Restore Your GM’s Brain and End Electrical Chaos
Are you chasing electrical gremlins in your 2002-2005 GM truck or van? Flickering lights, a security system that acts up, power windows with a mind of their own, or a frustrating no-start condition can often be traced back to one single component: a failing Body Control Module (BCM). As the central hub for your vehicle’s body electronics, when the BCM starts to go, it can create a cascade of bizarre, seemingly unrelated problems. This isn’t just an annoyance; it can affect vehicle security and safety systems.
This isn’t just a replacement part; it’s a complete, hassle-free solution. We take the guesswork and the expensive dealership trip out of the equation. Simply provide us with your vehicle’s VIN after purchase, and our technicians will program this module with the latest GM software specific to your truck or van. It arrives at your door ready for installation, saving you time, money, and the headache of programming tools. This is the definitive fix for a faulty GM Body Control Module 15081796.
Case Study: A Tricky Diagnosis
I once had a 2002 Silverado 2500 in the bay that was driving its owner crazy. The radio would turn on and off, the dome light would flicker while driving, and occasionally, the truck would refuse to crank, showing only a ‘Security’ light on the dash. The owner had already replaced the battery and alternator. After checking the main power and ground connections, my scan tool showed multiple communication loss codes (U-codes) with various modules. This pointed directly to the BCM. These modules often fail from internal solder joint fractures due to heat cycles and vibration. We installed a VIN-programmed BCM, and all the ghost-like issues vanished instantly. It turned a multi-day diagnostic nightmare into a one-hour fix.
Common Symptoms of a Failing GM BCM
If your vehicle is experiencing several of the issues below, a faulty BCM is the most likely culprit. In my shop, I’ve seen these modules cause some of the most confusing diagnostic challenges. Replacing the GM Body Control Module 15081796 is often the final, correct repair.
- ✔ Erratic or non-functional power windows, door locks, or mirrors
- ✔ Interior or exterior lights flickering, staying on, or not working at all
- ✔ The security system light flashing, preventing the engine from starting
- ✔ Horn honking randomly or not working when pressed
- ✔ Intermittent issues with the radio or climate control displays
- ✔ Diagnostic trouble codes (DTCs) related to communication loss (U-codes) or body functions (B-codes)
Your Straightforward BCM Installation Guide
Installing your new BCM is a manageable job for a DIY enthusiast. The location varies slightly by model, but the process is similar. Always disconnect the battery before starting any electrical work.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and wait a few minutes for the system to discharge.
- Locate the BCM: On most trucks (Silverado, Sierra, Tahoe, etc.), it’s located under the driver’s side of the dashboard, near the steering column. On vans (Astro, Safari) and S-series trucks (Blazer, S10), it’s often behind the center dash/glove box area.
- Remove Trim Panels: Carefully remove any plastic trim or kick panels necessary to access the module.
- Disconnect and Remove: The BCM is held in by a few bolts or clips. Unplug the electrical connectors—they have locking tabs you’ll need to press—and remove the old module.
- Install the New Module: Seat the new, pre-programmed BCM in the mounting bracket, reconnect all electrical connectors securely, and fasten it in place.
- Reconnect and Test: Reinstall any trim panels you removed. Reconnect the battery terminal. Start the vehicle and test all functions: lights, locks, windows, radio, etc.
Important Post-Installation Notes
Because this GM Body Control Module 15081796 is pre-programmed, most vehicles will be ready to go. However, in some cases, additional steps may be required:
- Airbag System Sync: If the 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 BCM with the airbag system.
- Brake Pedal Position Relearn: On certain models, a brake pedal position sensor relearn may be necessary to ensure correct brake light and traction control operation.
Disclaimer: Vehicle systems vary. We always recommend consulting a factory service manual or a qualified technician if you are unsure about any step.
Verified Fitment for Your GM Truck or Van
This module is a direct replacement for part numbers 15081796, 15063578, 15095334, 19208537, DKAK, and DPNU. Please verify your original part number or consult the list below to ensure compatibility.
AVALANCHE 1500 (2002, 4×2)
BLAZER S10 (2002-2005)
SILVERADO 1500, 2500, 3500 PICKUP (2002)
S10 PICKUP (2002-2004)
SUBURBAN 1500, 2500 (2002, 4×2)
TAHOE (2002, 4×2)
ASTRO VAN (2002-2005)
GMC:
JIMMY S15 (2002-2005)
SIERRA 1500, 2500, 3500 PICKUP (2002)
SIERRA DENALI (2002)
SONOMA S15 (2002-2004)
YUKON (2002, 4×2)
YUKON XL 1500, 2500 (2002, 4×2)
SAFARI VAN (2002-2005)
Cadillac:
ESCALADE (2002, 4×2)
Frequently Asked Questions
Do I need to send my old BCM back?
No. This part comes with no core charge. You can keep your original module, which can be helpful if you ever need to reference its part number.
Is this module truly plug-and-play?
Yes, for the vast majority of vehicles. We program it using your VIN so it communicates correctly with your vehicle’s existing components. In rare cases, as noted above, a simple relearn procedure for the airbag or brake sensor may be needed, which requires a high-end 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 the module until we have this information to ensure it is programmed correctly for you.
What if my original part number is not 15081796?
This module is a direct replacement for several part numbers, including 15063578, 15095334, and 19208537. As long as your original part number is on our cross-reference list, this module will fit and function correctly.
Will this fix my ‘Security’ light no-start problem?
A failing BCM is one of the most common causes of an active security system that prevents the engine from cranking. While other issues can cause this (like a faulty ignition switch), if you’re also experiencing other electrical problems, the BCM is the prime suspect.