Are you chasing electrical gremlins in your GM truck or SUV? Intermittent power windows, flickering dome lights, a security system that acts up, or power locks with a mind of their own are classic signs of a failing Body Control Module (BCM). As the central hub for your vehicle’s body electronics, a faulty BCM can cause a cascade of frustrating and seemingly unrelated problems. Stop swapping relays and checking fuses—get the definitive solution right here.
This is a direct-fit replacement BCM, a vital component for restoring full functionality to your vehicle. The best part? We handle the complex part for you. Before we ship, our technicians will program this module to your vehicle’s specific VIN using the latest GM software updates. This means it arrives at your door ready for installation, saving you a costly trip to the dealership and the hassle of specialized programming tools. It’s the most efficient way to get your truck back to 100%.
Case Study: A Tricky Diagnosis
I remember a 2000 GMC Sierra 1500 that came into my shop with a bizarre complaint. The owner said his radio presets would randomly wipe, the interior lights would stay on, and sometimes the truck wouldn’t start, showing a ‘Security’ light. He had already replaced the battery and checked the grounds. After hooking up my scanner, I saw multiple U-series communication codes, pointing to a network issue. Instead of a bad wire, the culprit was an internally failing BCM that was corrupting the data bus. A new, programmed BCM like this one solved all the issues in one shot. It’s a fix I’ve performed hundreds of times on these otherwise rock-solid trucks.
Is Your Truck 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-functional power windows, mirrors, and door locks.
- ✔ Interior dome or courtesy lights that won’t turn on or off correctly.
- ✔ The security system light flashing, preventing the engine from starting.
- ✔ Horn or alarm sounding randomly.
- ✔ Instrument panel warning lights illuminating without cause.
- ✔ Communication error codes (often U-codes) when scanned with a diagnostic tool.
A Straightforward Guide to Installation
Installing your new BCM is a manageable job for a DIYer with basic tools. While the exact location can vary, it’s typically found in the dash.
- 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 S10/Blazer models, it’s in the center dash area. For Silverado/Sierra and Astro/Safari models, it’s usually on the driver’s side (LH) of the dash. You may need to remove a lower dash panel for access.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the module from its mounting bracket.
- Install the New Module: Mount your new, pre-programmed BCM in the same location and securely plug in all the electrical connectors. You’ll hear a click as they lock 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 the repair.
Important Post-Installation Information
Because this module is central to many systems, a couple of additional steps may be required after installation:
- ✔ Airbag System Sync: If the airbag warning light is on after you’ve installed the BCM, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure. This syncs the new BCM with the airbag system.
- ✔ Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration might be necessary to ensure proper brake light and traction control operation.
Disclaimer: Procedures can vary by exact make and model. Always consult a factory service manual or a qualified technician if you are unsure.
Will This Fit My Truck?
This module is a guaranteed fit for the following vehicles, replacing part numbers 19153625, 8191536250, 16257125, 191583625, 8093668010, 8162571250, and 09366801. Please provide your VIN upon purchase for programming.
BLAZER S10/JIMMY S15 98-00 (center dash, ID 16257125)
SAFARI (GMC) 00 (LH dash)
ASTRO 00 (LH dash)
SIERRA 1500/2500 PICKUP 99-00 (LH dash)
SILVERADO 1500/2500 PICKUP 99-00 (LH dash)
BRAVADA 98 (center dash, w/extended build date opt ZN4)
ISUZU HOMBRE 99-00 (LH dash)
Frequently Asked Questions
Frequently Asked Questions
What exactly does a Body Control Module do?
The BCM is a computer that controls most of the non-engine related electronic accessories in your vehicle. This includes power windows, locks, interior lighting, the security system, wipers, and the horn, among other things.
Why do you need my VIN number?
Your Vehicle Identification Number (VIN) allows us to program the BCM with the specific software and settings for your truck’s exact options and configuration. This ensures it works correctly right out of the box without needing a dealer visit.
Is this part difficult to install for a DIYer?
For most people with basic hand tools, this is a very manageable job. The main task is accessing the module, which is typically located under the dashboard. The physical swap is just a few bolts and electrical connectors.
What if my airbag light comes on after installation?
This can happen occasionally. It means the new BCM needs to be electronically ‘introduced’ to the airbag module (SDM). A repair shop with a professional-grade scan tool can perform the ‘Setup SDM Primary Key’ procedure in a few minutes to resolve this.
Do I need to send my old BCM back?
No. We do not require you to return your original module. There is no core charge associated with this purchase, simplifying the process for you.