Restore Your Truck’s Electrical System with a Reliable BCM
Are you chasing down frustrating electrical gremlins in your 2002 Chevrolet Avalanche 1500? Flickering interior lights, power windows with a mind of their own, or a security light that prevents your truck from starting can all point to a failing Body Control Module (BCM). As the central hub for your vehicle’s body electronics, a faulty BCM can cause a cascade of confusing issues. This isn’t just an inconvenience; it can affect your vehicle’s security and daily usability. In my 20+ years as a technician, I’ve seen how a failing BCM can mimic problems with batteries, alternators, and individual switches, leading to expensive and incorrect repairs.
This is your direct-fit, dependable solution. We provide a fully tested Body Control Module, part number 15081796, that comes programmed to your truck’s specific Vehicle Identification Number (VIN). This critical step ensures seamless communication with your vehicle’s other electronic systems right out of the box. Simply provide us with your VIN after purchase, and our experts will flash the module with the latest GM software updates. This eliminates the need for a costly trip to the dealership for programming, saving you both time and money. With this module, you’re not just buying a part; you’re getting a complete, ready-to-install fix for your 2002 Avalanche 1500 BCM.
A Technician’s Notebook
I remember a 2002 Sierra that came into the shop with a classic “no-crank” condition. The owner had already replaced the battery and starter. The security light was flashing, a tell-tale sign of a Passlock anti-theft system issue, which is controlled by the BCM on these GM trucks. After confirming power and ground at the module, we knew the internal logic had failed. Swapping in a VIN-programmed BCM like this one had the truck running in under 30 minutes. It’s a prime example of how targeting the right component first saves hundreds in unnecessary parts and labor.
Is Your Truck Showing These Symptoms?
- ✔ Intermittent or non-functional power windows, door locks, or mirrors.
- ✔ Erratic interior or exterior lighting behavior (flickering, staying on, or not working at all).
- ✔ The security or anti-theft light is illuminated, often causing a no-start condition.
- ✔ The radio or instrument cluster display works intermittently.
- ✔ False warnings on the driver information center (e.g., “door ajar”).
- ✔ Communication error codes, such as U-series codes (e.g., U0140), stored in other modules.
- ✔ Horn honking unexpectedly or not working when pressed.
Your Straightforward BCM Installation Guide
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait about 10 minutes to allow all modules to power down completely.
- Locate the BCM: On most 2002 GM trucks and SUVs like the Avalanche, the BCM is located under the driver’s side of the dashboard, often near the steering column. It’s a black plastic box with several large multi-pin electrical connectors.
- Disconnect and Remove: Carefully unplug all electrical connectors. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the old BCM from its mounting bracket.
- Install the New Module: Mount your new, pre-programmed BCM in the same location. Firmly reconnect all the electrical connectors, ensuring each one clicks securely into place.
- Reconnect Power: Re-attach the negative battery terminal.
- Perform Final Procedures: Turn the key to the ‘ON’ position and check for proper function of lights and accessories. As noted below, certain relearn procedures may be necessary depending on your vehicle’s configuration.
Important Post-Installation Notes: While this 2002 Avalanche 1500 BCM is programmed for a plug-and-play installation, some vehicles may require additional steps to sync all systems. These may include:
- Airbag System Sync: If the airbag warning light is on after installation, a ‘Setup SDM Primary Key in BCM’ procedure is needed. This requires a professional-grade scan tool to sync the new BCM with the airbag module.
- Brake Pedal Position Relearn: On some models, a recalibration of the brake pedal position sensor may be necessary to ensure correct brake light and traction control operation.
Verified Vehicle Compatibility
This module is a direct replacement for part numbers 15063578, 15081796, 15095334, 19208537, DKAK, and DPNU. It is guaranteed to fit the following vehicles:
2002-2005 ASTRO / SAFARI (center dash)
2002-2005 BLAZER S10 / JIMMY S15 (center dash)
2002-2004 S10 / S15 / SONOMA (center dash)
2002 SILVERADO & SIERRA 1500/2500/3500 PICKUP (under steering column)
2002 TAHOE / YUKON (4×2, under steering column)
2002 SUBURBAN 1500/2500 (under steering column)
2002 YUKON XL 1500/2500 (under steering column)
2002 ESCALADE (4×2, under steering column)
2002 SIERRA DENALI (under steering column)
Frequently Asked Questions
Do I really need to provide my VIN?
Yes, absolutely. Providing your VIN is the most critical step. We use it to load the correct GM software and vehicle-specific options into the BCM. This ensures it communicates properly with your engine computer, instrument cluster, and other systems, making the installation process as smooth as possible.
Is any additional programming required after I install it?
For most functions, no. The main programming is done before we ship it. However, as mentioned, specific relearn procedures like the airbag system sync or brake pedal position relearn might be necessary. These are not full programming but rather synchronization steps that may require a capable scan tool.
What is a core charge? Do I need to send my old part back?
There is no core charge for this part. You can keep your original module without needing to send it back to us, saving you the hassle and expense of return shipping.
Will this fix my truck’s security light and no-start problem?
If the Body Control Module is the cause of the Passlock anti-theft system failure, then yes, this pre-programmed module is the correct solution. A flashing security light is one of the most common symptoms of a failed BCM in these GM vehicles.
Where is the BCM located on my 2002 Avalanche?
On the 2002 Avalanche 1500, the BCM is typically found under the driver’s side dashboard, mounted near the steering column. You will see several large wiring harnesses plugged into it.