Restore Your Truck’s Electrical Stability and Ditch the Gremlins
Are you chasing bizarre electrical issues in your 2002 Chevy Tahoe or other GM truck? One minute the power windows work, the next they don’t. The security light flashes for no reason, or worse, your truck refuses to start intermittently. As a technician with over two decades of experience, I’ve seen these exact symptoms hundreds of time. The culprit is almost always a failing Body Control Module (BCM), the central hub for your vehicle’s body electronics.
A failing BCM can make your reliable truck feel haunted. This isn’t just an annoyance; it can affect security and convenience features you rely on daily. Instead of paying for expensive diagnostic time and dealership programming fees, we offer a direct, reliable solution. This BCM is professionally programmed with the latest GM software updates specifically for your vehicle’s VIN, ensuring it works correctly right out of the box.
Case Study: A Tricky Diagnosis
I remember a 2002 GMC Sierra that came into my shop with a laundry list of complaints: the radio would turn on and off, the dome light wouldn’t work, and the power locks were unresponsive. The owner had already replaced the battery and checked all the fuses. A scan showed a loss of communication code (U1000) that would come and go. After tracing the wiring, we isolated the issue to the BCM itself. Internal circuit board corrosion, likely from years of humidity, was causing these ghost-like problems. We replaced it with a VIN-programmed module, and all the issues vanished instantly. This is a classic failure scenario for these otherwise tough trucks.
Common Signs of a Failing GM BCM
- ✔ Erratic or non-functional power windows, door locks, and mirrors.
- ✔ Interior or exterior lights not working correctly or staying on.
- ✔ The security system acting up, causing a no-start condition (Security light on).
- ✔ Horn honking unexpectedly or not working at all.
- ✔ Communication Diagnostic Trouble Codes (DTCs) like U1000, U1016, or B-series codes stored in the system.
- ✔ Wipers behaving erratically or not parking in the correct position.
Your Straightforward BCM Installation Guide
Replacing the BCM is a manageable job for a DIYer. This pre-programmed module for your 2002 Tahoe BCM eliminates the most difficult step: the software flashing. Follow these steps for a smooth installation.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes before starting work.
- Locate the BCM: On most trucks and SUVs like the Tahoe and Silverado, the BCM is located under the driver’s side of the dashboard, often near the steering column. On vans like the Astro and Safari, it’s typically behind the center dash area.
- Remove Trim Panels: You may need to remove the lower dash knee bolster or other plastic trim panels to gain clear access to the module.
- Disconnect and Remove: Carefully unplug the 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 in the same location and securely plug in all the electrical connectors. You should hear a click as they lock into place.
- Reconnect and Test: Reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all body functions—windows, locks, lights, wipers, etc.—to confirm the repair.
Post-Installation Notes
In some cases, additional steps with a high-level scan tool may be required:
- Airbag Light: If the airbag (SRS) warning light is on after installation, a ‘Setup SDM Primary Key in BCM’ procedure is needed to sync the new BCM with the airbag system.
- Brake System: A ‘Brake Pedal Position Relearn’ may be necessary on certain models to ensure correct operation of the brake lights and traction control system.
Will This Fit My GM 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:
Frequently Asked Questions
How do I provide my VIN for programming?
After completing your purchase, simply reply to your order confirmation email with your vehicle’s 17-digit VIN. We cannot ship your part until we receive this information.
Is this BCM truly plug-and-play?
Yes, for 99% of installations. We program it to your VIN so it communicates with your truck’s existing components. In rare cases, as noted above, a relearn procedure for the airbag or brake sensor may be needed, which requires a scan tool.
Do I need to return my old BCM?
No. There is no core charge for this part. You can keep your original module.
Will this fix my ‘Security’ light and no-start problem?
A faulty BCM is a very common cause of security system issues on these GM vehicles. Replacing it with this pre-programmed unit is a highly effective way to resolve those specific symptoms.
What if the part number on my old module is slightly different?
This module replaces several part numbers, including 15063578, 15081796, and DPNU. As long as your original part number is on our cross-reference list, this module will function correctly in your vehicle.