2002

Tired of Electrical Gremlins in Your GM Truck?

Are you chasing down bizarre electrical problems in your 2002 Chevy Avalanche or another GM truck from that era? Flickering interior lights, power windows with a mind of their own, a security light that randomly prevents you from starting the engine—these aren’t just annoyances; they’re classic signs of a failing Body Control Module (BCM). As the central command center for your vehicle’s body electronics, a faulty BCM can make your reliable truck feel unpredictable and unsafe.

I’ve spent over two decades diagnosing these exact issues. The BCM is the unsung hero that manages everything from your keyless entry and power locks to the interior dome lights and instrument cluster warnings. When it starts to fail, often due to age and heat cycles causing internal solder joints to crack, it sends confusing signals throughout the vehicle, leading to the frustrating symptoms you’re likely experiencing. This isn’t a problem that will fix itself; it requires a direct replacement.

The Easiest Way to Restore Your Truck’s Functionality

Forget expensive dealership visits and the hassle of finding a shop with the right programming tools. This 2002 Avalanche BCM arrives at your doorstep ready to install. We take your vehicle’s Vehicle Identification Number (VIN) at the time of purchase and flash the module with the latest, most stable software directly from GM. This ensures perfect compatibility and function right out of the box, saving you hundreds in programming fees and diagnostic time.

Is Your GM Truck Showing These Symptoms?

• ✔ Erratic or non-functional power windows and door locks.
• ✔ The security or anti-theft light stays on, causing a no-start condition.
• ✔ Interior dome lights or dashboard lights flicker or refuse to turn off.
• ✔ Horn honks randomly or doesn’t work at all.
• ✔ Keyless entry remote is unresponsive.
• ✔ False warnings appearing on the instrument cluster (e.g., “Door Ajar”).

A Straightforward Guide to Installation

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 Avalanche, Silverado, and Sierra, the BCM is located under the driver’s side of the dashboard, near the steering column. On vans like the Astro and Safari, it’s often behind the center dash panel.
3. Remove Connectors: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that need to be pressed to release. Do not force them.
4. Swap the Module: Unbolt or unclip the old BCM from its mounting bracket and remove it. Install the new, pre-programmed BCM in its place.
5. Reconnect Everything: Plug the electrical connectors firmly into the new module until they click into place. Reconnect the negative battery terminal.
6. Perform Final Setup: Follow the post-installation procedures below to sync the new BCM with your vehicle’s other systems.

CRITICAL: Post-Installation Procedures

After installing your new BCM, two final steps are required to ensure full functionality and safety. These are not optional and must be performed for a complete repair.

• Airbag System Sync: To clear the airbag warning light, a technician must perform the ‘Setup SDM Primary Key in BCM’ procedure using a bi-directional scan tool. This re-establishes the security handshake between the new BCM and the airbag system.
• Brake Pedal Position Sensor Relearn: Some vehicles may require a brake pedal position sensor recalibration. This ensures the brake lights and stability control systems function correctly with the new module.

Note: If you are a DIY installer without access to a high-level scan tool, many local repair shops can perform these two quick procedures for a minimal charge.

Will This Fit My Vehicle?

This BCM is a direct replacement for part numbers 15063578, 15081796, 15095334, 19208537, DKAK, and DPNU. It is guaranteed to fit the following GM models: