Restore Full Functionality to Your GM Truck or Van
Are you battling frustrating electrical gremlins in your 2002 GMC Sierra or another compatible GM vehicle? Intermittent power windows, door locks with a mind of their own, a security light that won’t turn off, or even a no-start condition can often be traced back to a single, failing component: the Body Control Module (BCM). As the central nervous system for your vehicle’s body electronics, a faulty BCM can cause a cascade of confusing and unpredictable problems. This isn’t just an inconvenience; it can affect your vehicle’s security and daily usability.
This replacement Body Control Module is the definitive, reliable solution. We take the biggest headache out of the repair process by programming the module specifically for your vehicle using your VIN. This means it arrives at your door with the latest GM software updates already installed, ready for a straightforward installation. You get to skip the expensive trip to the dealership for programming, saving you both time and money. This is the same high-quality fix I’ve recommended and installed for hundreds of customers over my 20+ years in the shop.
Case Study: A Tricky Diagnosis
I remember a 2002 Silverado that came into my bay with a bizarre set of symptoms. The owner complained that his radio would turn on and off randomly, the interior dome light would flicker, and sometimes the power locks wouldn’t respond to the key fob. He had already replaced the battery and checked all the fuses. A quick scan showed a few communication loss codes (U-codes) with various modules. This is a classic sign. Instead of chasing individual components, we went straight to the BCM. After installing a pre-programmed module just like this one, every single electrical issue was resolved. It’s often the central hub, not the individual switches or motors, that’s the root cause.
Is Your GM Vehicle Showing These Symptoms?
A failing BCM can manifest in many ways. If you’re experiencing any of the following, this module is the likely solution:
- ✔ Erratic or non-functioning power windows, mirrors, or door locks
- ✔ The security or anti-theft light stays on, preventing the engine from starting
- ✔ Interior or exterior lights not working correctly (e.g., dome light, headlights)
- ✔ The horn sounds randomly or doesn’t work at all
- ✔ The instrument cluster displays incorrect information or has flickering warning lights
- ✔ Communication-related Diagnostic Trouble Codes (DTCs), such as U0140, U0155, or other U-codes
A Straightforward Guide to BCM Installation
Replacing the BCM is a manageable job for a DIYer with basic tools. Because we handle the programming, you can focus on the physical swap.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on any electrical components.
- Locate the BCM: On most of these trucks and vans, the BCM is located under the driver’s side of the dashboard, near the steering column. On models like the Astro/Safari, it’s typically behind the center dash panel.
- Remove Connectors: Carefully unplug the electrical harness connectors from the old BCM. They have locking tabs that need to be depressed to be released. Do not force them.
- Swap the Module: Unbolt or unclip the old BCM from its mounting bracket and remove it. Install the new, pre-programmed module in its place.
- Reconnect Everything: Plug the electrical connectors firmly into the new BCM until they click into place. Reconnect the negative battery terminal.
- Perform Relearns: Start the vehicle. As noted in our post-install section, you may need a professional scan tool to perform an Airbag System Sync or Brake Pedal Position Relearn if related warning lights appear.
Verified Vehicle Compatibility
This BCM is a direct replacement for part numbers 15063578, 15081796, 15095334, 19208537, DKAK, and DPNU. It is guaranteed to fit the following vehicles:
ASTRO 02-05 (center dash)
BLAZER S10/JIMMY S15 02-05 (center dash)
ESCALADE 02 (under steering column), 4×2
S10/S15/SONOMA 02-04 (center dash)
SAFARI (GMC) 02-05 (center dash)
SIERRA 1500/2500/3500 PICKUP 02 (under steering column)
SIERRA DENALI 02 (under steering column)
SILVERADO 1500/2500/3500 PICKUP 02 (under steering column)
SUBURBAN 1500/2500 02 (under steering column), 4×2 for 1500
TAHOE 02 (under steering column), 4×2
YUKON 02 (under steering column), 4×2
YUKON XL 1500/2500 02 (under steering column), 4×2 for 1500
Important Note: After purchasing, you must provide us with your Vehicle Identification Number (VIN) so we can program the module before shipment. Best of all, there is no core charge—you can keep your old part.
Frequently Asked Questions
Why do I need to provide my VIN?
Your VIN is essential for us to program the BCM with the correct software and vehicle-specific options from GM. This ensures it communicates properly with your truck’s other modules, making the installation plug-and-play and avoiding a trip to the dealer.
Is this a difficult part to install myself?
For someone with basic mechanical skills, the physical installation is straightforward. The BCM is typically held in by a few bolts or clips under the dash. Since we handle the complex programming, the hardest part is already done for you.
What is an Airbag System Sync?
The BCM communicates with the airbag system (SDM). If the airbag light is on after installation, a scan tool procedure called ‘Setup SDM Primary Key in BCM’ is needed to re-establish this secure connection and turn off the light. This is only required if the light appears.
Will this fix my ‘Service 4WD’ light?
While the BCM can be involved in many systems, a ‘Service 4WD’ message is more often related to the Transfer Case Control Module (TCCM) or the encoder motor/sensor on the transfer case. It’s best to diagnose that specific issue before replacing the BCM for that symptom alone.
Do I need to send my old BCM back?
No. This product comes with no core charge. You can keep your original module, which saves you the hassle and cost of return shipping.