Restore Peak Performance to Your C5 Corvette or GM Vehicle
Is your 1999-2000 Corvette, Camaro, or GM truck suffering from baffling electrical issues, poor engine performance, or a persistent Check Engine Light? The Powertrain Control Module (PCM), the vehicle’s central computer, is often the culprit. It governs everything from fuel injection and ignition timing to transmission shifting and emissions control. When it fails, it can cause a cascade of problems that are difficult to diagnose. This direct-replacement PCM, part number 09354896, is the definitive solution to restore your vehicle’s factory performance and reliability.
From the Diagnostic Bay
We once had a 2000 Corvette roll into the shop with a list of complaints as long as your arm. The owner reported random stalling, harsh 1-2 shifts, and a check engine light that threw codes for the O2 sensors, MAF sensor, and even a transmission solenoid. He had already replaced two of the sensors with no improvement. After hooking up our professional scan tool, we noticed erratic data streams coming from the PCM. Instead of chasing ghosts and replacing more good parts, we identified the core issue: a failing internal processor in the original module. We installed one of our VIN-programmed PCMs, performed the quick security relearn, and the car immediately ran like it just left the showroom. All the false codes vanished, the shifting smoothed out, and the engine idled perfectly. It’s a classic case of the ‘brain’ causing symptoms all over the ‘body’.
Common Symptoms of a Failing PCM
A faulty PCM can manifest in numerous ways. If you’re experiencing any of the following, it’s a strong indicator that your vehicle’s main computer needs attention:
- ✔ Unexplained Check Engine Light (CEL) illumination
- ✔ Engine stalling, stumbling, or rough idling
- ✔ Decreased fuel economy
- ✔ Harsh or erratic automatic transmission shifting
- ✔ Failure to pass emissions testing
- ✔ Intermittent no-start or hard-starting conditions
- ✔ Communication errors with diagnostic scan tools
- ✔ Multiple, unrelated diagnostic trouble codes (DTCs) being stored
The Plug-and-Play 1999-2000 Corvette PCM Solution
Don’t let a faulty computer keep your car off the road. Our process is designed to be simple, effective, and get you back to driving with confidence. Unlike a generic module from a parts store, this unit is specifically prepared for your vehicle. We flash it with the latest, most stable GM-certified software updates using the unique Vehicle Identification Number (VIN) you provide. This critical step ensures complete compatibility with your car’s specific options and systems, eliminating the need for an expensive trip to the dealership for programming. This is a true plug-and-play repair.
Simple Installation Process
Replacing the PCM is a straightforward job for a DIY mechanic. On the 1999-2000 Corvette, the module is located in the engine compartment on the passenger side, near the firewall. On trucks like the Silverado and Sierra, it’s typically found under the battery tray on the driver’s side. The process generally involves:
- Disconnect the Battery: Always disconnect the negative battery terminal before working on any electronic components.
- Access the PCM: Remove any covers or components blocking access to the module.
- Disconnect Connectors: Carefully unplug the wiring harness connectors from the old PCM.
- Swap the Modules: Unbolt the old unit and install the new one in its place.
- Reconnect Everything: Plug the harness connectors into the new PCM and reconnect the battery.
- Perform Security Relearn: You may need to perform a simple security relearn procedure (often called VATS relearn), which typically involves turning the key to the ‘ON’ position for 10-15 minutes. Instructions are readily available online for your specific model.
This module is a guaranteed fit for a wide range of GM vehicles. Please verify your part number (09354896, 19109040, or 9354896) and check the compatibility list below to ensure proper fitment for your car or truck.
Frequently Asked Questions
Do I need to have this module programmed by a dealer?
No. We handle the programming for you before we ship the part. Simply provide us with your vehicle’s VIN during or after checkout, and we will flash the module with the latest GM software specific to your car.
What is a VIN and where do I find it?
The VIN is your vehicle’s unique 17-digit identification number. You can find it on your vehicle’s registration, insurance card, or on a small plate on the driver’s side of the dashboard, visible through the windshield.
What is the security relearn procedure?
This is a simple procedure that syncs the new PCM with your vehicle’s anti-theft system (VATS). It usually involves a sequence of key turns and waiting periods. It does not require any special tools and is a necessary step for the vehicle to start after installation.
Is this part compatible with other vehicles besides the Corvette?
Yes. This PCM, part number 09354896, is the correct electronic control module for many GM vehicles from that era, including the Camaro, Firebird, Silverado, Sierra, Tahoe, and Suburban. Please check the detailed fitment list on this page to confirm for your specific model and year.
Will this fix my check engine light?
If the check engine light and other symptoms are being caused by a faulty PCM, then yes, this part will resolve those issues. It is the core component that reads sensors and makes decisions for the powertrain.