Restore Your Truck’s Electrical System with a Reliable, Pre-Programmed BCM
If you’re dealing with bizarre electrical issues in your 2002 GMC Sierra or a similar GM truck, you know the frustration. Lights flickering, power windows and locks with a mind of their own, or a security light that prevents your truck from starting—these are classic signs of a failing Body Control Module (BCM). The BCM is the central command for your vehicle’s body electronics, and when it goes bad, it can feel like your truck is haunted. This isn’t just an annoyance; it’s a reliability and safety issue. Don’t let a faulty module leave you stranded or dealing with unpredictable behavior.
We offer a straightforward, dependable solution. This BCM is meticulously tested and programmed with the latest GM software updates specifically for your vehicle’s VIN. This means you’re not just getting a replacement part; you’re getting a component that corrects potential factory flaws and ensures seamless communication between all your vehicle’s systems. By providing your VIN at checkout, you eliminate the need for an expensive trip to the dealership for programming. This is a direct-fit solution designed to get you back on the road with confidence and without the hassle.
A Technician’s Notebook: The Case of the Haunted Sierra
I remember a 2002 Sierra 2500 that rolled into my bay with a list of complaints that seemed unrelated. The owner said the dome light would stay on, the radio presets would randomly reset, and sometimes the power door locks wouldn’t respond. The final straw was when the truck refused to start, with the security light flashing on the dash. A quick scan showed a slew of U-codes (communication errors) pointing to the BCM. After confirming power and ground to the module were good, it was clear the BCM itself was the culprit. Swapping in a VIN-programmed BCM like this one solved every single issue instantly. It’s a common failure point I’ve seen dozens of times on these GMT800 platform trucks.
Is Your GM Truck or Van Showing These Signs?
- ✔ Power windows, mirrors, or door locks operating intermittently or not at all.
- ✔ Interior or exterior lights flickering, staying on, or not turning on.
- ✔ The security or anti-theft light is illuminated, causing a no-start condition.
- ✔ The instrument cluster displays erratic behavior or incorrect information.
- ✔ Diagnostic trouble codes (DTCs) related to communication loss with other modules (e.g., U0140, U0155).
- ✔ Horn honking unexpectedly or not working when pressed.
- ✔ Wipers activating on their own or not functioning properly.
Your Straightforward BCM Installation Guide
For most DIYers with basic tools, this is a manageable job. The goal is to swap the modules without needing a professional scan tool for the initial setup. On most compatible trucks like the Sierra and Silverado, the BCM is located under the driver’s side of the dashboard, near the steering column.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait at least 15 minutes to allow all systems to power down completely.
- Locate the BCM: On most trucks and SUVs listed, you’ll find it under the driver-side dash. It’s a black plastic box with several large multi-pin electrical connectors. On vans like the Astro and Safari, it’s typically behind the center dash area.
- Disconnect and Remove: Carefully unplug all electrical connectors. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the old BCM from its mounting bracket and remove it.
- Install the New Module: Mount your new, pre-programmed BCM in the same location. Securely plug in all the electrical connectors, making sure each one clicks firmly into place.
- Reconnect and Test: Reconnect the negative battery terminal. Turn the key to the ‘On’ position (without starting the engine) and test all body functions: lights, locks, windows, radio, etc.
- Post-Installation Checks: Start the vehicle. If an airbag light appears, a professional scan tool is needed for the ‘Setup SDM Primary Key’ procedure. Similarly, a brake pedal position relearn may be required for optimal brake light and traction control function.
Verified Fitment For These GM Models
This BCM is a direct replacement for part numbers 15063578, 15081796, 15095334, 19208537, DKAK, and DPNU. Please verify your part number or contact us with your VIN to ensure compatibility. This module fits the following vehicles:
AVALANCHE 1500 02 Body Control (BCM); (under steering column), 4×2
BLAZER S10/JIMMY S15 02-05 Body Control (BCM); (center dash)
ESCALADE 02 Body Control (BCM); (under steering column), 4×2
SAFARI (GMC) 02-05 Body Control (BCM); (center dash)
S10/S15/SONOMA 02-04 Body Control (BCM); (center dash)
SIERRA 1500 PICKUP 02 Body Control (BCM); (under steering column)
SIERRA 2500 PICKUP 02 Body Control (BCM); (under steering column)
SIERRA 3500 PICKUP 02 Body Control (BCM); (under steering column)
SIERRA DENALI 02 Body Control (BCM); (under steering column)
SILVERADO 1500 PICKUP 02 Body Control (BCM); (under steering column)
SILVERADO 2500 PICKUP 02 Body Control (BCM); (under steering column)
SILVERADO 3500 PICKUP 02 Body Control (BCM); (under steering column)
SUBURBAN 1500 02 Body Control (BCM); (under steering column), 4×2
SUBURBAN 2500 02 Body Control (BCM); (under steering column)
TAHOE 02 Body Control (BCM); (under steering column), 4×2
YUKON 02 Body Control (BCM); (under steering column), 4×2
YUKON XL 1500 02 Body Control (BCM); (under steering column), 4×2
YUKON XL 2500 02 Body Control (BCM); (under steering column)
Frequently Asked Questions
Do I need to program this BCM?
No. We handle the programming for you before shipment. Simply provide your vehicle’s 17-digit VIN during or after checkout, and it will arrive ready to install.
Where is the BCM located on my 2002 Sierra?
On the 2002 GMC Sierra and its sister trucks (Silverado, Tahoe, Yukon), the Body Control Module is located under the driver’s side of the dashboard, typically attached to a bracket near the steering column.
Is there a core charge for this part?
No, there is no core charge. You can keep your old, original BCM without needing to send it back to us.
What if my airbag light comes on after installation?
In some cases, the new BCM needs to be synced with the airbag system’s Sensing and Diagnostic Module (SDM). This requires a ‘Setup SDM Primary Key in BCM’ procedure with a professional-grade scan tool to clear the light.
Will this fix my flashing security light and no-start problem?
Yes, a faulty BCM is one of the most common causes of a flashing security light and a crank-no-start condition on these GM vehicles. This programmed BCM is the correct solution for that specific failure.
What happens if I don’t provide my VIN?
We cannot ship the module without a VIN. The programming is essential for the part to function correctly in your specific vehicle, as it configures the BCM for your truck’s exact options and security system.