Is Your Truck’s Brain on the Fritz? Restore Peak Performance Today!
If you’re dealing with frustrating and unpredictable issues like stalling, poor fuel economy, a persistent check engine light, or erratic shifting in your 1999-2000 GM truck, the problem often lies with a failing Powertrain Control Module (PCM). As the central computer of your vehicle, the PCM is responsible for managing everything from fuel injection and spark timing to transmission shift points. When it starts to fail, it can create a cascade of problems that are difficult to diagnose and expensive to fix through trial and error.
This is your direct-fit, reliable solution. We offer a Powertrain Control Module, part number 9354896, that is professionally programmed to your vehicle’s specific Vehicle Identification Number (VIN). This critical programming step ensures that the module communicates perfectly with all other systems in your truck, just as the original did. We load the latest GM-certified software updates, which can resolve underlying drivability issues that may have existed from the factory. Forget costly dealership visits and the uncertainty of using a generic, unprogrammed module. This is the definitive fix to get your truck back on the road, running smoothly and efficiently.
From the Diagnostic Bay
I once had a 2000 Sierra 1500 in the shop that was driving the owner crazy. It had a random P0300 misfire code that would appear intermittently. He had already replaced the spark plugs, wires, ignition coils, and even the crankshaft position sensor, but the light always came back. After hours of diagnostics, we hooked up a scope to the ignition control signal from the PCM. We found that the signal for cylinder 4 would drop out randomly under load. The culprit wasn’t a mechanical part at all; it was a failing driver circuit inside the original PCM. We installed a VIN-programmed module just like this one, performed the CASE relearn, and the truck ran perfectly. It’s a classic example of how a faulty computer can mimic a dozen other problems.
Symptoms of a Failing GM Powertrain Control Module
- โ Unexplained Check Engine Light (CEL) that remains on despite other repairs.
- โ Rough, unstable, or surging engine idle.
- โ Vehicle stalls unexpectedly, either at idle or while driving.
- โ Noticeable decrease in fuel mileage (MPG).
- โ Hesitation or stumbling during acceleration.
- โ Harsh, delayed, or incorrect automatic transmission shifting.
- โ Complete no-start condition where the engine cranks but will not fire.
- โ Communication errors with diagnostic scan tools.
The Importance of a VIN-Programmed 1999-2000 Silverado PCM
In modern vehicles, the PCM is not a one-size-fits-all component. It’s programmed with specific data for your truck’s engine size, transmission type, gear ratios, tire size, and emissions equipment. Using a generic module from a salvage yard without proper programming will almost certainly result in poor performance, incorrect shifting, and persistent warning lights. Our process eliminates this guesswork. By providing us with your VIN during checkout, you receive a module that is a true plug-and-play component for your specific vehicle. This ensures all systems operate exactly as GM engineers intended, restoring lost power, and efficiency.
Installation and Setup
For most compatible 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. Installation is straightforward:
- Disconnect the Battery: Always disconnect the negative battery terminal before working on any electronic components.
- Access the PCM: You may need to remove the battery to gain clear access to the module.
- Disconnect Connectors: Carefully unplug the wiring harness connectors from the old PCM. Note their orientation.
- Swap the Module: Unbolt the old module and install the new one in its place.
- Reconnect Everything: Securely plug in the harness connectors and reinstall and reconnect the battery.
Important Note: After installation, you will likely need to perform a security relearn procedure and a Crankshaft Variation (CASE) relearn. The security relearn allows the vehicle to recognize the new PCM and start, while the CASE relearn synchronizes the PCM with the crankshaft position sensor to prevent false misfire codes. Many high-end scan tools can perform this procedure, or it can be done by any qualified technician.
Comprehensive Vehicle Compatibility for Part 9354896
While this is a perfect match for the 1999-2000 Silverado PCM, this versatile module also serves as the electronic control unit for a wide range of popular GM vehicles. Please verify your original part number matches 9354896, 09354896, or 19109040. This part fits:
- Chevrolet Corvette: 1999-2000
- Chevrolet Camaro: 1999-2002 (5.7L)
- Pontiac Firebird: 1999-2002 (5.7L)
- Chevrolet Silverado 1500/2500: 1999-2000
- GMC Sierra 1500/2500: 1999-2000
- Chevrolet Tahoe & Suburban 1500/2500: 2000
- GMC Yukon & Yukon XL 1500/2500: 2000
Frequently Asked Questions
How does the VIN programming process work?
After you place your order, you will need to provide us with your vehicle’s 17-digit VIN. Our technicians use this VIN to access the official GM database and download the correct software calibration for your specific vehicle. We then flash this software onto the module before shipping it to you.
Is this a simple plug-and-play installation?
Yes, because the module arrives programmed to your VIN, the physical installation is plug-and-play. However, as with any PCM replacement on these vehicles, you will need to perform a security relearn and a CASE relearn procedure after installation for the vehicle to start and run correctly without a check engine light.
Will I need to take my truck to a dealer after installation?
Not necessarily. While a dealership can perform the required relearn procedures, most independent repair shops with modern diagnostic scan tools can also complete the CASE and security relearns. This often saves you time and money compared to a dealer visit.
What is a CASE relearn and why is it important?
A CASE (Crankshaft Angle Sensor Error) relearn is a procedure that synchronizes the new PCM with the crankshaft position sensor. This allows the computer to accurately detect engine misfires. Without it, your vehicle may run fine but will likely have a persistent check engine light for a misfire code (P0300).
Does this PCM fit vehicles other than the Silverado 2500?
Absolutely. This module, part number 9354896, is the correct fit for a wide variety of GM cars, trucks, and SUVs from 1999-2002, including the Corvette, Camaro, Firebird, Sierra, Tahoe, and Yukon. Please see the full compatibility list in the description.
What information do you need from me to complete my order?
The only piece of information we need is your vehicle’s 17-digit VIN. You can typically find this on your driver’s side dashboard (visible through the windshield), on your door jamb sticker, or on your vehicle’s registration and insurance documents.