Are you battling frustrating electrical issues in your GM truck or SUV? Flickering lights, malfunctioning power windows, a security system with a mind of its own, or a mysterious battery drain are all classic signs of a failing Body Control Module (BCM). The BCM is the central command center for your vehicle’s body electronics, and when it fails, it can cause a cascade of confusing problems. This replacement Body Control Module, compatible with part number 15095334 and others, is the definitive solution to restore your vehicle’s functionality and peace of mind.
From the Diagnostic Bay
We had a 2002 Silverado come in with a complaint of a dead battery every morning. The owner had already replaced the battery and alternator, but the problem persisted. A parasitic draw test showed a significant power drain even when the truck was off. After isolating circuits, we traced the draw to the BCM. The internal circuits were failing, keeping certain systems partially active overnight. Installing a VIN-programmed BCM like this one not only solved the battery drain but also fixed a quirky power lock issue the owner had learned to live with. It’s often the central culprit for the most puzzling electrical gremlins.
Common Symptoms of a Failing BCM
- ✔ Erratic or non-functional power windows, door locks, and mirrors.
- ✔ Interior dome lights or exterior lights staying on or not turning on at all.
- ✔ The security system engaging randomly, causing the horn to honk or preventing the engine from starting.
- ✔ Unexplained parasitic battery drain that kills your battery overnight.
- ✔ Gauges on the instrument cluster behaving erratically or not working.
- ✔ HVAC (heater and A/C) controls or blower motor not functioning correctly.
- ✔ ‘Service 4WD’ or other warning messages appearing on the dash.
Your Plug-and-Play 2002 Sierra BCM Solution
Getting your truck fixed shouldn’t be complicated. That’s why we offer this BCM fully programmed to your vehicle’s specific Vehicle Identification Number (VIN). Simply provide us with your VIN after purchase, and our technicians will flash the module with the latest, most stable software from General Motors. This critical step ensures the BCM communicates perfectly with your truck’s other modules right out of the box, saving you from a costly trip to the dealership for programming. This is the most efficient way to get a reliable, correctly configured 2002 Sierra BCM or compatible module for your vehicle.
Important Post-Installation Information
While this module is designed for a straightforward installation, some vehicles may require additional steps to ensure all systems are synchronized. Please be aware of the following potential procedures:
- Airbag System Sync: If your airbag warning light is illuminated 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 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 any part of the installation or post-installation process.
Frequently Asked Questions
What does a Body Control Module (BCM) do?
The BCM is a computer that controls many of your vehicle’s non-engine related functions, such as power windows, locks, lights, security system, wipers, and HVAC controls. It acts as a central hub for these electronic features.
Is this part difficult to install?
The physical installation is typically straightforward, involving the removal of a few dash panels and unplugging the old module to plug in the new one. The location is usually under the steering column or in the center dash area. However, post-installation procedures like an airbag sync may require a professional scan tool.
How do I provide my VIN for programming?
After you complete your purchase, you will receive instructions on how to send us your vehicle’s 17-digit VIN. We cannot ship your order until we receive this information, as the programming is essential for the part to work.
Do I need to return my old BCM?
No, there is no core charge for this part. You can keep your original module.
Will this BCM fit my vehicle?
This module is a direct replacement for part numbers 15095334, 15063578, 15081796, 19208537, DKAK, and DPNU. It fits a wide range of 2002-2005 GM trucks and SUVs like the Sierra, Silverado, Tahoe, Suburban, Astro, and Blazer. Please verify your part number before ordering.