔ Radio or climate control malfunctions.

Your Step-by-Step BCM Installation Guide

Installing your programmed 2002 Sierra BCM is a straightforward job for a confident DIYer. The module is typically located under the driver’s side of the dashboard. Always prioritize safety and take your time.

1. Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
2. Locate the BCM: On most trucks like the Sierra and Silverado, you’ll find it under the steering column, often attached to a metal bracket. On vans like the Astro and Safari, it’s usually behind the center dash.
3. Remove Trim Panels: Carefully remove any plastic trim panels necessary to gain clear access to the module.
4. Disconnect and Remove: Unplug the electrical connectors. They have locking tabs that need to be depressed. Once disconnected, unbolt the old BCM from its mounting location.
5. Install the New Module: Bolt the new, pre-programmed BCM into place and securely reconnect all electrical connectors.
6. Reconnect and Test: Reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all related functions—power windows, locks, lights, and gauges—before starting the engine.

Note on Post-Installation Steps: In some cases, additional procedures like an Airbag System Sync or Brake Pedal Position Relearn may be needed. This is vehicle-dependent. If an airbag light appears, a professional scan tool is required to sync the new BCM with the SDM (airbag module).

Verified Fitment for Your GM Vehicle

This BCM is a direct replacement for a wide range of GM trucks and vans. It is compatible with part numbers 15063578, 15081796, 15095334, 19208537, DKAK, and DPNU. Please verify the part number on your original module or confirm your vehicle is on the list below.