Restore Peak Performance to Your GM Truck or SUV
Is your 1998-1999 Suburban 2500, Tahoe, or GMC Sierra suffering from frustrating and unpredictable issues? A faulty Powertrain Control Module (PCM), the central computer of your vehicle, is often the hidden culprit behind a wide range of performance problems. This direct-fit replacement PCM, part number 09366810, is the definitive solution to get your truck running reliably again. It arrives at your door fully programmed to your vehicle’s specific Vehicle Identification Number (VIN), loaded with the latest factory software updates from GM. This ensures seamless integration and optimal performance right out of the box, eliminating the need for expensive dealership programming.
From the Diagnostic Bay
We had a ’99 Yukon in the shop that was driving the owner crazy. It had an intermittent hard shift from 1st to 2nd and a check engine light that would come and go. The owner had already replaced the transmission fluid, filter, and a shift solenoid with no luck. After hooking up our scanner, we noticed erratic data coming from the PCM. Instead of chasing more phantom sensor issues, we installed a VIN-programmed PCM like this one. After a quick security relearn, the truck shifted perfectly, the check engine light stayed off, and the owner was thrilled to have his reliable Yukon back. It’s a classic case of treating the cause, not just the symptoms.
Common Symptoms of a Failing PCM
A failing PCM can manifest in numerous ways, often mimicking other component failures. If you’re experiencing any of the following, your engine computer may be at the end of its life:
- ✔ Persistent Check Engine Light (CEL) with various trouble codes.
- ✔ Rough or erratic engine idling.
- ✔ Poor fuel economy that has noticeably decreased over time.
- ✔ Harsh, delayed, or unpredictable automatic transmission shifting.
- ✔ Engine stalling, stumbling, or hesitating during acceleration.
- ✔ A complete no-start condition where the engine cranks but won’t fire up.
- ✔ Communication errors with diagnostic scan tools.
The Simple, Reliable Solution: VIN Programming
Don’t settle for a generic, one-size-fits-all module from a salvage yard that will cause more headaches. Our process is designed for the DIY mechanic and professional alike. When you purchase this module, you simply provide us with your vehicle’s 17-digit VIN. Our technicians then use this information to load the precise software calibration your vehicle requires. This includes all factory updates that address common drivability issues and improve efficiency, ensuring your 1998-1999 Suburban 2500 PCM operates exactly as the manufacturer intended.
Installation and Setup for Your 1998-1999 Suburban 2500 PCM
Replacing the PCM is a straightforward process. It is typically located in the engine bay on the driver’s side. After disconnecting the battery, you can unbolt the old module, disconnect the wiring harnesses, and install the new one in its place. While this module is programmed to be plug-and-play, some GM vehicles of this era require a simple security relearn procedure to sync the new PCM with your vehicle’s anti-theft system. This procedure, often called a “CASE Relearn” or “Passlock Relearn,” can usually be performed without special tools and instructions are widely available. This final step ensures full communication between the module and your vehicle’s other systems.
This module is a direct replacement for multiple part numbers, including 16250279, 09366810, and 09355699, and fits a wide array of GM trucks, vans, and SUVs from the late 90s. By providing your VIN, you guarantee you receive a perfectly matched and updated computer for your specific application, taking all the guesswork out of the repair.
Frequently Asked Questions
What information do I need to provide after purchase?
After you place your order, you will need to send us your vehicle’s 17-digit Vehicle Identification Number (VIN). This is essential for us to program the module correctly for your specific vehicle’s options and software requirements.
Is this part truly “plug and play”?
For most vehicles, yes. It comes programmed to your VIN. However, on many GM vehicles, you may need to perform a simple security relearn procedure (also known as Passlock or anti-theft relearn) to sync the new PCM with your keys. This procedure typically takes 10-30 minutes and does not require a special scan tool.
Will this fix my transmission shifting problems?
The PCM controls both the engine and the transmission. If your shifting issues are caused by faulty electronic commands from a failing module, then yes, this part is very likely to be the solution. Proper diagnosis is always recommended to rule out mechanical transmission faults.
Do I need to return my old PCM?
No core charge is required for this module. You can keep your old part or recycle it locally.
What does being programmed with the ‘newest updates’ mean?
Over the life of a vehicle, manufacturers like GM release software updates to fix bugs, improve transmission shift points, increase fuel efficiency, and solve other drivability concerns. We ensure your replacement module is flashed with the very latest and most stable software version available for your VIN.