Restore Peak Performance to Your GM Truck or SUV
Is your 1998-1999 GMC Yukon, Chevy Tahoe, Suburban, or pickup truck suffering from frustrating and hard-to-diagnose issues? If you’re dealing with a persistent check engine light, erratic transmission shifting, poor fuel economy, or a no-start condition, the root cause is often a failing Powertrain Control Module (PCM). As the central computer of your vehicle, the PCM is responsible for managing everything from fuel delivery and spark timing to transmission operation. When it fails, it can create a cascade of problems that can be mistaken for major mechanical failures.
This replacement Powertrain Control Module, part number 09366810, is the definitive solution to get your vehicle running reliably again. It’s not just a replacement part; it’s a fully integrated solution. We program the module specifically to your vehicle’s unique Vehicle Identification Number (VIN) before it ships. This critical step ensures 100% compatibility with your vehicle’s specific options and systems, and it loads the latest, most stable software updates from General Motors. This process eliminates the need for an expensive trip to the dealership for programming, saving you time and money.
From the Diagnostic Bay
We had a customer with a ’99 Suburban who was at his wit’s end. He was experiencing severe transmission slipping and harsh 1-2 shifts. He had already spent a small fortune having the transmission serviced and shift solenoids replaced, with no improvement. The vehicle’s computer wasn’t showing any transmission-specific fault codes, just a generic communication error. After diagnosing the system, we found the PCM was failing intermittently and sending incorrect signals to the transmission. We installed a VIN-programmed PCM, performed the quick security relearn, and the truck drove like it just rolled off the factory floor. The transmission was fine all along; the brain telling it what to do was the problem.
Is a Failing PCM the Cause of Your Problems?
A faulty PCM can manifest in numerous ways. If you’re experiencing any of the following symptoms, a failing computer is a likely culprit. Replacing your old module with our correctly programmed 1998-1999 Yukon PCM can be the solution.
- ✔ Persistent Check Engine Light (CEL) that won’t clear.
- ✔ Unexplained engine misfires, stumbling, or stalling.
- ✔ Harsh, delayed, or erratic automatic transmission shifting.
- ✔ The transmission seems to be stuck in one gear (limp mode).
- ✔ A sudden and significant drop in fuel mileage.
- ✔ The engine cranks but refuses to start.
- ✔ Failure to pass an emissions test due to communication errors.
The VIN Programming Advantage
Ordering a 1998-1999 Yukon PCM from us is a simple, streamlined process designed for the DIY mechanic or professional shop. After you place your order, simply provide us with your vehicle’s 17-digit VIN. Our technicians will use this information to flash the module with the precise GM-certified calibration for your truck’s engine, transmission, and emissions equipment. This ensures a seamless installation and immediate restoration of function. This module is a direct replacement for multiple part numbers, including 16250279, 09366810, and 09355699, and fits a wide range of GM vehicles from that era.
Frequently Asked Questions
Why is my VIN required for this part?
Your VIN allows us to program the PCM with the exact software and calibrations your specific vehicle needs. This includes information about the engine size (5.0L, 5.7L, etc.), transmission type, gear ratios, and emissions equipment. Without this, the module will not function correctly.
Is this part truly plug-and-play?
Because we pre-program the module, it is nearly plug-and-play. However, on these GM vehicles, you will need to perform a simple security relearn procedure (also known as Passlock relearn) after installation. This procedure syncs the new PCM with your vehicle’s anti-theft system and can typically be done in your driveway in about 30 minutes without special tools. Instructions are readily available online.
What is a Crankshaft Variation or CASE Relearn?
A CASE (Crankshaft Angle Sensor Error) relearn calibrates the PCM to the specific signal from your engine’s crankshaft position sensor. While the vehicle will often run without it, performing this procedure with a capable scan tool is recommended to prevent a P1336 trouble code and ensure optimal engine timing and misfire detection. Many local shops can perform this service for a minimal fee.
Will this fix my transmission shifting issues?
In many cases, yes. The PCM directly controls the transmission’s shift solenoids and line pressure. If your transmission problems are electronic in nature (caused by a faulty computer), this module is the correct fix. It cannot fix internal mechanical failures like worn clutches or a bad valve body.
How do I confirm this is the right part for my vehicle?
The best way is to match the service number on your existing module to one of the compatible numbers listed: 16250279, 09366810, or 09355699. Our extensive fitment list also covers the compatible models, but matching the part number is the most accurate method.