Are you battling bizarre electrical issues in your 2002 GM truck or SUV? Flickering lights, unresponsive power windows, a security system that acts on its own, or a no-start condition can all point to a single culprit: a failing Body Control Module (BCM). The BCM is the central command center for your vehicle’s body electronics, and when it malfunctions, it can create a host of frustrating and difficult-to-diagnose problems. This replacement BCM is the definitive solution to restore your vehicle’s electronic systems to perfect working order.
This unit arrives at your door pre-programmed with the latest GM software updates, specifically flashed to your vehicle’s unique Vehicle Identification Number (VIN). This means you can skip the expensive trip to the dealership for programming. Simply provide us with your VIN upon purchase, and we’ll handle the complex software configuration before shipping. This ensures a straightforward installation process and immediate functionality.
Common Failure Symptoms
- ✔ Erratic or non-functional interior and exterior lights
- ✔ Power windows, door locks, or mirrors not working
- ✔ Vehicle security system randomly activating or preventing the engine from starting
- ✔ Horn honking unexpectedly or not working at all
- ✔ Intermittent ‘Service 4WD’ or other warning messages on the dash
- ✔ Battery drain when the vehicle is turned off
From the Diagnostic Bay
We had a 2002 Silverado in the shop that was driving the owner crazy. The radio would turn on and off, the dome light would flicker, and sometimes the truck just wouldn’t start. He had already replaced the battery and alternator. We traced the wiring and found no shorts. After connecting our scan tool, we saw multiple communication loss codes with various modules. All signs pointed to the central hub – the BCM. After installing a VIN-programmed BCM like this one, every single electrical gremlin vanished. It’s a perfect example of how one failing module can mimic a dozen different problems.
Your Plug-and-Play 2002 Sierra Denali Body Control Module
Don’t let a faulty BCM keep your truck off the road. Our service provides a reliable, cost-effective alternative to the dealership. We ensure that the module you receive is ready for installation, taking the guesswork out of the repair. This BCM is a direct replacement for multiple part numbers, including 15063578, 15081796, 15095334, 19208537, DKAK, and DPNU, guaranteeing wide compatibility across a range of GM models.
Important Post-Installation Information
While this module is programmed for your VIN, certain vehicle systems may require a ‘handshake’ with the new BCM after installation. This is a normal part of the process. Specifically:
- Airbag System Sync: If your airbag warning light is illuminated after installation, a simple ‘Setup SDM Primary Key in BCM’ procedure must be performed with a compatible professional scan tool. This syncs the airbag system with the new BCM.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor relearn may be needed to ensure correct brake light operation and to satisfy the traction control system.
Always consult a factory service manual or a qualified technician if you are unsure about these procedures.
Frequently Asked Questions
Is this BCM ready to install out of the box?
Yes, this Body Control Module comes pre-programmed to the VIN you provide. This makes the installation process much simpler, though some vehicles may require the additional relearn procedures mentioned above.
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 program and ship your module until we receive this information.
What happens if the airbag light comes on?
This is not a defect. It simply means the airbag module (SDM) needs to be electronically introduced to the new BCM. A qualified shop with a high-level scan tool can perform the ‘Setup SDM Primary Key in BCM’ procedure in a few minutes.
Do I need to send my old BCM back?
No, there is no core charge for this part. You can keep your original module.
Will this fit models other than the 2002 Sierra Denali?
Absolutely. This BCM fits a wide range of 2002-2005 GM trucks, vans, and SUVs, including the Silverado, Tahoe, Suburban, Astro, Safari, and more. Please check the detailed fitment list on this page to confirm compatibility.