Is Your 1998-1999 GMC Yukon Acting Up?
If you’re dealing with frustrating issues like a persistent check engine light, erratic engine behavior, harsh shifting, or even a no-start condition, a failing Powertrain Control Module (PCM) is often the culprit. In my 20+ years of hands-on diagnostics, I’ve seen countless GMT400-platform trucks and SUVs sidelined by a faulty computer. The good news is, you’ve found the straightforward, reliable solution.
This is a genuine, used OEM PCM that has been meticulously tested and is ready for a new life in your vehicle. We take the guesswork and dealer expense out of the equation by programming the module specifically for your truck using your Vehicle Identification Number (VIN). This ensures all factory settings and the latest GM software updates are loaded, making the installation process as simple as possible.
From the Shop Floor: “A customer’s ’99 Yukon came in last week with these exact symptoms: it would crank but not start, and the scan tool couldn’t communicate with the PCM at all. After checking the main power and ground circuits to the moduleโwhich were solidโwe knew the computer itself had failed internally. We installed one of these VIN-programmed units, and the truck fired right up on the first try. Itโs a common failure Iโve diagnosed hundreds of times on these vehicles, and this is the most reliable fix.”
Why Choose Our 1998-1999 Yukon PCM?
- โ VIN-Programmed for Your Truck: We flash the module with your vehicle’s specific VIN and the latest GM software. This is not a generic, one-size-fits-all part.
- โ Plug-and-Play Solution: Because the programming is done before we ship, you can avoid a costly trip to the dealership. In most cases, no further programming is required.
- โ Solves Common Problems: An effective fix for issues like false sensor codes (especially for O2 sensors or crank/cam sensors), poor fuel economy, transmission shifting problems, and no-communication errors.
- โ Cost-Effective Repair: Get the reliability of an OEM part without the high cost of a brand-new module. This used unit provides exceptional value.
Simple, Straightforward Installation
You don’t need to be a master mechanic to replace your PCM. Follow these basic steps to get your Yukon back in top shape.
- Safety First: Disconnect the negative terminal from your vehicle’s battery.
- Locate the PCM: On your 1998-1999 Yukon, the PCM is located in the engine compartment on the driver’s side, typically near the fender or firewall.
- Disconnect Connectors: Carefully unclip and remove the wiring harness connectors from the old module. Inspect the pins for any corrosion or damage before proceeding.
- Swap the Modules: Unbolt and remove the old PCM. Mount the new, programmed module in its place.
- Reconnect Everything: Securely plug the wiring harnesses into the new PCM. You should hear a distinct click. Reconnect the negative battery terminal.
- Start Your Engine: The vehicle is now ready to start. The security system may require a simple relearn procedure (turn key to ‘ON’ for 10-15 minutes), which is a normal part of the process.
Guaranteed Compatibility
This module, identified by part number 9366810, is a direct replacement for several other service numbers, including 09355699, 16266645, 16250279, and 16258815. It is compatible with a wide range of 1998-1999 GM trucks and vans, such as the Chevrolet Tahoe, Suburban, C/K Pickups, Express Van, and their GMC counterparts. Providing your VIN is the final step to guarantee a perfect match.
IMPORTANT: After completing your purchase, please send us your 17-digit VIN. We cannot ship your order until we have this information to program the module correctly.