Is Your GM Truck or SUV Experiencing Bizarre Electrical Problems?
If you’re dealing with flickering lights, malfunctioning power windows, or a security system with a mind of its own, you’re likely facing a failing Body Control Module (BCM). The BCM is the central command center for your vehicle’s body electronics, and when it starts to go, it can cause a cascade of frustrating and seemingly unrelated issues. This isn’t just an inconvenience; it can affect the safety and reliability of your vehicle. Stop chasing individual component failures and address the root cause with a reliable, pre-programmed BCM.
From the Diagnostic Bay
We had a 1999 Silverado in the shop that was driving its owner crazy. The passenger window wouldn’t work, the dome light stayed on, and the horn would randomly honk when using the key fob. The owner had already replaced the window switch and the motor with no luck. After connecting our diagnostic tool, we saw multiple communication fault codes pointing back to one source: the BCM. Instead of continuing to replace parts, we installed a VIN-programmed BCM. Instantly, all the strange electrical gremlins vanished. It’s a classic case of symptoms appearing all over the vehicle, but the actual problem lies within this single central module.
Common Symptoms of a Failing BCM
- ✔ Erratic or non-functional power windows, door locks, and mirrors.
- ✔ Interior or exterior lights that won’t turn on or off correctly.
- ✔ The security system or keyless entry failing to work or engaging randomly.
- ✔ Dashboard warning lights illuminating for no apparent reason.
- ✔ Intermittent stalling or no-start conditions related to the anti-theft system.
- ✔ Communication errors with other modules when scanned with a diagnostic tool.
The Direct-Fit Solution: A Programmed 1998-2000 GM BCM
Don’t settle for a junkyard part that will require expensive dealer programming. We offer a comprehensive solution. This Body Control Module is not just a replacement part; it’s a fully prepared component for your specific vehicle. When you place your order, you provide us with your Vehicle Identification Number (VIN). Our technicians then flash the module with the latest, most stable software updates directly from GM, ensuring it matches your vehicle’s exact configuration and options. This process eliminates the need for a trip to the dealership, saving you significant time and money.
Installation and Post-Install Procedures
This BCM is typically located behind the dashboard, either in the center or on the driver’s side (LH dash). While installation is a direct swap, please be aware of potential post-installation steps. Depending on your specific model and its options, some additional procedures may be necessary to ensure all systems communicate correctly.
- Airbag System Sync: If your airbag warning light is on after installation, a ‘Setup SDM Primary Key in BCM’ procedure is required. This syncs the new BCM with the airbag system’s Sensing and Diagnostic Module (SDM) and must be performed with a professional-grade scan tool.
- Brake Pedal Position Relearn: Some models may require a recalibration of the brake pedal position sensor to ensure correct brake light operation and to satisfy the traction control system.
Always consult a factory service manual or a qualified technician for guidance specific to your vehicle.
Guaranteed Fitment
This module is a direct replacement for part number 16257125 and other interchangeable numbers including 19153625, 8191536250, 191583625, 8093668010, 8162571250, and 09366801. It is confirmed to fit the following vehicles:
- 1998-2000 S10/S15/Sonoma
- 1998-2000 Blazer S10/Jimmy S15
- 1999-2000 Sierra & Silverado 1500/2500
- 2000 Astro & Safari
- 1998 Bravada (w/ extended build date opt ZN4)
- 1999-2000 Isuzu Hombre
Frequently Asked Questions
Do I need to send my old BCM back?
No, there is no core charge for this part. You can keep your original module.
Is this BCM truly plug-and-play?
Yes, it is pre-programmed to your VIN. However, as noted, some vehicles may require additional relearn procedures for the airbag or brake systems, which need a professional scan tool.
What information do you need from me?
After you place your order, we will need the 17-digit Vehicle Identification Number (VIN) from your truck or SUV to program the module correctly.
Will this fix my security system issues?
A faulty BCM is a very common cause of security system problems, including the Passlock anti-theft system. This VIN-programmed module is designed to restore that functionality.
What happens if the airbag light comes on after I install it?
This indicates the new BCM needs to be synced with the airbag module (SDM). A mechanic with a bi-directional scan tool can perform the ‘Setup SDM Primary Key in BCM’ procedure to resolve this.