Is Your GM Truck or SUV Experiencing Bizarre Electrical Problems?
If your 2002 GMC Sierra, Silverado, or other compatible GM vehicle is suffering from strange electrical gremlins, a failing Body Control Module (BCM) is the most likely culprit. The BCM is the central command center for your vehicle’s body electronics, managing everything from your power windows and door locks to the interior lights and security system. When it fails, it can cause a cascade of frustrating and unpredictable issues, making your vehicle unreliable.
From the Diagnostic Bay
We had a 2002 Silverado 2500 in the shop that was driving the owner crazy. The dome lights would randomly turn on while driving, the radio would shut off, and sometimes the power door locks wouldn’t respond. He’d already replaced the battery twice, thinking it was a power drain issue. After running diagnostics, we found communication errors pointing directly to the BCM. It was intermittently failing and sending faulty signals across the network. Installing a VIN-programmed BCM like this one resolved all the issues in a single afternoon. It’s a common failure point on these otherwise rock-solid trucks.
Common Symptoms of a Failing GM BCM
- ✔ Erratic or non-functional power windows, mirrors, or door locks.
- ✔ Interior or exterior lights staying on or not turning on at all.
- ✔ The security system acting up, causing no-start conditions or false alarms.
- ✔ Radio or climate control systems turning on and off by themselves.
- ✔ Warning lights on the dashboard, including the airbag light.
- ✔ Communication loss with other vehicle modules, leading to diagnostic trouble codes (DTCs).
The Direct Solution: A VIN-Programmed 2002 Sierra BCM
Don’t let a faulty module sideline your vehicle. This Body Control Module is a direct, reliable replacement for your original unit. We take the hassle out of the repair by pre-programming it specifically for your vehicle using your VIN. This means it arrives at your door with the latest GM software updates already installed, ready for a straightforward installation. You get a part that communicates perfectly with your truck’s existing systems, restoring full functionality without a costly trip to the dealership.
This module is a guaranteed fit for part numbers 15095334, 15063578, 15081796, 19208537, DKAK, and DPNU, covering a wide range of GM trucks and SUVs from the era.
Post-Installation Information
While this BCM is programmed for a simple installation, some vehicles may require minor post-installation procedures to sync all systems perfectly. This is normal and ensures all safety and convenience features operate as designed.
- Airbag System Sync: If your airbag warning light is on after installation, a technician will need to perform the “Setup SDM Primary Key in BCM” procedure with a professional scan tool. This syncs the new BCM with the airbag system.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor relearn may be needed to ensure correct brake light operation and traction control function.
There is no core charge for this part. You can keep your old module.
Frequently Asked Questions
How does the VIN programming work?
After you place your order, you will need to provide us with your vehicle’s 17-digit VIN. We use this to load the exact software and vehicle-specific options from GM’s database onto the BCM before we ship it to you.
Is this part truly plug-and-play?
For most vehicles and functions, yes. Because it’s pre-programmed, it will immediately restore control over most body electronics. However, as noted, some safety systems like the airbag or brake position sensor may require a simple relearn procedure with a scan tool.
Where is the BCM located on a 2002 GMC Sierra?
On the 2002 Sierra, Silverado, Tahoe, and Yukon, the BCM is typically located under the driver’s side of the dashboard, near the steering column. On vans like the Astro and Safari, it’s often behind the center dash panel.
Will this fix my “Service Security System” message?
A faulty BCM is a very common cause of security system issues and no-start conditions in these GM vehicles. Replacing it with a correctly programmed module will often resolve these problems.
What if my original part number is slightly different?
This module replaces several part numbers, including 15063578, 15081796, and 19208537. Please check the fitment list or contact us with your VIN and original part number to confirm compatibility.