Restore Your GM Truck’s Electrical System with a Plug-and-Play Solution
If you’re dealing with bizarre electrical issues in your 2002 Chevrolet Tahoe or another compatible GM vehicle, a failing Body Control Module (BCM) is often the culprit. I’ve seen it hundreds of times in the shop: power windows with a mind of their own, security lights that won’t turn off, or interior lights that flicker for no reason. These aren’t just annoyances; they’re signs that the central nervous system of your vehicle’s electronics is failing. This replacement BCM is your direct, reliable solution, arriving at your door pre-programmed with the latest GM software specifically for your vehicle’s VIN. Forget expensive dealership visits and programming fees—this module is designed to get you back on the road with minimal hassle.
A Technician’s Notebook: The Tahoe with a Ghost
A customer brought in a 2002 Tahoe with a laundry list of complaints: the radio would cut out, the power locks would cycle while driving, and the security light was always on, sometimes causing a no-start condition. He had already replaced the battery and checked the grounds, but the problems persisted. After hooking up the scan tool, I saw a dozen communication error codes (U-codes) pointing to a network failure. The common link? The BCM. A failing BCM can broadcast junk data across the vehicle’s network, causing other modules to act erratically. We installed a VIN-programmed 2002 Tahoe BCM, and instantly, all the ghost-like electrical problems vanished. It’s a classic failure on these platforms, and a properly programmed module is the only correct fix.
Is Your GM Vehicle Showing These Symptoms?
- ✔ Intermittent or non-working power windows, door locks, or mirrors.
- ✔ The security or anti-theft light stays illuminated, potentially causing a no-start.
- ✔ Erratic interior or exterior lighting behavior (lights staying on or not turning on).
- ✔ Gauges on the instrument cluster behaving erratically or not working at all.
- ✔ Communication error codes stored, such as U0140, U0155, or other U-series codes.
- ✔ Radio or climate control systems functioning incorrectly.
- ✔ False warnings on the driver information center.
A Straightforward Guide to Installation
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- ✔ Locate the BCM: On most compatible trucks and SUVs like the 2002 Tahoe, the BCM is located under the driver’s side of the dashboard, near the steering column. It’s a black plastic box with several large multi-pin connectors.
- ✔ Remove the Old Module: 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 BCM: Mount your new, pre-programmed BCM into the same location. Securely reconnect all the electrical connectors, ensuring they click into place.
- ✔ Perform Relearns (If Necessary): As noted below, some vehicles may require a ‘Setup SDM Primary Key’ or ‘Brake Pedal Position Relearn’ procedure if specific warning lights are on. This typically requires a bi-directional scan tool.
Important Post-Installation Information
While this 2002 Tahoe BCM is a plug-and-play part, some vehicle systems may need to be re-synced after installation. There is no core charge, so you can keep your original part. Please be aware of the following potential procedures:
- 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’ function. This syncs the new BCM with the airbag module.
- Brake Pedal Position Relearn: On some models, the brake pedal position sensor may need to be recalibrated to ensure correct brake light operation and to prevent issues with the traction control system.
Disclaimer: Vehicle systems vary. We always recommend consulting a factory service manual or a certified technician if you are unsure about any step.
Verified Vehicle Compatibility
This Body Control Module is a direct replacement for part numbers 15063578, 15081796, 15095334, 19208537, DKAK, and DPNU. It is guaranteed to fit the following GM models and years:
Frequently Asked Questions
Why do you need my VIN?
Your Vehicle Identification Number (VIN) allows us to program the BCM with the exact software and settings your specific vehicle left the factory with, including any GM-released updates. This ensures compatibility and proper function of all your vehicle’s features.
Is this part difficult to install?
For someone with basic mechanical skills, the physical installation is straightforward. It involves disconnecting the battery, accessing the module under the dash, and swapping the units. The key benefit of our service is that the complex software programming is already done for you.
Do I need to send my old BCM back?
No. We do not require you to return your original module. There is no core charge associated with this purchase.
What tools are needed for the post-installation procedures?
The Airbag System Sync and Brake Pedal Position Relearn procedures, if required, must be performed with a professional-grade bi-directional scan tool (like a Tech 2, Snap-on, or Autel). Most basic code readers cannot perform these specific functions.
Will this fix my ‘Service 4WD’ light?
While a BCM can cause a wide range of issues, a ‘Service 4WD’ message is more commonly related to the Transfer Case Control Module (TCCM), the encoder motor, or the dash switch. It’s best to diagnose that specific system first.