Is your 2002 GMC Sierra or other GM truck experiencing bizarre electrical problems? Issues like flickering lights, malfunctioning power windows and locks, or a security system that won’t cooperate are common signs of a failing Body Control Module (BCM). The BCM acts as the central hub for your vehicle’s body electronics, and when it fails, it can cause a wide range of frustrating and difficult-to-diagnose symptoms. This replacement BCM is the definitive solution to restore your truck’s functionality and peace of mind.
This module arrives at your door pre-programmed with the latest GM software updates, specifically flashed to your vehicle’s unique Vehicle Identification Number (VIN). This critical service means you can bypass the expensive programming fees and scheduling hassles at a dealership. Simply provide your VIN after purchase, and we handle the rest, ensuring a smoother installation process.
Common Symptoms of a Failing GM BCM
- ✔ Erratic or non-working power windows, door locks, or mirrors.
- ✔ Interior lights or dashboard lights staying on or not working at all.
- ✔ The security or anti-theft light is illuminated on the dash, possibly preventing the engine from starting.
- ✔ Horn honking unexpectedly or not working when pressed.
- ✔ Communication errors when a diagnostic scan tool is connected.
- ✔ Wipers behaving erratically or not parking in the correct position.
Solving Problems with a Programmed 2002 Sierra 3500 BCM
This Body Control Module is a direct replacement for a wide range of GM trucks and SUVs, including the Sierra, Silverado, Yukon, Tahoe, Suburban, and more. It is a reliable solution for part numbers 15063578, 15081796, 15095334, 19208537, DKAK, and DPNU. By ordering this part, you are getting a component that is ready for installation, saving you significant time and money.
Installation and Post-Install Notes
Installation is typically straightforward, as the BCM is located under the steering column or in the center dash area, depending on your model. While our VIN programming handles the majority of the setup, some vehicles may require additional steps after the new module is installed.
- Airbag System Sync: If the airbag warning light appears after installation, a ‘Setup SDM Primary Key in BCM’ procedure is necessary. This requires a professional-grade scan tool to sync the new BCM with the airbag system.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration may be needed to ensure correct brake light operation and traction control function.
Disclaimer: Specific procedures can vary by vehicle. Always consult a factory service manual or a qualified technician for guidance.
Frequently Asked Questions
What does a Body Control Module (BCM) do?
The BCM is a computer in your vehicle that controls and monitors various electronic accessories, such as power windows, locks, interior/exterior lighting, security systems, and wipers.
Is this part difficult to install?
For someone with moderate mechanical skill, the physical replacement is not difficult. It usually involves removing a few dash panels to access the module. The main benefit here is that our pre-programming eliminates the most complex part of the job.
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 your part until we receive this information, as it is essential for the programming process.
Will this fix my ‘Service 4WD’ light?
While the BCM communicates with many systems, a ‘Service 4WD’ light is more often related to the Transfer Case Control Module (TCCM) or a sensor/actuator in the 4WD system. It is important to get an accurate diagnosis before ordering parts.
Do I need to return my old BCM?
No, there is no core charge for this part. You can keep your original module.
What if the airbag light comes on after I install it?
This is not uncommon. It means the new BCM needs to be electronically introduced to the vehicle’s airbag system (SDM). This procedure, called ‘Setup SDM Primary Key in BCM’, must be done with a compatible high-level scan tool.