If you’re dealing with the frustrating and unpredictable electrical problems common in a 1998 GM truck, you’ve come to the right place. As a technician with over two decades of experience, I’ve seen firsthand how a failing Body Control Module (BCM) can turn a reliable vehicle into a source of constant headaches. This isn’t just a simple part; it’s the central nervous system for your truck’s interior features. This replacement Body Control Module, part number 16264870, is the definitive solution to restore your vehicle’s proper function and your peace of mind.
Forget the hassle and expense of a dealership visit. We handle the critical programming for you. Simply provide your vehicle’s VIN during checkout, and our experts will flash this module with the latest GM software specific to your truck. It arrives at your door ready for installation, saving you time, money, and the need for specialized programming equipment. This is the most direct path to fixing those baffling electrical gremlins for good.
Is Your Truck Showing These Symptoms?
A faulty BCM can manifest in numerous ways that often seem unrelated. If you’re experiencing any of the following, a failing BCM is the likely culprit:
- ✔ Intermittent or non-working power windows, door locks, or mirrors.
- ✔ Interior dome lights or exterior lights staying on or not working at all.
- ✔ The security or anti-theft system acting erratically or preventing the engine from starting.
- ✔ Unexplained battery drain that leaves you with a dead battery overnight.
- ✔ Gauges on the instrument cluster behaving strangely or not responding.
- ✔ The radio or other accessories turning on and off by themselves.
Why Our 1998 Isuzu BCM is the Smart Choice
This isn’t just another part; it’s a complete, ready-to-install solution. We’ve built our process around making your repair as simple as possible. By providing a module that is already programmed for your specific 1998 Isuzu BCM requirements, we eliminate the most complex step of the repair. Plus, with our no-core-charge policy, you can keep your original module without worrying about return shipping or extra fees. It’s a straightforward fix designed for both seasoned mechanics and determined DIYers.
From the Diagnostic Bay: The Phantom Electrical Drain
A customer brought in his ’98 S10 with a classic complaint: a dead battery every two days. He’d already replaced the battery and the alternator, but the problem persisted. He was convinced there was a short somewhere in the wiring. After hooking up my multimeter to test for parasitic draw, I saw a significant amp reading that shouldn’t have been there. Instead of tearing the dash apart to chase wires, I went straight for the BCM. By pulling the BCM fuse, the draw vanished. The BCM’s internal circuits had failed, keeping a relay energized even with the key off. A new, programmed BCM solved the problem in under an hour—a fix the owner had been chasing for months.
A Straightforward Guide to Installation
Replacing the BCM is a manageable job for most DIYers. Follow these steps for a successful installation:
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the Module: On most 1998 S10, Blazer, Jimmy, and Sonoma models, the BCM is located behind the passenger side of the dashboard, near the glove box. On the Isuzu Hombre, it’s typically on the driver’s side (LH dash).
- Access the BCM: You will likely need to remove the glove box or a lower dash panel to gain access. A few screws or clips usually hold these panels in place.
- 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 BCM: Mount your new, pre-programmed BCM in the same location and securely reconnect all electrical connectors. You should hear a ‘click’ as they lock into place.
- Final Steps: Reinstall any dash panels you removed and reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all functions (lights, locks, windows, etc.).
Important Post-Installation Information
In some cases, your vehicle may require a couple of final sync procedures after the BCM is installed. These are typically only necessary if a specific warning light appears:
- Airbag System Sync: If the airbag warning light is illuminated after installation, a ‘Setup SDM Primary Key in BCM’ procedure must be performed with a professional-grade scan tool. This syncs the BCM with the airbag system.
- Brake Pedal Position Relearn: On certain models, a brake pedal position sensor recalibration may be needed to ensure correct brake light operation. This also requires a compatible diagnostic tool.
Disclaimer: Vehicle systems can vary. We always recommend consulting a factory service manual or a qualified technician if you are unsure about any step.
Guaranteed Vehicle Compatibility
This module is a direct replacement for part numbers 09366803, 16264870, 16268395, 8093668030, and 8162683950. It is guaranteed to fit the following vehicles:
- ✔ 1998 Chevrolet Blazer S10 (Body Control, center dash)
- ✔ 1998 Chevrolet S10 / GMC Sonoma (Body Control, center dash)
- ✔ 1998 GMC Jimmy S15 (Body Control, center dash)
- ✔ 1998 Isuzu Hombre (Body Control, LH dash)
- ✔ 1998 Oldsmobile Bravada (Body Control, center dash, w/o extended build date)
Frequently Asked Questions
Do I need to program this 1998 Isuzu BCM?
No. We handle all the programming for you before shipment. Just provide your VIN at checkout, and it will arrive ready to install.
What does ‘no core charge’ mean?
It means you do not have to send your old, faulty BCM back to us. This saves you the cost and hassle of return shipping and any additional core deposit fees.
Where is the BCM located on my 1998 S10 or Blazer?
It’s typically mounted behind the dashboard on the passenger side, often accessible by removing the glove box assembly. For the Isuzu Hombre, it is usually on the driver’s side.
What happens if my airbag light turns on after I install it?
This indicates the new BCM needs to be synchronized with the airbag module (SDM). A mechanic with a professional diagnostic tool can perform the ‘Setup SDM Primary Key in BCM’ procedure to resolve this.
Will this fix my truck’s security system issue?
Yes, the BCM is a critical part of the vehicle’s anti-theft and security system. Replacing a faulty BCM is often the correct fix for security-related starting problems.