1998-1999 Suburban PCM 9366810 | Programmed with Your VIN

Is Your Suburban Running Rough? Get a Reliable, Programmed Solution.

If your 1998 or 1999 Suburban 1500 is giving you headaches with stalling, erratic shifting, or a persistent Check Engine light, the Powertrain Control Module (PCM) is often the culprit. After two decades on the road, these original computers can fail, causing a host of frustrating and hard-to-diagnose problems. This isn’t just a replacement part; it’s a fully programmed, vehicle-specific solution designed to get your truck running right again, without a costly trip to the dealership.

Common Symptoms of a Failing GM PCM:

Over my 20+ years as a technician, I’ve seen these exact modules cause issues that can send you down a rabbit hole of expensive, unnecessary repairs. Before you replace another sensor, see if your vehicle is exhibiting any of these classic PCM failure signs:

• ✔ Unexplained Check Engine Light with various communication or sensor codes.
• ✔ Rough or unstable idle.
• ✔ Poor fuel economy.
• ✔ Harsh or delayed transmission shifting.
• ✔ Engine stalling or refusing to start, especially when warm.
• ✔ No communication with your OBD2 scan tool.

The Critical Advantage: VIN-Specific Programming

You can’t just pull a computer from another truck and expect it to work. Your vehicle’s VIN is a unique identifier that tells the PCM everything it needs to know—from the engine and transmission type to the axle ratio and factory options. We take your VIN and flash this used OEM computer with the latest official software from GM. This ensures all parameters are perfectly matched to your 1998-1999 Suburban PCM, restoring its original performance and efficiency.

Expert Pro Tip: Before you install a replacement PCM, take 10 minutes to check your main ground connections. On these GM trucks, a corroded or loose ground strap from the engine block to the frame or from the battery to the chassis can cause voltage issues that mimic PCM failure. A bad ground can also damage the new module. A quick wire brush cleaning on these contact points is cheap insurance for your repair.

Plug-and-Play Installation: No Dealer Visit Required

Installing this module is a straightforward job you can do in your own driveway. Here’s a general guide:

1. Safety First: Disconnect the negative terminal from your vehicle’s battery.
2. Locate the PCM: On most Suburbans and pickups of this era, the PCM is located in the engine compartment on the driver’s side, near the fender or firewall.
3. Disconnect the Connectors: Carefully unplug the electrical harness connectors from the old module. There are typically release tabs you’ll need to press or lift.
4. Remove the Old Module: Unbolt the PCM from its mounting bracket.
5. Install the New Module: Bolt your new, pre-programmed PCM into place.
6. Reconnect Everything: Firmly plug the harness connectors into the new module until they click. Reconnect your battery terminal.
7. Final Step: Your vehicle may need to complete a security relearn procedure, which is a simple process you can typically do with just the ignition key. Instructions are widely available or can be provided upon request.

Guaranteed Compatibility

This computer is a direct replacement for several part numbers. To ensure a perfect match, please verify that the number on your current module is one of the following: 09355699, 16266645, 9355699, 16250279, 16258815, or 9366810. While this listing is for the Suburban, this module (identified by service ID 9355699) is also the correct computer for a wide range of GM trucks and vans from 1998-1999, including the Tahoe, Yukon, C/K Pickups, Express, Savana, and more. Order with confidence and get your trusted GM vehicle back in top form.