Restore Your Truck’s Electrical System with a Plug-and-Play Solution
Are you chasing electrical gremlins in your 1998 Chevy Blazer, GMC Jimmy, or S10/Sonoma? Flickering lights, intermittent power windows, a security light that won’t turn off, or a frustrating no-start condition can all point to a single culprit: a failing Body Control Module (BCM). As the central command center for your vehicle’s body electronics, when the BCM goes down, it can create a cascade of confusing and annoying problems. I’ve seen it countless times in my shop—what seems like multiple separate issues is often just this one component failing.
This isn’t just another part. This is a fully programmed, ready-to-install 1998 Blazer BCM. We take the guesswork and hassle out of the repair. Simply provide us with your vehicle’s VIN during checkout, and our technicians will flash the module with the latest GM software specific to your truck. This means no expensive trips to the dealership for programming. You get a reliable, direct-fit module that restores function right out of the box.
A Technician’s Notebook: The Ground Wire That Fooled Everyone
A customer brought in a ’98 Jimmy S15 with a classic case of what looked like BCM failure—the radio would cut out, interior lights would dim randomly, and the power locks were possessed. He had already bought a BCM from a junkyard, which didn’t fix it. Before condemning his original module, I did a voltage drop test on the main BCM ground circuit. Sure enough, a corroded ground point behind the kick panel was the real issue. It’s a crucial reminder: always check your grounds! A bad ground can starve a module of power, making it act faulty. This simple check can save you from replacing a perfectly good part.
Is Your Truck Showing These Symptoms?
A failing BCM can manifest in various ways. If you’re experiencing any of the following, this module is the likely solution:
- ✔ Erratic or non-functional interior/exterior lights
- ✔ Power windows, door locks, or mirrors working intermittently
- ✔ The security system engaging incorrectly or causing a no-start
- ✔ Inaccurate gauge readings or warning lights staying on
- ✔ Remote keyless entry failure
- ✔ Communication issues between different vehicle modules
A Straightforward Guide to Installation
Installing your new 1998 Blazer BCM is a manageable job for a confident DIYer. The module is typically located behind the center of the dashboard.
- Step 1: Safety First
Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work. - Step 2: Access the Module
You will need to remove the necessary dash trim panels to access the BCM. It’s usually mounted to a bracket in the center dash area (or on the driver’s side on an Isuzu Hombre). - Step 3: Disconnect and Remove
Carefully unplug the electrical connectors from the old BCM. Note their orientation. Then, unbolt the module from its mounting bracket. - Step 4: Install the New BCM
Mount your new, pre-programmed BCM onto the bracket and securely plug in all the electrical connectors. - Step 5: Reconnect and Test
Reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all related functions—lights, locks, windows, etc.—to confirm the repair.
Post-Installation Note: In some cases, additional steps may be needed. If your airbag light is on, a professional scan tool is required to perform the ‘Setup SDM Primary Key in BCM’ procedure. A brake pedal position relearn may also be necessary. Always refer to a factory service manual for specifics.
Verified Vehicle Compatibility
This module is a direct replacement for part numbers 09366803, 16264870, 16268395, 8093668030, and 8162683950. It is guaranteed to fit the following 1998 models:
- ✔ 1998 Chevrolet Blazer S10 / GMC Jimmy S15 (with ID 16268395, 9366803, or 16264870)
- ✔ 1998 Chevrolet S10 / GMC Sonoma (with ID 16268395)
- ✔ 1998 Oldsmobile Bravada (w/o extended build date)
- ✔ 1998 Isuzu Hombre
Frequently Asked Questions About the 1998 Blazer BCM
Frequently Asked Questions
Do I need to send my old BCM back?
No, there is no core charge for this module. You can keep your original part.
Is this part difficult to install?
Installation is straightforward for those with basic mechanical skills. It involves removing some dash panels to access the module, which is located in the center dash area. No special tools are required for the physical swap.
What does ‘VIN Programmed’ mean?
It means we load the module with the specific software and settings for your exact vehicle using the VIN you provide. This ensures it communicates correctly with your truck’s other systems, saving you a costly trip to the dealer for programming.
What if my airbag light comes on after installation?
This can happen occasionally. It means the new BCM needs to be synced with the airbag’s Sensing and Diagnostic Module (SDM). This requires a ‘Setup SDM Primary Key’ procedure, which must be performed with a professional-grade diagnostic tool.
Will this fix my check engine light?
No, the BCM primarily controls body electronics like lights, windows, and security. The check engine light is controlled by the Engine Control Module (ECM) or Powertrain Control Module (PCM).