Get Your GM Truck Running Right Again

Is your 1998-1999 GMC Savana 1500, or another GM truck from that era, giving you headaches? If you’re dealing with a persistent check engine light, poor fuel economy, erratic shifting, or even a frustrating no-start condition, the problem often points directly to a failing Powertrain Control Module (PCM). As the brain of your vehicle, when the PCM goes, it can create a cascade of confusing issues that can be difficult to diagnose. This isn’t just a part; it’s the central command for your engine and transmission.

The Simple, Reliable Solution: A VIN-Programmed PCM

Forget expensive dealership visits and the hassle of finding a shop that can program a replacement module. We offer a straightforward solution. This is a reliable, tested, used OEM PCM that we program specifically for your vehicle using your VIN. This ensures it has the correct software and the latest updates from GM, making it a true plug-and-play fix.

• ✔ VIN-Programmed for Your Vehicle: We flash the module with your truck’s specific VIN, ensuring perfect compatibility and communication with other onboard systems.
• ✔ Latest GM Software: Your PCM will arrive with the most current factory software, which can resolve drivability issues the original programming may have had.
• ✔ Cost-Effective Repair: Get a fully functional, programmed computer for a fraction of the cost of a new unit and dealer programming fees.
• ✔ Broad Compatibility: This module, identified by service number 09355699, is a direct replacement for a wide range of GM trucks, vans, and SUVs from this period.

Expert Diagnosis: A Real-World Scenario

“A customer’s ’99 Tahoe came into my shop last week with a classic P0601 (Internal Control Module Memory Check Sum Error) code. It would crank all day but wouldn’t fire up. He had already replaced the fuel pump, thinking that was the issue. After confirming power and ground to the PCM, we knew the computer itself was the culprit. We installed one of our pre-programmed PCMs, and the truck started on the first turn of the key. It’s a textbook failure for these GMT400 platform vehicles, and having a ready-to-go module saved him hundreds in diagnostic time and parts.”

Easy Installation for Your 1998-1999 Savana 1500 PCM

You don’t need to be a master technician to install this part. With basic hand tools, you can get your vehicle back on the road quickly. The PCM is typically located in the engine compartment.

1. Safety First: Disconnect the negative terminal from your vehicle’s battery.
2. Locate the PCM: On most Savana and Express vans, it’s in the rear of the engine compartment on the driver’s side. On pickups and SUVs, it’s typically on the driver’s side fender well.
3. Disconnect Connectors: Carefully unclip the wiring harness connectors from the old PCM. There are usually two or three large multi-pin connectors.
4. Swap the Module: Unbolt the old PCM from its mounting bracket and set the new, programmed module in its place.
5. Reconnect Everything: Securely plug the wiring harnesses into the new PCM until they click. Reconnect the negative battery terminal.
6. Final Check: Turn the key to the ‘On’ position for 10 seconds before starting the engine. This allows the systems to initialize. Your vehicle is now ready to drive!

Guaranteed Fitment and Compatibility

To ensure a perfect match, please provide your vehicle’s 17-digit VIN during checkout. This allows us to perform the precise programming for your specific application. This module is a direct replacement for units with the following part numbers:

• ✔ 09355699
• ✔ 16266645
• ✔ 9355699
• ✔ 16250279
• ✔ 16258815
• ✔ 09366810
• ✔ 9366810

This PCM fits a massive range of popular GM models, including the Chevrolet Express, GMC Savana, Chevrolet/GMC Pickups (1500/2500/3500), Tahoe, Yukon, Suburban, Astro, Safari, S10, Blazer, and more. Please verify your part number or consult the detailed fitment list to confirm compatibility.