1998-1999 Yukon PCM 09366810 | Programmed & Flashed to Your VIN

Restore Peak Performance to Your GM Truck or SUV

Is your 1998-1999 GMC Yukon or other GM vehicle running rough, shifting erratically, or refusing to start? As a mechanic with over two decades of experience under the hood, I’ve seen these symptoms countless times. Often, the culprit is a failing Powertrain Control Module (PCM), the central computer of your vehicle. A faulty PCM can cause a cascade of frustrating issues, from poor fuel economy to a persistent Check Engine Light. This isn’t just an annoyance; it’s a problem that affects your vehicle’s reliability and performance.

This replacement PCM is the definitive solution. We take the guesswork and high dealership costs out of the equation. Each module is meticulously programmed with the latest official GM software updates, tailored specifically to your vehicle’s Vehicle Identification Number (VIN). This ensures perfect communication between your engine and transmission, restoring the smooth operation and efficiency you expect. When you order, you’re not just getting a part; you’re getting a plug-and-play fix that gets you back on the road with confidence.

Is Your Truck Showing These PCM Failure Signs?

A failing computer can manifest in many ways. If you’re experiencing any of the following, a faulty PCM is a likely cause:

• ✔ Check Engine Light is on with codes like P0601 (Internal Control Module Memory Check Sum Error) or other communication faults.
• ✔ Harsh, erratic, or delayed transmission shifting.
• ✔ Engine cranks but refuses to start (no-start condition).
• ✔ Unexplained drop in fuel mileage (MPG).
• ✔ Rough or unstable engine idle.
• ✔ Stalling or hesitation during acceleration.
• ✔ Communication errors with diagnostic scan tools.

Straightforward DIY Installation Guide

Replacing the PCM on these GM trucks is one of the more accessible jobs for a DIYer. No advanced mechanical skills are needed. Follow these steps to get it done right.

1. Safety First: Always disconnect the negative terminal from your vehicle’s battery and secure it away from the post to prevent any accidental reconnection.
2. Locate the PCM: On most 1998-1999 Yukon, Tahoe, and Suburban models, the PCM is located in the engine compartment on the driver’s side, near the firewall or inner fender. It’s a silver metal box with several large multi-pin connectors.
3. Disconnect the Connectors: Carefully unclip and remove all electrical connectors from the old PCM. These connectors have release tabs that must be depressed. Do not force them.
4. Remove the Old Module: Unbolt the PCM from its mounting bracket. Keep the hardware, as you may need it to install the new unit.
5. Install the New PCM: Mount your new, pre-programmed PCM onto the bracket and securely re-fasten the bolts.
6. Reconnect Everything: Plug all electrical connectors firmly back into the new module until they click into place. Reconnect your negative battery terminal.
7. Perform Security Relearn (If Needed): In many cases, you will need to perform a simple security relearn procedure. Turn the key to the ‘ON’ position for 10-15 minutes, then turn it ‘OFF’ for 10 seconds. Repeat this cycle 3 times. On the final cycle, the vehicle should start.

Verified Fitment for Your GM Truck or Van

This module is a direct replacement for part numbers 16250279, 09366810, and 09355699. It is guaranteed to fit the following vehicles (please match your original part number):

Frequently Asked Questions