Restore Your Truck’s Electrical System with a Reliable, Programmed BCM
Are you chasing down frustrating electrical gremlins in your 2002 GM truck or van? Intermittent power windows, door locks that have a mind of their own, a security light that won’t turn off, or dashboard lights flickering for no reason are 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 daily drive a nightmare. Stop throwing parts at the problem and get a definitive solution.
This isn’t just a replacement part; it’s a fully integrated solution. We take the biggest hassle out of the repair by pre-programming this BCM to your truck’s specific Vehicle Identification Number (VIN) before it ships. This means you get the latest GM software updates and avoid a costly and time-consuming trip to the dealership for programming. This is the most direct path to getting your vehicle back to 100% functionality.
A Technician’s Notebook
I remember a 2002 Sierra 2500 that came into the shop with a bizarre complaint: the radio would turn on by itself, and the interior dome light would flicker while driving. The owner had already replaced the battery and checked the grounds. After hooking up the scan tool, I saw no communication codes with the BCM. From experience, this often points to an internal failure of the module itself, not a wiring issue. We installed a VIN-programmed BCM, and all the ghost-like electrical issues vanished instantly. It’s a common failure point on these GMT800 platform trucks, and a properly programmed module is the only correct fix.
Is Your GM Truck or Van Showing These Symptoms?
A failing BCM can cause a wide range of issues. If you’re experiencing any of the following, this module is the likely solution:
- ✔ Power windows, mirrors, or door locks not working or operating erratically.
- ✔ The security or anti-theft light stays on, preventing the engine from starting.
- ✔ Interior or exterior lights flickering, staying on, or not turning on at all.
- ✔ The horn honking unexpectedly or not working when pressed.
- ✔ Inconsistent instrument panel gauge operation or warning lights.
- ✔ Communication-related Diagnostic Trouble Codes (DTCs), such as U-series codes, stored in other modules.
A Straightforward Guide to Installation
Replacing your 2002 Sierra BCM is a manageable job for a DIYer with basic tools. Because we handle the programming, you can focus on the physical swap.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on any electronic components.
- Locate the BCM: On most 2002 GM trucks and SUVs (like the Sierra, Silverado, Tahoe, Yukon), the BCM is located under the driver’s side of the dashboard, near the steering column. On vans (Astro, Safari) and S-series trucks, it’s often behind the center dash.
- Remove Trim Panels: You may need to remove the lower dash panel or knee bolster to gain clear access to the module.
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs that must be depressed. Once disconnected, unbolt the old BCM from its mounting bracket.
- Install the New BCM: Bolt the new, pre-programmed BCM into place and securely reconnect all electrical connectors. Ensure they click into place.
- Reconnect Battery & Test: Reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all body functions—windows, locks, lights, etc.
Important Post-Installation Steps
In some cases, additional vehicle-specific relearn procedures may be necessary after installation. These are not signs of a faulty part but are standard GM security and safety handshakes between modules.
- Airbag System Sync: If your airbag warning light is on after installation, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure. This syncs the new BCM with the airbag system.
- Brake Pedal Position Relearn: Some models may require a brake pedal position sensor relearn to ensure proper brake light and traction control operation.
Will This Fit My Vehicle?
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 Chevrolet Astro / GMC Safari
- 2002-2005 Chevrolet Blazer S10 / GMC Jimmy S15
- 2002-2004 Chevrolet S10 / GMC Sonoma
- 2002 Chevrolet Avalanche 1500 (4×2)
- 2002 Cadillac Escalade (4×2)
- 2002 Chevrolet Silverado & GMC Sierra 1500, 2500, 3500 Pickup
- 2002 GMC Sierra Denali
- 2002 Chevrolet Suburban 1500 (4×2), 2500
- 2002 Chevrolet Tahoe (4×2)
- 2002 GMC Yukon (4×2)
- 2002 GMC Yukon XL 1500 (4×2), 2500
Please provide your VIN upon purchase to ensure we program the correct software for your vehicle’s specific options.
Frequently Asked Questions
Do I need to send my old BCM back?
No. There is no core charge for this part. You can keep your original module.
Is this part difficult to install?
The physical installation is straightforward for someone with basic mechanical skills. The most difficult part, programming, is already done for you. Most installations take less than an hour.
What does ‘VIN Programmed’ actually mean?
It means we load the module with the specific GM factory software that matches your vehicle’s exact features (like power seats, keyless entry, etc.) using your VIN. This makes it a true plug-and-play solution and avoids a trip to the dealer.
My airbag light is on after installing. Is the part bad?
No, this is normal for some vehicles. The new BCM needs to be electronically ‘introduced’ to the airbag module (SDM). This requires a ‘Setup SDM Primary Key in BCM’ procedure with a professional-grade scan tool.
How do I provide my VIN?
After you complete your purchase, you will receive instructions on how to send us your vehicle’s 17-digit VIN. We cannot ship the part until we receive this information.