Are you battling frustrating electrical problems in your GM truck? Flickering lights, unresponsive power windows, a security system that acts on its own, or warning lights that won’t go away are common signs of a failing Body Control Module (BCM). The BCM is the central command center for your truck’s body electronics, and when it fails, it can cause a cascade of confusing issues. This replacement Body Control Module, part number 191583625, is the definitive solution for your 1999-2000 GMC Sierra, Chevy Silverado, and other compatible GM vehicles.
Forget expensive trips to the dealership and the hassle of finding a shop that can program a new module. We take care of the hard part for you. Simply provide your vehicle’s VIN during checkout, and our technicians will program this BCM with the latest GM software specific to your truck. It arrives at your door ready for a straightforward installation, restoring the functionality you depend on every day.
From the Diagnostic Bay
We had a 2000 Sierra 1500 come into the shop with the owner at his wit’s end. The dome lights would stay on, the power locks worked intermittently, and the radio would sometimes refuse to turn off after he took the key out. He had already replaced the door jamb switches and the ignition switch, spending hundreds on parts that didn’t solve the problem. After a quick scan, we saw multiple communication codes pointing to the BCM. The internal circuits were failing, causing these ghost-like problems. We installed one of our pre-programmed BCMs, and within 30 minutes, every single issue was resolved. It’s a classic case where the central ‘brain’ was the problem, not the individual components it controls.
Symptoms of a Failing Body Control Module
- ✔ Intermittent or non-working power windows, door locks, and mirrors.
- ✔ Interior or exterior lights that stay on, flicker, or don’t turn on at all.
- ✔ Erratic behavior from the vehicle’s security system or horn.
- ✔ Radio or climate control systems malfunctioning.
- ✔ Inaccurate gauge readings on the instrument cluster.
- ✔ Warning lights, such as the airbag light, illuminating on the dash.
- ✔ Problems with the keyless entry system.
Why Choose Our Programmed 1999-2000 Sierra BCM?
This isn’t just a replacement part; it’s a complete, plug-and-play solution. Each module is meticulously inspected and then programmed using your truck’s unique Vehicle Identification Number (VIN). This ensures perfect compatibility with your vehicle’s specific options and systems, just like the original module from the factory. By flashing it with the latest GM-released software updates, we also resolve potential bugs and improve performance over your old, outdated unit. This attention to detail guarantees a seamless integration and restores your vehicle’s electronics to proper working order.
Installation and Post-Install Procedures
Installation is typically straightforward. The BCM is usually located under the driver’s side of the dashboard. Disconnect the negative battery terminal, carefully unplug the electrical connectors from the old BCM, unbolt it, and install the new one in its place. Reconnect everything and you’re nearly done.
Important: While this module is programmed for your VIN, some vehicle systems may require a ‘handshake’ with the new BCM. Please be aware of the following potential procedures:
- Airbag System Sync: If your airbag warning light is on after installation, a ‘Setup SDM Primary Key in BCM’ procedure is necessary. This requires a professional-grade scan tool to sync the new BCM with the airbag system’s Sensing and Diagnostic Module (SDM).
- Brake Pedal Position Relearn: On some models, a recalibration of the brake pedal position sensor may be needed to ensure correct brake light operation and traction control function.
We also make the process easier with a no core charge policy. You don’t need to worry about the cost or hassle of sending your old, faulty module back to us. Keep your original part.
Frequently Asked Questions
What does a Body Control Module (BCM) do?
The BCM is a computer that manages and controls many of your vehicle’s non-engine related electronic functions. This includes power windows, power locks, interior and exterior lighting, the security system, wipers, and sometimes even the climate controls and radio.
Is this a plug-and-play part?
Yes, this is a plug-and-play solution. We program the module to your vehicle’s VIN before shipping, so it’s ready for installation without needing a trip to the dealer. However, as noted, some models may require a simple relearn procedure for the airbag or brake systems after installation.
What information do you need from me?
After you place your order, you must provide us with your 17-digit Vehicle Identification Number (VIN). This is essential for us to program the BCM correctly for your truck’s specific features and configuration.
Where is the BCM located on my 1999-2000 Sierra or Silverado?
On most 1999-2000 GM full-size trucks like the Sierra and Silverado, the BCM is located under the driver’s side of the dashboard, to the left of the steering column.
Do I need to send my old BCM back?
No. There is no core charge for this part. You can keep your original module, which saves you the time and expense of a core return.
Will this BCM fix my airbag light?
If the airbag light is on due to a fault within your old BCM, this new module will resolve the root cause. However, after installation, the new BCM must be synced with the airbag system using a professional scan tool to turn off the light, as described in the post-installation procedures.