Is Your 1998 GM Truck Experiencing Strange Electrical Problems?
If your 1998 Chevy S10, Blazer, GMC Jimmy, Sonoma, or Oldsmobile Bravada is suffering from a host of baffling electrical issues, a failing Body Control Module (BCM) is the most likely culprit. The BCM is the central command center for your vehicle’s body electronics, controlling everything from your interior lights and power windows to the anti-theft system. When it starts to fail, it can create a cascade of frustrating and seemingly unrelated problems that can be difficult to diagnose.
This is not just a replacement part; it’s a complete, pre-programmed solution. We take your vehicle’s VIN and flash this module with the latest, most stable software updates directly from GM. This ensures that the module you receive is perfectly matched to your truck’s specific options and configuration, eliminating the need for an expensive trip to the dealership for programming. Get your truck’s essential functions back to factory-spec reliability with this direct-fit 1998 Blazer S10 BCM.
We had a ’98 Jimmy S15 come into the shop that was driving the owner crazy. The dome lights would stay on, the radio would randomly shut off, and sometimes the power locks wouldn’t respond to the key fob. He had already replaced the battery and checked all the fuses. After connecting our scan tool, we saw a slew of communication error codes all pointing back to one component: the BCM. The internal logic circuits were failing, sending erratic signals throughout the vehicle. We installed a VIN-programmed BCM just like this one, and it was like flipping a switch. All the strange electrical gremlins vanished instantly. It’s a perfect example of how one central module can affect so many different systems.
Common Symptoms of a Failing 1998 Blazer S10 BCM
A faulty Body Control Module can manifest in numerous ways. If you’re noticing any of the following issues, it’s a strong indicator that your BCM needs replacement:
- ✔ Intermittent or non-working power windows, door locks, or mirrors.
- ✔ Dome lights, dash lights, or headlights staying on or not turning on at all.
- ✔ The radio or climate control system behaving erratically or shutting down.
- ✔ Issues with the PASSLOCK anti-theft system, causing a no-start condition.
- ✔ False warnings on the instrument cluster, such as a ‘door ajar’ light that won’t turn off.
- ✔ Wipers operating incorrectly or not parking in the correct position.
- ✔ Inconsistent or non-functional keyless entry remote.
The Direct and Reliable Solution
Don’t let a faulty module keep your truck off the road. This replacement BCM is the definitive fix for these widespread issues. We handle the complex part for you by programming the unit to your specific VIN before it ships. This means a simpler installation process and a higher likelihood of a first-time fix. There is no core charge, so you can keep your original module without the hassle of shipping it back.
Installation and Post-Install Procedures
This module is located in the center dash area on most models. While the physical installation is straightforward for a DIYer with basic tools, some vehicles may require additional electronic procedures after the new BCM is connected. Please be aware of the following potential requirements:
- Airbag System Sync: If your airbag warning light illuminates after installation, a ‘Setup SDM Primary Key in BCM’ procedure is necessary. This requires a professional-grade scan tool to sync the new BCM with the airbag system’s Sensing and Diagnostic Module (SDM).
- Brake Pedal Position Relearn: In some cases, a brake pedal position sensor recalibration may be needed to ensure your brake lights and traction control system function correctly.
Disclaimer: Specific procedures can vary by vehicle. Always consult a factory service manual or a qualified technician for guidance.
Guaranteed Fitment
This module is a direct replacement for the following part numbers and fits the specified vehicles:
- Part Numbers: 09366803, 16264870, 16268395, 8093668030, 8162683950
- Compatible Vehicles:
- 1998 BLAZER S10/JIMMY S15 (Body Control, center dash, ID 16268395, 9366803, or 16264870)
- 1998 BRAVADA (Body Control, center dash, w/o extended build date)
- 1998 ISUZU HOMBRE (Body Control, LH dash)
- 1998 S10/S15/SONOMA (Body Control, center dash, ID 16268395)
Frequently Asked Questions
Is this BCM truly plug-and-play?
Because we program the module to your vehicle’s VIN before shipping, it eliminates the need for dealership programming. However, as noted, some vehicles may require a post-installation procedure like an airbag system sync or brake pedal relearn, which requires a professional scan tool.
Where is the BCM located on a 1998 S10 Blazer?
On the 1998 S10 Blazer and related models like the Jimmy and Sonoma, the Body Control Module is typically located behind the passenger side of the dashboard, near the glove box area.
What happens if I don’t provide my VIN?
Providing your VIN is mandatory for this part. We cannot ship the module without programming it, as it will not function correctly in your vehicle. After your purchase, please send us your 17-digit VIN to avoid delays.
Do I need to return my old BCM?
No, there is no core charge for this item. You can keep your original module, which saves you the time and expense of return shipping.
Will this fix my PASSLOCK security system issue?
A faulty BCM is a very common cause of PASSLOCK anti-theft system problems, including the ‘Security’ light being on and a no-start condition. Replacing the BCM with a correctly programmed unit often resolves these issues.