Is Your 1998-1999 GMC Yukon Running Rough?
If you’re dealing with frustrating issues like a persistent check engine light, erratic engine behavior, poor fuel economy, or even a no-start condition, the culprit is often the heart of your vehicle’s electronics: the Powertrain Control Module (PCM). This vital component acts as the central computer for your engine and transmission, managing everything from fuel injection and ignition timing to shift points and emissions. When it fails, it can cause a cascade of problems that are often misdiagnosed, leading to costly and unnecessary repairs.
Your Direct-Fit 1998-1999 Yukon PCM Solution
This isn’t just a replacement part; it’s a complete, plug-and-play solution. We take a genuine, road-tested OEM PCM and program it specifically to your vehicle’s Vehicle Identification Number (VIN). This critical step ensures that the computer has the correct software and calibrations for your Yukon’s specific engine, transmission, and options. We load the latest GM-certified updates, which can often resolve factory-known issues and improve overall performance and drivability. By matching the programming to your VIN, we eliminate the need for an expensive trip to the dealership for coding.
Common Symptoms of a Failing PCM
- ✔ Check Engine Light is illuminated with various, often inconsistent, trouble codes.
- ✔ Engine misfires, stumbles, or hesitates during acceleration.
- ✔ Rough or erratic idling.
- ✔ The vehicle fails to start, or starts and then immediately stalls.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Automatic transmission shifts harshly, at the wrong times, or not at all.
- ✔ Communication errors with diagnostic scan tools.
- ✔ Intermittent issues that seem to have no logical cause.
Why Choose a VIN-Programmed Module?
Getting the right part is only half the battle. A PCM for a modern vehicle must be programmed to function. This unit arrives at your door ready for installation. Simply disconnect the battery, swap the modules, and reconnect the battery. In most cases, you will need to perform a simple security relearn procedure (often called a Passlock relearn) which can be done without any special tools. This process syncs the new module with your vehicle’s anti-theft system. This pre-programming saves you hundreds of dollars in dealership fees and gets your truck back on the road faster.
This module is a direct replacement for part numbers 16266645, 09355699, and others listed in the fitment guide. It is compatible with a wide range of GM trucks, vans, and SUVs from 1998-1999. Please verify your part number and review the comprehensive fitment list to ensure compatibility. The most important step is providing us with your VIN upon purchase so we can ensure a perfect software match for your 1998-1999 Yukon PCM.
Frequently Asked Questions
What is a PCM and what does it do?
The Powertrain Control Module (PCM) is your vehicle’s main computer. It controls all aspects of engine and transmission operation to ensure optimal performance, fuel economy, and emissions.
Is this part difficult to install?
Installation is straightforward for someone with basic mechanical skills. It typically involves disconnecting the vehicle’s battery, unplugging the electrical connectors from the old PCM, unbolting it, and then installing the new one in reverse order. The key is to handle the connectors with care.
Will I need to do anything after installation?
Yes, after installing the programmed PCM, you will likely need to perform a security relearn procedure. This procedure syncs the new computer to your vehicle’s anti-theft system and usually takes about 30 minutes to complete using just the ignition key. Instructions are widely available online for your specific model.
How do I provide my VIN number?
After you complete your purchase, you can send us a message with your 17-digit VIN. We cannot ship your order until we receive this information, as the programming is specific to your vehicle.
Is this a new part?
This is a high-quality, used OEM part sourced from a salvaged vehicle. Each unit is inspected and tested to ensure it is fully functional before being programmed with the latest GM software for your vehicle.