Restore Your GM Truck’s Brain and End Electrical Chaos
Are you chasing electrical gremlins in your 2002 GMC Sierra or another compatible GM vehicle? Flickering dash lights, power windows with a mind of their own, or a security light that leaves you stranded are classic signs of a failing Body Control Module (BCM). The BCM is the central command for your truck’s body electronics, and when it goes bad, it can cause a host of frustrating and unpredictable problems. This isn’t just an annoyance; it’s a breakdown in your vehicle’s core systems. We offer a reliable, straightforward solution: a replacement BCM, programmed specifically for your vehicle using your VIN.
Case Study: The 2002 Silverado No-Start Mystery
I had a 2002 Silverado 1500 towed into my bay that had stumped two other shops. The owner said it would randomly refuse to start, with the “Security” light flashing on the dash. He’d already replaced the battery and ignition switch to no avail. Diagnostics showed intermittent communication loss with the BCM (a classic U-code). The Passlock security data was getting scrambled. Instead of a costly diagnostic rabbit hole, we confirmed the BCM was the culprit. We installed one of our VIN-programmed modules, and the truck fired up on the first try. The key is that the new BCM already had the correct security handshake data for his specific truck, saving hours of programming and troubleshooting. It’s a fix that restores both function and the owner’s confidence.
Is Your GM Vehicle Showing These BCM Failure Symptoms?
A failing BCM can manifest in numerous ways. If you’re experiencing any of the following, this module is likely the solution you need. Check your vehicle for:
- âś” Erratic or non-functional power windows, door locks, or mirrors.
- âś” Interior dome lights or dashboard lights staying on or not working at all.
- âś” The “Security” or anti-theft light is illuminated, often causing a no-start condition.
- âś” Horn honking unexpectedly or not working when pressed.
- âś” Diagnostic trouble codes (DTCs) related to communication loss (like U1000) or specific body functions (B-series codes).
- âś” Wipers operating intermittently or not parking in the correct position.
Your Straightforward BCM Installation Guide
Replacing the BCM is a manageable job for a DIYer with basic tools. Our pre-programmed module eliminates the most difficult step—the software configuration. Here’s a general guide:
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on any electronic components.
- Locate the BCM: On most GM trucks (Silverado, Sierra, Tahoe, etc.), the BCM is located under the driver’s side of the dashboard, near the steering column. On vans (Astro, Safari), it’s often behind the center dash panel.
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the old BCM from its mounting bracket.
- Install the New Module: Mount your new, pre-programmed BCM in the same location. Securely plug in all the electrical connectors, ensuring they click into place.
- Reconnect and Test: Reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all body functions—windows, locks, lights, etc.—to confirm proper operation.
Important Post-Installation Notes
While our BCM is programmed for your vehicle, some systems may require a ‘handshake’ with the new module. Please be aware of the following potential procedures:
- Airbag System Sync: If your airbag warning light is on after installation, a professional scan tool is needed to perform the “Setup SDM Primary Key in BCM” procedure. This syncs the airbag system with the new BCM.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor relearn may be required to ensure your brake lights and traction control system function correctly.
Disclaimer: Vehicle systems vary. Always refer to a factory service manual for procedures specific to your make and model.
Verified Fitment for These GM Models
This BCM is a direct replacement for part number 15095334 and is also a compatible replacement for part numbers 15063578, 15081796, 19208537, DKAK, and DPNU. It is guaranteed to fit a wide range of GM trucks, vans, and SUVs from 2002 to 2005. Please check the list below to confirm your vehicle is included. This part fits models such as the 2002 GMC Sierra 1500, 2500, & 3500, Chevrolet Silverado, Tahoe, Suburban, Avalanche, Cadillac Escalade, GMC Yukon, as well as the Chevrolet Astro, GMC Safari, S10/Sonoma, and Blazer/Jimmy models within that year range. Please verify the part number on your original module to ensure a perfect match.
Frequently Asked Questions
Do I need to take this BCM to a dealer for programming?
No. The main benefit of our service is that we program the module to your vehicle’s specific VIN before we ship it. This saves you the time, hassle, and expense of a dealership visit.
Where is the BCM located on my vehicle?
It varies by model. On most full-size trucks and SUVs like the Sierra and Silverado, it’s under the driver’s side dashboard. On vans like the Astro and Safari, it’s typically located in the center dash area.
What if my airbag light turns on after I install it?
This is not uncommon. The new BCM needs to be electronically introduced to the airbag module (SDM). This requires a ‘Setup SDM Primary Key in BCM’ procedure, which can be done with a bi-directional professional scan tool.
Is there a core charge for my old BCM?
No, there is no core charge. You can keep your old module.
How do I give you my VIN for programming?
After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). We will then program the module before shipping it to you.
Will this fix the flashing “Security” light on my dash?
In the vast majority of cases, yes. The BCM controls the vehicle’s Passlock anti-theft system. A faulty BCM is the most common cause of security-related no-start issues on these GM vehicles.