Are you tired of chasing electrical gremlins in your GM truck or SUV? One minute the power windows work, the next they don’t. The security light flashes randomly, the interior lights have a mind of their own, or worse, the vehicle won’t start. As a technician with over two decades of experience, I’ve seen these exact issues hundreds of times, and the culprit is almost always a failing Body Control Module (BCM). This isn’t just an annoyance; it’s a breakdown of your vehicle’s central nervous system for body electronics.
This isn’t just a replacement part; it’s a complete, hassle-free solution. We are offering a reliable Body Control Module, part number 9371990 (also compatible with 19208539 and 9385236), that arrives at your door fully programmed to your vehicle’s specific VIN. Forget expensive trips to the dealership for programming. Simply provide us with your VIN at checkout, and our experts will flash the module with the latest GM software updates. This ensures seamless integration and restores your vehicle’s functions to factory specifications.
Case Study: A Tricky Diagnosis
I remember a 2000 Silverado 1500 that came into the shop with the classic complaint: “It’s possessed.” The dome lights would flicker while driving, the radio would cut out, and the security light would stay on, preventing it from starting intermittently. The owner had already replaced the battery and alternator with no luck. After hooking up my scan tool, I saw a slew of U-codes (communication errors) pointing to a network problem. The tell-tale sign was the erratic behavior of multiple, unrelated systems. We traced it back to the BCM, which was failing internally and corrupting the data bus. Installing a VIN-programmed BCM like this one solved every single issue in under an hour. It’s often the central hub of these frustrating electrical faults.
Is Your GM Truck Showing These Symptoms?
A failing BCM can cause a wide range of confusing electrical problems. If you’re experiencing any of the following, this module is the likely solution:
- ✔ Erratic or non-functional power windows, door locks, or mirrors
- ✔ Interior or exterior lights staying on or not working at all
- ✔ The security or anti-theft light is on, causing a no-start condition
- ✔ Intermittent operation of the radio or instrument cluster gauges
- ✔ False warning messages on the driver information center
- ✔ Communication DTCs (Diagnostic Trouble Codes) like U1000, U1016, or U1041
- ✔ Issues with the heating and A/C blower motor controls
A Straightforward Guide to BCM Installation
Installing your new BCM is a manageable job for a DIYer with basic tools. While locations vary slightly, this general guide will help you get it done right.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes to ensure all systems are powered down.
- Locate the BCM: On most full-size trucks and SUVs from this era (Tahoe, Silverado, Suburban), the BCM is located under the driver’s side of the dashboard, to the left of the steering column. On S-series trucks (Blazer, S10), it’s often behind the center dash/glove box area.
- Remove Connectors: Carefully unplug the multiple electrical connectors from the old BCM. They have locking tabs that need to be depressed. Do not force them. Note their colors and orientation.
- Swap the Module: Unbolt or unclip the old BCM from its mounting bracket. Install the new, pre-programmed module in its place.
- Reconnect Everything: Plug all the electrical connectors firmly into the new BCM. Reconnect the negative battery terminal.
- Post-Install Checks: Start the vehicle and test all functions: windows, locks, lights, radio, etc. Please read the important post-installation notes below.
Important Post-Installation Information
Because this module is pre-programmed, most vehicles will be ready to go. However, in some cases, additional steps may be needed:
- Airbag System Sync: If your airbag warning light is on after installation, a professional scan tool is required 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 correct brake light and traction control operation.
Disclaimer: Vehicle systems vary. We always recommend consulting a factory service manual or a qualified technician if you are unsure about any step.
Verified Vehicle Compatibility List
This module is a direct-fit replacement for units with service numbers 19208539, 9371990, or 9385236. Please match your part number or vehicle from the list below to ensure compatibility.
- Chevrolet Tahoe (2000): LH dash mount, ID 9385236
- Chevrolet Suburban 1500/2500 (2000): LH dash mount, ID 9385236
- Chevrolet Silverado 1500/2500 Pickup (2000): LH dash mount, ID 9371990 or 9385236
- GMC Yukon / Yukon XL 1500/2500 (2000): LH dash mount, ID 9385236
- GMC Sierra 1500/2500 Pickup (2000): LH dash mount, ID 9371990 or 9385236
- Chevrolet S10 / GMC Sonoma (2001): Center dash mount
- Chevrolet Blazer / GMC Jimmy (2001): Center dash mount, ID 9385236
- Oldsmobile Bravada (2001): Center dash mount
- Chevrolet Astro / GMC Safari (2001): LH dash mount
Frequently Asked Questions
Do I need to return my old BCM?
No. There is absolutely no core charge for this part. You can keep your original module.
What exactly is VIN programming?
VIN programming means we load your vehicle’s unique 17-digit Vehicle Identification Number into the module before shipping. This ensures the BCM has the correct software and settings for your truck’s specific options, making installation much simpler.
Is this a difficult part to replace myself?
For most DIYers with some experience, this is a very manageable repair. The main challenge is often just accessing the module under the dashboard. Since we handle the programming, the technical side is plug-and-play.
What if the airbag light comes on after I install it?
This can happen occasionally. It means the new BCM needs to be electronically ‘introduced’ to the airbag module (SDM). A repair shop with a high-end diagnostic tool can perform the ‘Setup SDM Primary Key’ procedure in a few minutes to resolve this.
Will this fix my power windows and locks?
Yes, the BCM directly controls the body accessories. If your windows, locks, and interior lights are all acting up, a faulty BCM is the most common cause, and this part is designed to fix that.