Restore Control Over Your Vehicle’s Electronics
Are you dealing with baffling electrical issues in your GM truck or SUV? Flickering interior lights, power windows with a mind of their own, or a security system that acts up randomly are classic signs of a failing Body Control Module (BCM). As the central hub for your vehicle’s body-related accessories, a faulty BCM can make driving a frustrating experience. This isn’t just an inconvenience; it can affect critical systems. This replacement BCM is the definitive solution, arriving at your door pre-programmed with the latest GM software specifically for your vehicle’s VIN.
Is Your Truck Showing These Symptoms?
A failing BCM can manifest in numerous ways. Over my 20 years in diagnostics, I’ve seen these modules cause some of the most confusing problems. Here’s what to look for:
- ✔ Erratic or non-functional power windows, door locks, and mirrors.
- ✔ Interior dome lights or dashboard lights staying on or not turning on at all.
- ✔ The security or anti-theft system preventing the engine from starting (Passlock issues).
- ✔ Horn honking unexpectedly or not working when pressed.
- ✔ Inconsistent wiper operation.
- ✔ Communication error codes (U-codes) when scanned with a diagnostic tool.
Case Study: A Tricky Diagnosis
I remember a 2000 Silverado 1500 that came into the shop with an intermittent no-start and a dome light that would flicker while driving. The owner had already replaced the battery and alternator. A basic scan showed no engine codes, but a deeper network test revealed intermittent communication loss with the BCM. We found that a failing solder joint inside the original module was causing voltage drops, tricking the Passlock system into activating and creating the bizarre lighting issue. Replacing the BCM with a properly programmed unit like this one solved both problems instantly. It’s often the central component you least suspect.
The Smart Solution: Pre-Programmed for Your Vehicle
The biggest hurdle when replacing a modern vehicle computer is the programming. Traditionally, you’d have to install the part and then have your vehicle towed to a dealership for expensive software flashing. We eliminate that step entirely. Simply provide us with your vehicle’s VIN during checkout, and our technicians will program this 1999-2000 GM BCM with the newest, most stable software from GM. It arrives ready for installation, saving you significant time, money, and hassle.
A Straightforward Guide to Installation
For the confident DIYer or professional technician, swapping the BCM is a manageable job. The location can vary, so always confirm for your specific model.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on any electronic components.
- Locate the BCM: On models like the S10, Blazer, and Bravada, it’s typically behind the center of the dash. On Silverado, Sierra, Astro, and Safari models, it’s usually found on the driver’s side (LH dash), often near the steering column.
- Access the Module: You may need to remove lower dash panels or the glove box to gain clear access. A trim removal tool can prevent damage to plastic panels.
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the old BCM and remove it from its bracket.
- Install the New BCM: Mount your new, pre-programmed module in the same location and securely reconnect all electrical harnesses. You should hear a ‘click’ as they lock into place.
- Final Steps: Reassemble your dashboard panels and reconnect the negative battery terminal.
Important Post-Installation Information
While this module is programmed for your VIN, some vehicle systems may require a ‘handshake’ procedure after installation. Please be aware of the following possibilities:
- ✔ Airbag System Sync: If your airbag warning light is illuminated after installation, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure. This syncs the new BCM with the airbag module.
- ✔ Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration might be necessary to ensure correct brake light and traction control operation.
Disclaimer: Specific procedures can vary. We always recommend consulting a factory service manual or a qualified technician for guidance.
Will This Fit My Vehicle?
This module is a direct replacement for part number 16257125 and several other interchangeable part numbers. Please verify your original part number or confirm your vehicle is on the list below. This part is compatible with the following part numbers: 19153625, 8191536250, 16257125, 191583625, 8093668010, 8162571250, 09366801.
- ✔ Astro Van: 2000 (LH dash)
- ✔ Blazer S10 / Jimmy S15: 1998-2000 (center dash, ID 16257125)
- ✔ Bravada: 1998 (center dash, w/ extended build date opt ZN4)
- ✔ Isuzu Hombre: 1999-2000 (LH dash)
- ✔ S10 / S15 / Sonoma Pickup: 1998-2000 (center dash, ID 16257125)
- ✔ Safari (GMC): 2000 (LH dash)
- ✔ Sierra 1500/2500 Pickup: 1999-2000 (LH dash)
- ✔ Silverado 1500/2500 Pickup: 1999-2000 (LH dash)
Frequently Asked Questions
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.
Is this a plug-and-play part?
Yes, for the most part. We program it to your VIN, so it’s ready to install without needing a dealer visit for programming. However, as noted, some vehicles may require a simple relearn procedure for the airbag or brake pedal sensor after installation.
How do I provide my VIN?
After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). We cannot program and ship your BCM without it.
What if my original part number isn’t 16257125?
This module is a direct replacement for a range of part numbers, including 19153625, 8191536250, and 09366801, among others listed above. As long as your vehicle and original part number match our fitment list, it will work correctly.
Will this fix my truck not starting?
It can. The BCM often controls the vehicle’s anti-theft system (Passlock). If the BCM is faulty, it can prevent the engine from starting. If your no-start issue is accompanied by other electrical symptoms, a failing BCM is a very likely cause.