Is Your GM Truck or SUV Experiencing Frustrating Issues?
If your 1998-1999 GMC Yukon, Chevy Tahoe, Suburban, or other compatible GM vehicle is suffering from erratic behavior like stalling, harsh shifting, a no-start condition, or a persistent Check Engine Light, a failing Powertrain Control Module (PCM) is often the culprit. The PCM is the brain of your vehicle, managing everything from fuel injection and ignition timing to transmission shift points. When it fails, it can cause a cascade of problems that are difficult to diagnose and can leave you stranded. Don’t let a faulty computer dictate your vehicle’s reliability. This is your direct-fit, VIN-programmed solution to get your truck running right again.
From the Diagnostic Bay
We had a ’99 Suburban towed in that had its owner chasing his tail for weeks. The truck would crank but wouldn’t start intermittently. He had already replaced the fuel pump, filter, and crank sensor based on advice from forums. When we hooked up our scanner, we couldn’t even communicate with the engine computer. That’s a classic sign. After confirming the PCM had good power and ground, we knew the module itself was dead. We installed one of these VIN-programmed units, performed the quick security relearn, and the truck fired up on the first try. It’s a common failure on these GMT400 platform vehicles, and a pre-programmed module saves immense time and hassle.
Symptoms of a Failing 1998-1999 Yukon PCM
- ✔ Check Engine Light is on with communication error codes (e.g., U-codes).
- ✔ Engine cranks but refuses to start.
- ✔ Unexplained stalling or rough idling, especially when warm.
- ✔ Poor fuel economy and noticeable loss of power.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Seemingly random electrical issues or other warning lights on the dash.
- ✔ Failure to pass an emissions test due to module communication errors.
The Plug-and-Play Solution for Your Vehicle
This isn’t just a used part pulled from a yard; it’s a complete service. We take a genuine, tested OEM Powertrain Control Module and flash it with the latest official GM software calibration for your specific vehicle. By providing us with your Vehicle Identification Number (VIN) at checkout, you ensure that the module you receive is perfectly matched to your truck’s engine, transmission, and factory options. This eliminates the need for expensive trips to the dealership for programming, making the repair process faster and more affordable.
This unit is a direct replacement for multiple part numbers, including 16266645, 09355699, 9355699, 16250279, 16258815, 09366810, and 9366810. It fits a wide range of popular GM trucks, vans, and SUVs from the late 90s, restoring factory performance and reliability. Installation is straightforward for any DIY mechanic or professional technician. Simply disconnect the battery, unbolt the old module, plug in the new one, and reconnect the battery. In most cases, a simple security relearn procedure is all that’s needed to get you back on the road.
Frequently Asked Questions
What is a PCM and what does it do?
The Powertrain Control Module (PCM), also known as the Engine Control Module (ECM), is your vehicle’s main computer. It controls the critical functions of the engine and transmission to ensure optimal performance, fuel efficiency, and emissions control.
Why do you need my VIN?
Your Vehicle Identification Number (VIN) allows us to load the exact, correct GM software for your vehicle’s specific configuration (engine, transmission, tire size, gear ratio, etc.). This ensures the module works perfectly right out of the box without requiring a trip to a dealer for programming.
Is this part difficult to install?
Installation is generally simple. It involves disconnecting the vehicle’s battery, unplugging the electrical connectors from the old PCM, removing a few bolts, and then installing the new one in its place. After installation, you may need to perform a security relearn procedure, which can typically be done without special tools and takes about 30 minutes.
Will this computer fix my transmission shifting problems?
In many cases, yes. The PCM controls the transmission’s electronic solenoids to manage shifting. If your shifting issues are caused by a faulty computer, this part will resolve them. However, it will not fix mechanical issues within the transmission itself.
Is this a new part?
This is a quality, tested, used OEM part sourced from a salvaged vehicle. We inspect each unit and program it with the latest software to ensure it functions correctly and provides a reliable, cost-effective solution.