Restore Control and Eliminate Electrical Gremlins
If you’re dealing with bizarre electrical issues in your 2002 GM truck or SUV—like flickering lights, malfunctioning power windows and locks, or a persistent security light that prevents it from starting—you’re not alone. These are classic symptoms of a failing Body Control Module (BCM). As the central hub for your vehicle’s body electronics, a faulty BCM can cause a cascade of frustrating problems. This replacement Body Control Module, part number 15081857, is the definitive solution to restore your vehicle’s proper function and peace of mind.
What sets our service apart is that we handle the most critical step for you. Before this module ships, we will program it with the latest GM software updates specifically matched to your vehicle’s VIN. This means no expensive trips to the dealership for programming. You get a component that is ready for installation right out of the box, saving you significant time and money. Simply provide us with your VIN after your purchase, and we’ll take care of the rest.
A Technician’s Notebook
I remember a 2002 Tahoe that came into the shop with a laundry list of complaints. The owner was at his wit’s end. The radio would turn on and off, the dome lights wouldn’t work, and the “Service 4WD” message was constantly illuminated, even though the transfer case was fine. A scan tool showed a dozen communication codes, primarily U-codes pointing to a network failure. Instead of chasing each individual symptom, we went straight to the network’s command center: the BCM. A quick voltage check at the module’s data lines confirmed erratic signals. Swapping in a pre-programmed BCM like this one solved every single issue in under an hour. It’s a reminder that sometimes the most complex-seeming problems have a single, central solution.
Common Signs of a Failing BCM
- ✔ Erratic or non-functional power windows, door locks, and interior lights.
- ✔ The security or anti-theft system light stays on, causing a no-start condition.
- ✔ Intermittent operation of the radio, climate controls, or instrument cluster gauges.
- ✔ False warning messages on the driver information center (e.g., “Service 4WD”).
- ✔ Communication-related Diagnostic Trouble Codes (DTCs), such as U1000, stored in other modules.
- ✔ Inconsistent or non-working remote keyless entry (fob).
A Straightforward Guide to Your 2002 Yukon BCM Installation
- ✔ Safety First: Disconnect the negative terminal from your vehicle’s battery and wait at least 10 minutes to allow all systems to power down completely.
- ✔ Locate the BCM: On these GM models, the Body Control Module is typically located under the driver’s side of the dashboard, near the steering column. You may need to remove a lower dash panel for access.
- ✔ Disconnect and Remove: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the module from its mounting bracket.
- ✔ Install the New Module: Mount your new, pre-programmed BCM in the exact location of the old one. Securely plug in all the electrical connectors, ensuring they click into place.
- ✔ Reconnect Power: Re-attach the negative battery terminal.
- ✔ Perform Final Checks: Turn the key to the ‘On’ position and verify that your power accessories, lights, and gauges are functioning correctly. Please review the post-installation procedures below, as additional steps may be required.
Important Post-Installation Procedures
After installing your new BCM, your vehicle may require one or more relearn procedures to ensure all systems communicate correctly. This is a normal part of the process.
- Airbag System Sync: If the airbag warning light is illuminated after installation, it means the new BCM needs to be synced with the airbag’s Sensing and Diagnostic Module (SDM). A professional scan tool is required to perform the “Setup SDM Primary Key in BCM” procedure. This is only necessary if the light is on.
- Brake Pedal Position Relearn: In some cases, a brake pedal position sensor recalibration may be needed to ensure your brake lights and traction control system operate as intended. This also typically requires a capable scan tool.
Disclaimer: Vehicle systems can vary. We always recommend consulting a factory service manual or a certified technician if you are unsure about any step of the process.
Verified Vehicle Compatibility
This module is a direct-fit replacement for the following vehicles, matching part numbers 15063577, 15081857, 19208544, 15095335, DKAJ, and DPNW. It is located under the steering column.
- ✔ 2002 Cadillac Escalade (4×4)
- ✔ 2002 Cadillac Escalade EXT
- ✔ 2002 Chevrolet Avalanche 1500 (4×4)
- ✔ 2002 Chevrolet Suburban 1500 (4×4)
- ✔ 2002 Chevrolet Tahoe (4×4)
- ✔ 2002 GMC Yukon (4×4)
- ✔ 2002 GMC Yukon XL 1500 (4×4)
Frequently Asked Questions
What exactly is VIN programming?
VIN programming involves loading your vehicle’s unique 17-digit Vehicle Identification Number and its specific factory options into the BCM. This ensures all electronic systems, from the engine to the power locks, work together seamlessly as the manufacturer intended. We do this for you before shipping.
Do I need to send my old BCM back?
No. There is absolutely no core charge or need to return your original module. You can keep it or dispose of it responsibly.
Can I install this myself if I’m a DIYer?
Yes, the physical installation is straightforward for someone with basic mechanical skills. It involves removing a dash panel and swapping the module. However, be aware that post-installation relearn procedures (like for the airbag or brake sensor) may require a professional-grade scan tool.
Will this fix my “Service 4WD” light?
In many cases, yes. A failing BCM is a very common cause of false “Service 4WD” messages on these 2002 GM trucks and SUVs because it disrupts communication with the transfer case control module. If the BCM is the root cause, this part will resolve the issue.
What happens after I place my order?
After you complete your purchase, you will need to send us your vehicle’s VIN. Once we receive it, our technicians will program the BCM with the latest GM software for your specific vehicle and then ship it out to you, typically within one business day.