Is Your 1998 GM Truck or SUV Running Rough?
If you’re dealing with frustrating issues like stalling, no-start conditions, erratic transmission shifting, poor fuel mileage, or a check engine light that won’t go away, a failing Powertrain Control Module (PCM) is often the culprit. In my 20+ years as a technician, I’ve seen these exact symptoms hundreds of times on late-90s GM vehicles. The PCM is the brain of your engine and transmission, and when it fails, it can cause a cascade of problems that are impossible to ignore. Don’t let a faulty computer keep your reliable truck off the road.
The Direct, Hassle-Free Solution
This is a tested, used OEM Powertrain Control Module that comes ready for installation. The biggest hurdle with replacing a PCM is the expensive programming required at a dealership. We solve that problem for you. Before we ship this module, our experts will program it with the latest GM software updates using the specific Vehicle Identification Number (VIN) from your truck or SUV. This ensures it’s a true plug-and-play solution, saving you hundreds of dollars and a trip to the dealer.
Real-World Diagnostic Story: “A customer’s 1998 GMC Jimmy S15 came into my shop last month with a persistent misfire and a flashing check engine light. They had already replaced the spark plugs, wires, and even the distributor cap. After confirming the mechanical parts were good, I used a noid light to check the fuel injector pulse and found it was dead on one cylinder. The issue wasn’t the injector itself, but a failed driver circuit inside the original PCM—a common failure point. Swapping in a VIN-programmed module like this one resolved the issue in under 15 minutes.”
Why is a Programmed 1998 Blazer S10 PCM the Right Choice?
Getting a module that is specifically flashed for your vehicle is not just a convenience; it’s a necessity for proper function. This service ensures all vehicle-specific parameters, including anti-theft systems (if applicable), transmission shift points, and fuel tables, are correctly loaded.
- ✔ VIN-Programmed for Your Vehicle: We flash the module with your truck’s VIN for seamless communication and operation.
- ✔ No Dealer Visit Required: This module is ready to install right out of the box, saving you time and costly dealership programming fees.
- ✔ Fixes Common Issues: A direct solution for check engine lights, rough idle, poor performance, and shifting problems tied to a faulty ECU.
- ✔ Broad Compatibility: This module replaces several part numbers, making it a versatile fix for many GM trucks and vans from this era.
Simple Plug-and-Play Installation
You can get your vehicle back to factory-spec performance with just basic hand tools. Follow these simple steps:
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting work.
- Locate the PCM: On a 1998 Blazer S10 or Jimmy S15, the PCM is typically located in the engine compartment, on the right-hand (passenger) side, near the firewall or inner fender.
- Disconnect Harnesses: Carefully unclip and remove the electrical connectors from the old module. Inspect the connectors for any corrosion or bent pins and clean them if necessary.
- Swap the Modules: Unbolt and remove the old PCM. Mount the new, programmed module in its place.
- Reconnect Everything: Securely plug the electrical harnesses into the new PCM and reconnect your vehicle’s battery terminal.
- Final Check: Start the vehicle and let it run for a few minutes. It is now ready to drive.
Guaranteed Fitment and Part Number Interchange
This PCM is a direct replacement for a wide range of GM vehicles. To ensure compatibility, please match your original part number to one of the following interchangeable numbers:
Interchangeable Part Numbers: 09355699, 16266645, 16250279, 16258815, 09366810
This unit is confirmed to fit many popular models including, but not limited to:
- SUVs: 1998-99 Chevrolet Tahoe, GMC Yukon; 1999 Cadillac Escalade; 1998 Oldsmobile Bravada, GMC Envoy; 1998 Chevrolet Blazer S10 / GMC Jimmy S15.
- Trucks: 1998-99 Chevrolet & GMC 1500, 2500, 3500 Pickups; 1998 Chevrolet S10 / GMC Sonoma; 1998 Isuzu Hombre.
- Vans: 1998-99 Chevrolet Express & GMC Savana 1500, 2500, 3500; 1998 Chevrolet Astro & GMC Safari.
Please verify the ID number 9355699 on your original module to confirm fitment. After purchase, simply send us your VIN, and we’ll handle the rest!