Get Your Workhorse Running Right
When your 1998 Chevrolet Express 3500 is down, every minute costs you time and money. A faulty Powertrain Control Module (PCM) can bring your entire operation to a halt with frustrating issues like stalling, rough running, or a complete no-start condition. This isn’t just an inconvenience; it’s a threat to your livelihood. We provide the reliable, straightforward solution to get your van off the lift and back on the job. This replacement PCM is professionally programmed with the latest GM software updates specifically for your vehicle’s VIN, ensuring a perfect match and restoring the dependable performance you count on.
Common Symptoms & Your Solution
If you’re experiencing any of the following, a failing engine computer is the likely culprit. This unit is the definitive solution for:
- Check Engine Light with communication error codes (e.g., U-codes)
- Engine stalling or cutting out unexpectedly
- No-start or hard-start conditions
- Poor fuel economy and reduced engine power
- Erratic transmission shifting or gear hunting
- Intermittent electrical or sensor-related issues
Features & Benefits
- ✔ VIN-Programmed for Your Van: Arrives ready to install with the latest GM software flashed specifically to your 1998 Chevy Express 3500. No extra programming needed.
- ✔ Plug-and-Drive Installation: Simply disconnect the old module and plug this one in. This simple process gets you back on the road without a costly trip to the dealership.
- ✔ Restored Performance & Efficiency: With updated software and correct parameters, you’ll restore the engine’s original power, throttle response, and fuel efficiency.
- ✔ Direct OEM Compatibility: A perfect replacement for part numbers 16250279, 09366810, and 09355699, guaranteeing proper fit and function.
- ✔ Peace of Mind Guarantee: This unit is backed by our one-year replacement warranty.
Expert Insight from the Shop Floor
“We see these late-90s GM workhorses all the time. A common headache is an intermittent issue that mechanics chase for weeks, replacing sensors and wiring. Often, the root cause is the original PCM’s aging software not being able to correctly interpret sensor data. By installing a module with the absolute latest GM calibrations—like this one—you’re not just replacing a part; you’re giving the vehicle’s brain the updated logic it needs to run properly. It solves those ‘ghost’ problems and provides a level of reliability the original part might not have had for years.”
Frequently Asked Questions
Do I need to have this programmed by a dealer?
No. We handle all the programming for you before we ship. After you place your order, you’ll provide us with your vehicle’s VIN, and we will flash the module with the correct, updated software for your specific 1998 Chevy Express 3500. It arrives ready to install.
Is this a difficult part to install?
For most DIYers with basic tools, this is a straightforward installation. The PCM is typically located in the engine compartment. The process involves disconnecting the battery, unplugging the electrical connectors from the old module, unbolting it, and then reversing the process with the new one. No special tools are required.
Will this fix my Check Engine Light?
If the Check Engine Light is caused by a faulty PCM or a software-related issue that this module corrects, then yes, it will resolve the problem. We always recommend having your vehicle scanned for diagnostic trouble codes (DTCs) to confirm the PCM is the point of failure before ordering.
What is a security relearn procedure?
On some GM vehicles of this era, a simple security relearn procedure is needed after installation to sync the new PCM with your vehicle’s anti-theft system. This process typically involves turning the key to the ‘ON’ position for 10-15 minutes and can be done without any special tools. We include simple instructions if this is required for your vehicle.
How do I provide my VIN?
After you complete your purchase, you will receive instructions on how to send us your vehicle’s 17-digit VIN. We cannot ship your part until we receive this information, as the programming is specific to your van.