Restore Full Electrical Function to Your GM Truck or SUV
Are you battling bizarre electrical gremlins in your Silverado, Sierra, S10, or Blazer? Issues like flickering lights, malfunctioning power locks, or an intermittent no-start condition can often be traced back to a single, central component: a failing Body Control Module (BCM). The BCM acts as the central hub for your vehicle’s body electronics, and when it starts to fail, it can create a cascade of frustrating and seemingly unrelated problems. This replacement BCM, part number 09366801, is the definitive solution to restore your truck’s reliability and functionality.
From the Diagnostic Bay
We had a 1999 Chevy Silverado in the shop that was driving the owner crazy. The dome light would randomly turn on while driving, the power locks worked only when they wanted to, and the security light would flash, preventing the truck from starting. The owner had already replaced the battery and checked all the fuses. After connecting our diagnostic scanner, we saw multiple communication fault codes pointing to the BCM. Instead of a dozen separate issues, it was one faulty module. We installed a VIN-programmed GM Truck BCM, and instantly, every single electrical problem was solved. It’s a classic case of one component causing widespread electronic chaos.
Common Symptoms of a Failing GM Truck BCM
- ✔ Erratic or non-functional power windows and locks.
- ✔ The anti-theft or security light stays on or flashes, causing a no-start condition.
- ✔ Interior dome lights, dash lights, or headlights behave unpredictably.
- ✔ Wipers operate intermittently or won’t turn off.
- ✔ Gauges on the instrument cluster drop to zero or give false readings.
- ✔ The radio or climate control system turns on and off by itself.
- ✔ A “Service Vehicle Soon” warning light is illuminated on the dash.
Plug-and-Play Solution: Programmed to Your VIN
Forget expensive trips to the dealership for programming. The biggest hurdle in replacing a BCM is ensuring it communicates correctly with your vehicle’s other electronic systems. We eliminate this step for you. Simply provide us with your vehicle’s 17-digit VIN during checkout, and our technicians will program this module with the latest GM software specific to your truck’s configuration. This ensures that when the part arrives, it’s a true plug-and-play installation, saving you time, money, and the headache of post-install programming.
Installation and Post-Install Considerations
This GM Truck BCM is a direct-fit replacement for the original unit. However, due to the integration of various vehicle systems, a couple of post-installation procedures may be necessary depending on your specific model and its condition:
- Airbag System Sync: If the airbag warning light is illuminated after installation, a simple ‘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: On some models, a brake pedal position sensor recalibration might be needed to ensure proper operation of the brake lights and traction control system.
We always recommend consulting a factory service manual or a qualified technician if you are unsure about any part of the installation process. This module fits a wide range of vehicles, including the Chevy S10, Blazer, Silverado, Astro, GMC S15, Sonoma, Jimmy, Sierra, Safari, Oldsmobile Bravada, and Isuzu Hombre. Please verify your part number (16257125, 09366801, etc.) and check the fitment list to confirm compatibility.
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, such as power windows, locks, lights, wipers, security system, and interior accessories.
Is this BCM difficult to install?
The physical installation is typically straightforward, involving unplugging the old module and plugging in the new one. However, some post-install electronic procedures, like an airbag system sync, may be required and necessitate a professional scan tool.
How do I provide my VIN for programming?
You can add your 17-digit VIN to the notes section during checkout. If you forget, we will contact you via email after your purchase to request it before we can program and ship your module.
Do I need to send my old BCM back?
No. This product has no core charge. You can keep your original module.
What if my airbag light is on after installing the new BCM?
This is a common occurrence. The new BCM needs to be electronically introduced to the airbag system. A technician will need to perform the ‘Setup SDM Primary Key in BCM’ procedure with a diagnostic tool to turn off the light.
Will this module fit my 1999 GMC Sierra?
Yes, this module is compatible with the 1999-2000 GMC Sierra 1500 & 2500, as well as many other GM trucks and SUVs. Always cross-reference your original part number with the numbers listed in our description to ensure a perfect match.