Restore Your Truck’s Reliability & Performance
Is your Chevrolet Express, GMC Savana, or GM truck plagued by frustrating issues like a persistent check engine light, rough idling, stalling, or poor fuel economy? These are classic signs of a failing Powertrain Control Module (PCM), the electronic brain of your vehicle. Don’t let a faulty computer keep your workhorse off the road. This professionally programmed engine computer is the definitive, hassle-free solution to get your truck running like it should again.
Common Symptoms & Your Solution
A failing PCM can cause a wide range of problems that are often misdiagnosed, leading to wasted time and money on unnecessary parts. If you’re experiencing any of the following, this module is your answer:
- Unexplained Check Engine Light with codes for misfires (P0300), lean conditions (P0171, P0174), or internal module failure.
- Engine stalling or cutting out intermittently.
- Rough or erratic idling.
- Noticeable decrease in fuel efficiency.
- Failure to pass an emissions or smog test.
- Harsh or incorrect shifting from the transmission.
This replacement module is the direct fix for these issues. We remove the guesswork by pre-programming it specifically for your vehicle. Simply provide your VIN after purchase, and our technicians will flash the unit with the latest, most stable GM software updates for your exact 1998 Chevy Express 1500 PCM 09355699, ensuring a seamless installation.
Features & Tangible Benefits
- โ Arrives Ready for Installation: No expensive trips to the dealership for programming. We flash the latest GM software using your VIN, ensuring perfect compatibility and a true plug-and-drive experience.
- โ Restored Drivability & Performance: A correctly functioning computer is critical for engine performance. This module will help eliminate common issues like rough idle, stalling, and poor fuel economy caused by a faulty original unit.
- โ OEM Form & Function: Engineered to meet original GM specifications for a dependable, long-lasting repair that you can count on for work, hauling, or daily driving.
- โ Guaranteed Fitment: This module is a direct replacement for part numbers 09355699, 16250279, and 09366810, covering a wide range of popular GM trucks, vans, and SUVs from the late 90s.
- โ Peace of Mind Included: This unit is backed by our one-year replacement warranty, so you can install it with complete confidence in your repair.
Expert Insight: The Heart of Your Vortec Engine
The PCM in these late-90s GM trucks is the command center for the legendary Vortec engine. It doesn’t just manage fuel and spark; it controls transmission shifting, emissions equipment, and communicates with every other module in the vehicle. When it fails, the entire system suffers. Unlike generic, unprogrammed modules, our VIN-specific programming ensures all parametersโfrom fuel trims to transmission shift pointsโare set exactly as the factory intended. This is the key to a successful, lasting repair that restores the reliable performance your truck was built for.
Frequently Asked Questions
Do I need to program this module?
No. This is the biggest benefit of our service. The module you receive will be pre-programmed to the Vehicle Identification Number (VIN) you provide. It arrives ready for installation without the need for a trip to the dealer or a specialized scan tool.
Where is the PCM located on my 1998 GM truck or van?
On most models covered by this part, such as the Express/Savana vans and C/K pickups (Silverado/Sierra), the PCM is located in the engine compartment on the driver’s side, often near the battery or air filter housing. It is a silver metal box with multiple large electrical connectors.
Will this fix my check engine light?
If the check engine light is on due to an internal failure of your original PCM, then yes, this part is designed to correct that. However, it’s always recommended to have the codes read to ensure the problem isn’t with a different sensor or component on the vehicle.
What information do you need from me?
After you complete your purchase, you will need to send us the 17-digit VIN of your vehicle. This is essential for us to program the module correctly. You can typically find your VIN on your vehicle’s dashboard (visible through the windshield), on the driver’s side door jamb sticker, or on your vehicle’s registration and insurance documents.
What is a CASE Relearn and will I need to perform one?
A CASE (Crankshaft Angle Sensor Error) Relearn is a procedure that synchronizes the new PCM with the engine’s crankshaft position sensor. While our programming gets the module 99% of the way there, some vehicles may still require this procedure to turn off the check engine light (specifically for code P1336). Most professional-grade scan tools can perform this procedure in a few minutes.