Restore Control and End Electrical Frustration in Your GM Truck
If you’re dealing with a 1998 Blazer, Jimmy, or Sonoma that seems to have a mind of its own, you’re not alone. Flickering lights, malfunctioning power accessories, and a stubborn security system are classic signs of a failing Body Control Module (BCM). As the central hub for your truck’s body electronics, a faulty BCM can cause a cascade of frustrating and unpredictable problems. This isn’t just an annoyance; it can affect vehicle security and safety. This replacement 1998 Blazer S10 BCM is the direct, reliable solution to get your truck back in order.
We take the guesswork and dealer expense out of the equation. Before we ship your module, we program it with the latest GM software updates using the VIN you provide. This ensures it’s perfectly matched to your vehicle’s specific configuration, making installation as straightforward as possible. Forget about costly dealership appointments for programming—this module arrives ready to work.
From the Diagnostic Bay
I remember a ’98 Jimmy S15 that came into my shop with what the owner called “the ghost.” The dome light would randomly come on while driving, the radio would shut off, and sometimes the power locks wouldn’t respond. He’d already replaced the battery and checked fuses. After hooking up the scanner, I saw communication loss codes with multiple accessory systems, all pointing back to one culprit. We swapped in a pre-programmed BCM, and just like that, the ghost was gone. These modules are notorious for causing these exact kinds of baffling issues due to internal circuit board failures over time.
Common Signs of a Failing BCM
- ✔ Erratic or non-functional power windows, door locks, or mirrors.
- ✔ The security or anti-theft light stays on or flashes, preventing the engine from starting.
- ✔ Interior or exterior lights flicker, stay on, or don’t work at all.
- ✔ Dashboard gauges behaving erratically or not working.
- ✔ The horn honking unexpectedly or not working when pressed.
- ✔ Problems with the radio or climate control functions.
A Straightforward Guide to Installation
- ✔ Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- ✔ Locate the BCM: On most 1998 S-Series trucks, the BCM is located in the center of the dashboard, often behind the glove box or a lower dash panel. You may need to remove a few trim panels to access it.
- ✔ Disconnect and Remove: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the module from its mounting bracket.
- ✔ Install the New Module: Mount your new, pre-programmed BCM in the same location and securely reconnect all the electrical harnesses.
- ✔ Reconnect and Test: Reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all functions like windows, locks, lights, and radio to ensure proper operation.
Important Post-Installation Notes
While this module is programmed for your VIN, some vehicle systems may require a ‘handshake’ with the new BCM. If your airbag warning light is illuminated after installation, a professional scan tool is needed to perform the “Setup SDM Primary Key in BCM” procedure. Additionally, a Brake Pedal Position relearn may be necessary on some models to ensure proper brake light and traction control operation. Always refer to a factory service manual for your specific vehicle if you are unsure.
Will This Fit My Truck?
This BCM is a direct-fit replacement for the following vehicles and part numbers. Please verify your part number or contact us with your VIN to confirm compatibility.
- ✔ 1998 Chevrolet Blazer S10: Body Control (BCM); (center dash), ID 16268395, 9366803, or 16264870
- ✔ 1998 GMC Jimmy S15: Body Control (BCM); (center dash), ID 16268395, 9366803, or 16264870
- ✔ 1998 Chevrolet S10 / GMC Sonoma: Body Control (BCM); (center dash), ID 16268395
- ✔ 1998 Oldsmobile Bravada: Body Control (BCM); (center dash), w/o extended build date
- ✔ 1998 Isuzu Hombre: Body Control (BCM); (LH dash)
- Compatible Part Numbers: 16268395, 09366803, 16264870, 8093668030, 8162683950
What information do you need to program the BCM?
After you place your order, we will need your 17-digit Vehicle Identification Number (VIN) to program the module correctly. This ensures it matches your truck’s factory options.
Is this a plug-and-play part?
For most functions, yes. Because we pre-program it to your VIN, it eliminates the need for a trip to the dealer for initial programming. However, as noted, certain systems like the airbag (SRS) may require a synchronization procedure with a scan tool if the warning light appears.
Do I need to send my old BCM back?
No, there is no core charge for this part. You can keep your original module.
Will this fix my truck’s no-start problem?
It can. A common failure in the 1998 Blazer S10 BCM is a fault in the Passlock anti-theft system, which will prevent the vehicle from starting. If your ‘Security’ light is on, this module is a very likely solution.
Where is the BCM located on my 1998 Jimmy?
The Body Control Module is typically found behind the passenger side of the dashboard, often accessible by removing the glove box assembly. It’s a black box with multiple large electrical connectors.