Restore Full Electrical Function to Your GM Truck or Van
Are you battling frustrating electrical gremlins in your 2002 GM vehicle? Issues like erratic power windows, flickering lights, a security system that acts up, or even a no-start condition can often be traced back to a single component: 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 cause a cascade of confusing and intermittent problems. This replacement BCM, part number 15081796, is the definitive solution to get your truck or van operating reliably again.
From the Diagnostic Bay
We had a 2002 Sierra 2500 in the shop that was driving the owner crazy. The power locks would work one minute and not the next, the dome light would stay on, and occasionally the truck wouldn’t start, showing only a security light on the dash. The owner had already replaced the driver’s door module and a few relays with no luck. After connecting our diagnostic tool, we saw multiple communication loss codes with the BCM. We installed one of our pre-programmed modules, and instantly, all the ghost-like electrical issues were gone. It’s a classic case where chasing individual symptoms can be costly, while addressing the root cause—the BCM—is the real fix.
Common Symptoms of a Failing BCM
- ✔ Erratic or non-functional power windows, door locks, and mirrors.
- ✔ Interior or exterior lights that won’t turn on or off correctly.
- ✔ The security or anti-theft light stays on, preventing the engine from starting.
- ✔ Horn honking unexpectedly or not working at all.
- ✔ Instrument cluster warning lights appearing without cause.
- ✔ Problems with the radio or climate control systems.
- ✔ Diagnostic trouble codes (DTCs) indicating a loss of communication with the BCM.
The Simple Solution: A Programmed 2002 Silverado BCM
Skip the expensive trip to the dealership and the hassle of finding a shop to program a new module. We take the complexity out of the repair. When you purchase this BCM, we use the Vehicle Identification Number (VIN) you provide to flash the unit with the latest, most stable software direct from GM. This ensures that the module is a perfect match for your vehicle’s specific options and configuration. The result is a BCM that is ready for installation right out of the box, saving you time, money, and diagnostic headaches. There is no core charge, so you can keep your original module.
Important Post-Installation Information
While this module is programmed for a straightforward installation, some GM vehicles of this era may require one or two final calibration steps with a professional scan tool after the BCM is installed:
- Airbag System Sync: If your airbag warning light is illuminated after installation, a procedure called “Setup SDM Primary Key in BCM” is needed to sync the new BCM with the airbag system.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration may be necessary to ensure correct brake light operation and traction control functionality.
Always consult a factory service manual or a qualified technician if you are unsure about these procedures.
This BCM is a direct replacement for the following part numbers:
15063578, 15081796, 15095334, 19208537, DKAK, DPNU
YUKON 02 Body Control (BCM); (under steering column), 4×2
BLAZER S10/JIMMY S15 02 Body Control (BCM); (center dash), ID 15063578
BLAZER S10/JIMMY S15 03-05 Body Control (BCM); (center dash)
SILVERADO 3500 PICKUP 02 Body Control (BCM); (under steering column)
SIERRA 3500 PICKUP 02 Body Control (BCM); (under steering column)
SIERRA 2500 PICKUP 02 Body Control (BCM); (under steering column)
S10/S15/SONOMA 03-04 Body Control (BCM)
SAFARI (GMC) 02-03 Body Control (BCM); (center dash), ID 15095334
SAFARI (GMC) 04-05 Body Control (BCM); (center dash)
ESCALADE 02 Body Control (BCM); (under steering column), 4×2
SUBURBAN 2500 02 Body Control (BCM); (under steering column)
ASTRO 02-03 Body Control (BCM); (center dash), ID 15063578
SILVERADO 2500 PICKUP 02 Body Control (BCM); (under steering column)
SIERRA 1500 PICKUP 02 Body Control (BCM); (under steering column)
YUKON XL 1500 02 Body Control (BCM); (under steering column), 4×2
AVALANCHE 1500 02 Body Control (BCM); (under steering column), 4×2
BLAZER S10/JIMMY S15 02 Body Control (BCM); (center dash), ID 15085334
SUBURBAN 1500 02 Body Control (BCM); (under steering column), 4×2
YUKON XL 2500 02 Body Control (BCM); (under steering column)
ASTRO 04-05 Body Control (BCM); (center dash)
SAFARI (GMC) 02-03 Body Control (BCM); (center dash), ID 15081796
S10/S15/SONOMA 02 Body Control (BCM); (center dash), ID 15063578
BLAZER S10/JIMMY S15 02 Body Control (BCM); (center dash), ID 15081796
S10/S15/SONOMA 02 Body Control (BCM); (center dash), ID 15095334
S10/S15/SONOMA 02 Body Control (BCM); (center dash), ID 15081796
SAFARI (GMC) 02-03 Body Control (BCM); (center dash), ID 15063578
SIERRA DENALI 02 Body Control (BCM); (under steering column)
SILVERADO 1500 PICKUP 02 Body Control (BCM); (under steering column)
TAHOE 02 Body Control (BCM); (under steering column), 4×2
ASTRO 02-03 Body Control (BCM); (center dash), ID 15095334
Frequently Asked Questions
Do I need to have this BCM programmed by a dealer?
No. We handle the programming for you before we ship the part. Simply provide your vehicle’s VIN during or after checkout, and it will arrive ready for installation.
What does the BCM actually do on my truck?
The Body Control Module acts as the brain for your vehicle’s electronic accessories. It controls functions like power windows, power locks, interior and exterior lighting, the security system, and the horn.
How do I know if my BCM is the problem?
Common signs include multiple, unrelated electrical issues happening at once, such as non-working power locks and windows, a security light that prevents starting, or lights that behave erratically. A diagnostic scan showing communication loss codes with the BCM is a strong indicator.
Is this part truly plug-and-play?
For most vehicles, yes. Because it’s programmed to your VIN, it should work upon installation. However, as noted above, some vehicles may require a simple relearn procedure for the airbag system or brake pedal position sensor, which requires a professional scan tool.
Where do I find my vehicle’s VIN?
Your 17-digit VIN can be found on the driver’s side of the dashboard (visible through the windshield), on the driver’s side door jamb sticker, or on your vehicle’s registration and insurance documents.
My original part has a different number. Will this still work?
Yes, this BCM is a direct replacement for several part numbers, including 15063578, 15095334, and 19208537. As long as your original part number is on our list, this module is the correct fit.