Restore Peak Performance to Your GM Truck or Car
Is your 1999-2000 Chevrolet Silverado, GMC Sierra, or other GM vehicle experiencing perplexing issues like stalling, a persistent check engine light, or erratic engine behavior? The Powertrain Control Module (PCM), the central computer of your vehicle, is often the source of these frustrating problems. This replacement PCM, part number 9354896, is the definitive solution to restore your vehicle’s reliability and drivability. It arrives at your door fully programmed with the latest GM software, specifically matched to your vehicle’s unique Vehicle Identification Number (VIN). This critical programming step ensures seamless integration and proper function of your engine, transmission, and emissions systems right out of the box.
From the Diagnostic Bay
We once had a 2000 Sierra 2500 in the shop that was driving the owner crazy. It had a random misfire that would come and go, and he had already replaced the spark plugs, wires, and even a fuel injector. His scan tool showed a code for an injector driver circuit fault. After checking the wiring and the injector itself, we traced the issue back to the source: a failing driver inside the original PCM. The computer itself was intermittently failing to send the signal to fire the injector. Installing a VIN-programmed PCM like this one solved the problem instantly. It’s a powerful reminder that when electronics are involved, the issue often lies with the controller, not just the components it manages.
Common Symptoms of a Failing PCM
- ✔ Check Engine Light: Your dashboard is illuminated with a check engine light, often with communication-related Diagnostic Trouble Codes (DTCs) or internal processor fault codes.
- ✔ No-Start Condition: The engine cranks but refuses to start, or starts and immediately stalls, indicating a potential loss of fuel or spark control from the PCM.
- ✔ Poor Engine Performance: You may experience rough idling, hesitation during acceleration, random stalling, or a noticeable decrease in power and fuel efficiency.
- ✔ Erratic Transmission Shifting: The PCM also controls transmission functions. A failing module can cause harsh shifting, delayed engagement, or getting stuck in a single gear.
- ✔ Communication Errors: A diagnostic scan tool may be unable to connect or communicate with the vehicle’s computer, pointing directly to a PCM failure.
- ✔ Intermittent Issues: Problems that appear and disappear with changes in temperature or driving time can often be traced to failing electronic components within the module.
Your Solution: A VIN-Programmed 1999-2000 Silverado PCM
Don’t settle for a generic, unprogrammed module that will cause more headaches than it solves. Our process is designed for precision and ease of installation. When you place your order, you provide us with your vehicle’s VIN. Our technicians then use that information to flash this module with the exact, factory-correct software and calibrations for your specific truck or car. This accounts for all factory options, from engine size and transmission type to emissions equipment, ensuring your vehicle operates exactly as its engineers intended. This is the most reliable and effective way to replace a faulty engine computer.
Installation and Setup
On most 1999-2002 GM trucks like the Silverado and Sierra, the PCM is located in the engine bay, on the driver’s side, typically under or near the battery tray. Physical installation is straightforward:
- Disconnect the Battery: Always disconnect the negative battery terminal before working on any vehicle electronics.
- Access the PCM: You may need to remove the battery to gain clear access to the module.
- Unplug and Unbolt: Carefully disconnect the wiring harness connectors and remove the bolts holding the old PCM in place.
- Install the New PCM: Mount the new module, reconnect the wiring harnesses securely, and reinstall the battery.
- Perform Security Relearn: After installation, you will need to perform a simple security relearn procedure (often called a VATS or Passlock relearn). This syncs the new PCM with your vehicle’s anti-theft system and keys. The procedure typically involves turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating two more times. This can be done in your driveway without any special tools.
This module is a direct replacement for part numbers 19109040, 09354896, and 9354896 and fits a wide range of GM vehicles, including the Chevrolet Corvette, Camaro, Tahoe, Suburban, and GMC Yukon models. Please verify the fitment list to ensure compatibility with your specific vehicle.
Frequently Asked Questions
What is VIN programming and why is it necessary?
VIN programming is the process of loading your vehicle’s specific software and calibration files onto the PCM. Every vehicle has unique settings based on its engine, transmission, and factory options. Programming the module with your VIN ensures it works perfectly with your vehicle’s systems, preventing performance issues, warning lights, and compatibility problems.
Do I need to do anything after I install this PCM?
Yes. After the physical installation, you must perform a security relearn procedure. This is a simple process that syncs the new computer to your vehicle’s anti-theft system. It typically takes about 30 minutes and can be done yourself without any special tools. Instructions are widely available online for your specific model.
Is this part truly plug-and-play?
Because it comes pre-programmed to your VIN, it is as close to plug-and-play as possible. The only additional step required from you is the security relearn procedure. No dealer visits or expensive programming tools are needed.
Will this fix my check engine light?
If the check engine light is caused by a faulty PCM (e.g., internal processor codes, driver circuit faults), then this replacement module will solve the problem. However, if the light is on due to other issues like a bad sensor or wiring problem, those issues will need to be addressed separately.
How do I provide my VIN after purchase?
After you complete your purchase, you will receive instructions on how to send us your 17-digit Vehicle Identification Number (VIN). We must have your VIN to program the module before we can ship it.