Restore Peak Performance to Your GM Truck
Is your 1999-2000 Silverado 2500 running rough, stalling, or showing a persistent Check Engine Light? These are classic signs of a failing Powertrain Control Module (PCM), the central computer of your vehicle. Don’t let a faulty module keep your reliable truck off the road. This direct-fit PCM, part number 09354896, is the definitive solution to restore your engine’s performance, fuel efficiency, and smooth operation. We take the guesswork out of the repair by programming the module specifically for your truck using your Vehicle Identification Number (VIN) and the latest GM-certified software updates before it even ships.
From the Diagnostic Bay
We had a 2000 Sierra 2500 come in that was a real head-scratcher. The owner had replaced the throttle position sensor, the mass airflow sensor, and even the fuel pump based on various codes and advice. The truck would still randomly stall at idle and had a terrible hesitation under load. After confirming all the new parts were working, we hooked up our diagnostic scope to the PCM outputs. We found intermittent, erratic signals being sent to the fuel injectors. The PCM itself was failing internally, causing all the ghost codes and frustrating symptoms. We installed a VIN-programmed module just like this one, performed a quick security relearn, and the truck ran like it just rolled off the assembly line. It’s a powerful reminder that sometimes the issue lies with the brain, not the limbs.
Common Symptoms of a Failing PCM
If you’re experiencing any of the following issues, a failing PCM could be the culprit. Replacing it with a properly programmed unit is often the most effective and lasting repair.
- ✔ Unexplained Check Engine Light (with codes for various sensors)
- ✔ Engine stalling, stumbling, or hesitating
- ✔ Poor fuel economy
- ✔ Harsh or erratic automatic transmission shifting
- ✔ Difficulty starting the engine or a no-start condition
- ✔ Misfire codes that don’t resolve with new plugs or coils
- ✔ Failure to pass an emissions test
Why Choose Our Programmed 1999-2000 Silverado PCM?
This isn’t just a replacement part; it’s a comprehensive solution. Unlike a generic module from a parts store or a salvage yard unit, our PCM arrives ready for installation. We use your truck’s VIN to load the exact factory software and all subsequent updates from General Motors. This process ensures perfect communication between the engine, transmission, and all other vehicle systems. This is the same procedure a dealership performs, but without the high cost and inconvenience of having your truck towed and serviced. This specific module, 09354896, also directly replaces part numbers 19109040 and 9354896, guaranteeing compatibility.
Simple Installation Process
For most 1999-2000 Silverado and Sierra 2500 models, the PCM is located in the engine bay, on the driver’s side, underneath the battery tray. The process is straightforward for a DIY mechanic:
- Disconnect the Battery: Always disconnect the negative battery terminal first for safety.
- Access the Module: You will likely need to remove the battery to access the PCM and its mounting bracket.
- Swap the Modules: Carefully disconnect the wiring harnesses from the old module and remove it. Install the new module and securely reconnect the harnesses.
- Reassemble: Reinstall the battery and connect the terminals.
- Perform Security Relearn: Your truck’s anti-theft system (PassLock/VATS) will need to be synchronized with the new PCM. This is a simple procedure that typically involves turning the key to the ‘ON’ position for 10-15 minutes, then ‘OFF’, and repeating two more times. Your vehicle’s service manual will have the exact steps.
In some cases, a Crankshaft Variation (CASE) relearn may be required using a capable scan tool to clear a P1336 code and ensure the most accurate misfire detection. However, the truck will run and drive without it.
Frequently Asked Questions
Do I need to send my old PCM to you?
No, there is no core charge or need to send in your old module. This is a direct purchase, allowing you to get your truck back on the road faster.
Is this a plug-and-play part?
Yes, for the most part. Because we program it with your vehicle’s VIN, it is ready to be installed. You will only need to perform the vehicle’s security relearn procedure, which does not require any special tools.
What information do you need from me after I order?
After you complete your purchase, you will need to provide us with your 17-digit Vehicle Identification Number (VIN). This is critical for us to load the correct software for your truck’s specific engine, transmission, and options.
Will this fix my transmission shifting problems?
If the shifting problems are caused by faulty electronic signals from a failing PCM, then yes, this will resolve them. The PCM controls both engine and transmission functions, and a new module often corrects electronically-induced shifting issues.
Where is the PCM located on my 1999-2000 Silverado 2500?
The Powertrain Control Module is located in the engine compartment on the driver’s side, mounted to the inner fender below the battery and battery tray.
Does this fit other vehicles besides the Silverado 2500?
Yes, this PCM fits a wide range of GM vehicles from that era, including the Corvette, Camaro, Firebird, Sierra, Tahoe, and Suburban. Please verify the part number 09354896 matches your original unit or consult the fitment list to confirm compatibility.