2002

Restore Your Truck’s Brain and End Electrical Nightmares

Are you chasing electrical gremlins in your 2002 GMC Sierra or another GM truck? Flickering lights, power windows with a mind of their own, a security light that won’t turn off, or even a frustrating no-start condition can all point to one culprit: a failing Body Control Module (BCM). As the central hub for your vehicle’s body electronics, when the BCM goes bad, it can create a cascade of confusing and unpredictable problems. Stop throwing parts at the issue. This is the direct, reliable solution you’ve been looking for.

This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take the hassle and expense out of the repair by pre-programming this BCM to your truck’s specific Vehicle Identification Number (VIN) before it ever leaves our facility. This means no costly trips to the dealership for programming. You get a module loaded with the latest GM software updates, ensuring optimal performance and compatibility right out of the box. This is the most efficient way to get your truck back to 100% functionality.

Is Your Truck Showing These Symptoms?

• ✔ Intermittent or non-working power windows, door locks, or mirrors.
• ✔ Erratic interior or exterior lighting (flickering, staying on, or not working at all).
• ✔ A security or anti-theft light that stays on, preventing the engine from starting.
• ✔ Gauges on the instrument cluster behaving erratically or not working.
• ✔ The radio or climate control system turning on or off randomly.
• ✔ False warnings on the driver information center (e.g., “Service 4WD”).

A Straightforward Guide to Installation

Replacing the 2002 Sierra BCM is a manageable job for a confident DIYer. While the exact location can vary slightly by model, it’s typically found under the driver’s side of the dashboard.

1. Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
2. Locate the BCM: On most Sierra/Silverado models, it’s located under the steering column, often attached to a metal bracket. On vans like the Astro/Safari, it may be in the center dash area.
3. Remove Connectors: Carefully unplug the multiple wiring harness connectors from the old BCM. They have release tabs that need to be pressed. Do not force them.
4. Swap the Module: Unbolt or unclip the old BCM from its mounting location and remove it. Install the new, pre-programmed BCM in its place.
5. Reconnect Everything: Plug all wiring harnesses back into the new BCM. They are color-coded and keyed to only fit in the correct socket. Reconnect the negative battery terminal.
6. Perform Final Steps: Follow the critical post-installation procedures below to ensure all systems, especially safety features, are working correctly.

CRITICAL: Post-Installation Procedures

After installing your new BCM, two final steps are often required to ensure full system integration and safety. Failure to perform these may result in warning lights or improper function.

• Airbag System Reset: An airbag warning light is common after a BCM swap. You must perform the ‘Setup SDM Primary Key in BCM’ procedure with a compatible high-level scan tool to sync the BCM with the airbag system and clear the light.
• Brake Pedal Position Sensor Relearn: Some vehicles may require a brake pedal position sensor relearn or recalibration. This ensures the brake lights and stability control systems function correctly.

Will This Fit My Vehicle?

This module is a direct replacement for a wide range of GM trucks and vans. Please verify your vehicle and part number below. This unit replaces part numbers: 15063578, 15081796, 15095334, 19208537, DKAK, DPNU.

This is the definitive solution for your vehicle’s electrical issues. By ordering a pre-programmed 2002 Sierra BCM, you’re not just buying a part—you’re buying peace of mind and a straightforward path back to a reliable ride.