Restore Full Functionality to Your GM Truck or SUV
Are you dealing with frustrating electrical problems in your 2002 GM truck or SUV? Flickering interior lights, power windows and locks with a mind of their own, or a security system that prevents your vehicle from starting are all classic signs of a failing Body Control Module. As the central command for your vehicle’s body electronics, a faulty BCM can cause chaos. This isn’t just an annoyance; it can be a significant reliability issue. This replacement Body Control Module, part number 15081857, is the definitive solution to get your truck back to operating as it should.
We take the guesswork and high cost out of the repair. Unlike going to a dealership, this module arrives at your door pre-programmed with the latest GM software, specifically matched to your vehicle’s VIN. This means you can bypass the expensive programming fees and long wait times. Simply provide us with your VIN after purchase, and we’ll handle the complex part, ensuring a smoother installation process for you.
From the Diagnostic Bay: The Case of the Confused Tahoe
I once had a 2002 Tahoe in my shop that was driving the owner crazy. The radio would turn on by itself, the dome lights would flicker while driving, and occasionally, the security light would flash, causing a no-start. The owner had already replaced the battery and checked the alternator. After hooking up my scan tool, I saw multiple U-codes (communication errors) pointing to a network issue. On these GMT800 platforms, the BCM is the hub. After a quick inspection of the original BCM revealed no obvious damage, we swapped in a VIN-programmed module. Every single electrical gremlin vanished. It’s a common failure point I’ve seen hundreds of times, and a reliable replacement like this 2002 Yukon XL 1500 BCM is the correct fix.
Is Your Truck Exhibiting These BCM Failure Symptoms?
If you’re experiencing any of the following, a failing BCM is the likely culprit. A bad Body Control Module can often trigger communication-related Diagnostic Trouble Codes (DTCs), such as U0140, U0155, or U0164.
- ✔ Erratic or non-functional power windows, door locks, and mirrors.
- ✔ Interior or exterior lights flickering, staying on, or not working at all.
- ✔ The anti-theft or security system light is illuminated, causing a no-start condition.
- ✔ Inaccurate readings on the instrument cluster gauges.
- ✔ Horn honking randomly or not working when pressed.
- ✔ “Service 4WD” or other warning messages appearing on the driver information center.
Your Step-by-Step BCM Replacement Guide
Installing your new 2002 Yukon XL 1500 BCM is a straightforward job for a confident DIYer or any professional mechanic. The module is typically located under the driver’s side of the dashboard, near the steering column.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes before beginning work.
- Locate the BCM: On most of these models, you’ll find it mounted to a bracket under the steering column. You may need to remove a lower dash panel for access.
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs that need to be depressed. Once disconnected, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed BCM into place and securely reconnect all electrical connectors. Ensure they click into place.
- Reconnect Power: Reattach the negative battery terminal.
- Perform Final Procedures: Start the vehicle. Check for any warning lights. If the airbag light is on or brake functions seem off, follow the post-installation procedures noted below.
Important Post-Installation Information
Because this module is central to many systems, a couple of additional steps may be required after installation:
- Airbag System Sync: If the airbag warning light is illuminated 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: On some models, a brake pedal position sensor recalibration might be necessary to ensure correct brake light operation and to satisfy the traction control system.
Disclaimer: Procedures can vary slightly by model. Consulting a factory service manual is always recommended.
Confirmed Compatibility for Your GM Truck or SUV
This module is a direct-fit replacement for the following vehicles and part numbers. It is compatible with service numbers: 15063577, 15081857, 19208544, 15095335, DKAJ, and DPNW.
- 2002 Cadillac Escalade (Body Control, under steering column, 4×4)
- 2002 Cadillac Escalade EXT (Body Control, under steering column)
- 2002 Chevrolet Avalanche 1500 (Body Control, under steering column, 4×4)
- 2002 Chevrolet Suburban 1500 (Body Control, under steering column, 4×4)
- 2002 Chevrolet Tahoe (Body Control, under steering column, 4×4)
- 2002 GMC Yukon (Body Control, under steering column, 4×4)
- 2002 GMC Yukon XL 1500 (Body Control, under steering column, 4×4)
Frequently Asked Questions
What does a Body Control Module (BCM) do?
The BCM is a computer that acts as the central hub for your vehicle’s body electronics. It controls functions like power windows, locks, lights, the security system, and instrument cluster data.
How do I provide my VIN for programming?
After you complete your purchase, simply send us a message with your 17-digit Vehicle Identification Number (VIN). We will program the BCM with the latest GM software for your specific vehicle before shipping it.
Is this a plug-and-play part?
For most functions, yes. Because we pre-program it to your VIN, you avoid a trip to the dealer. However, as noted, some vehicles may require an additional Airbag System Sync or Brake Pedal Position Relearn with a professional scan tool if certain warning lights appear.
Why is my airbag light on after installation?
The new BCM needs to be electronically ‘introduced’ to the vehicle’s airbag computer (SDM). This requires a ‘Setup SDM Primary Key in BCM’ procedure using a compatible high-end scan tool to sync the two modules and turn off the light.
Do I have to send my old BCM back?
No. This part has no core charge. You can keep your original module, saving you the time and hassle of a return shipment.