Restore Peak Performance to Your GM Vehicle
Is your Firebird, Camaro, or Silverado running rough, throwing confusing check engine lights, or refusing to start? The Powertrain Control Module (PCM) is the brain of your vehicle’s operation, and when it fails, it can cause a cascade of frustrating and hard-to-diagnose issues. I’ve seen it hundreds of times in my 20+ years in the shop: intermittent stalling, poor fuel mileage, and transmission shifting problems that all trace back to a faulty engine computer. This replacement 1999-2002 Firebird PCM is the reliable, straightforward solution to get your vehicle back on the road and running smoothly.
Unlike a generic part from a local store, this module comes fully programmed to your vehicle’s specific VIN with the latest software updates from General Motors. This critical step ensures all systems—from fuel delivery and ignition timing to transmission control—operate exactly as the manufacturer intended. You get a component that is ready for installation right out of the box, saving you from a costly and time-consuming trip to the dealership for programming.
Case Study: A Tricky Diagnosis
I remember a 2000 Silverado 1500 that came into my bay with a persistent, random misfire on cylinder 3. The owner had already replaced the spark plug, wire, and ignition coil to no avail. A compression test was good, and the injector was firing. After hooking up my scope, I noticed the control signal from the PCM to the coil was dropping out intermittently under load. The internal driver in the original PCM was failing—a classic heat-related failure on these units. We installed a VIN-programmed module just like this one, and the truck ran perfectly. It’s a reminder that sometimes the problem lies with the component giving the commands, not the one carrying them out.
Common Signs of a Failing PCM
- ✔ Persistent Check Engine Light (CEL) with communication codes like P0601 (Internal Control Module Memory Check Sum Error) or P0606 (PCM Processor Fault).
- ✔ Unexplained drop in fuel economy.
- ✔ Engine stalling, stumbling, or hesitating during acceleration.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ The engine cranks but will not start.
- ✔ Failure to pass an emissions test.
A Straightforward Guide to Installation
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- ✔ Locate the PCM: On F-body cars (Firebird/Camaro), the PCM is typically located in the engine bay, behind the passenger-side strut tower. On GM trucks (Silverado/Sierra/Tahoe), it’s usually found under the hood on the driver’s side, below or near the battery tray.
- ✔ Disconnect Connectors: Carefully unclip and remove the wiring harness connectors from the old PCM. These connectors are often color-coded (e.g., red and blue) to prevent mix-ups.
- ✔ Swap the Modules: Unbolt the old PCM from its mounting bracket and remove it. Secure the new module in its place.
- ✔ Reconnect Everything: Firmly plug the wiring harnesses into the new PCM until they click into place. Reconnect the negative battery terminal.
- ✔ Perform Security Relearn: Your vehicle’s anti-theft system (Pass-Key/Passlock) may need to be synchronized with the new PCM. This is a simple procedure: Turn the key to the ‘ON’ position for 10-15 minutes, then ‘OFF’ for 10 seconds. Repeat this cycle 3 times. On the fourth try, the vehicle should start.
Will This Fit My Vehicle?
This module is a direct replacement for service number 9354896 and other interchangeable part numbers like 19109040 and 09354896. It is guaranteed to fit the following GM models:
- CAMARO: 1999-2002 (5.7L)
- CORVETTE: 1999-2000
- FIREBIRD: 1999-2002 (5.7L)
- SIERRA 1500/2500 PICKUP: 1999-2000
- SILVERADO 1500/2500 PICKUP: 1999-2000
- SUBURBAN 1500/2500: 2000
- TAHOE: 2000 (Silverado Style)
- YUKON / YUKON XL 1500 / YUKON XL 2500: 2000
Frequently Asked Questions
What does ‘VIN Programmed’ mean?
It means we load your vehicle’s specific Vehicle Identification Number (VIN) and the latest GM-certified software onto the module before shipping. This ensures it communicates perfectly with your car’s engine, transmission, and security systems without needing a trip to a dealer.
Do I need to do anything after installing this part?
After physical installation, you will likely need to perform a simple security relearn procedure, which takes about 30 minutes using only your ignition key. We include instructions for this common and necessary step.
Will this fix my check engine light?
If the check engine light is caused by an internal failure of the original PCM (common codes P0601, P0602, P0606), then yes, this part is the correct fix. It is crucial to properly diagnose the root cause of the light before ordering.
What causes a PCM to fail?
PCMs are robust, but they can fail over time due to factors like excessive heat from the engine bay, vibration, or electrical system issues such as voltage spikes from a bad alternator or improper jump-starting.
Where is my VIN located?
You can typically find your 17-digit VIN on your vehicle’s registration, insurance card, or on a small plate on the driver’s side of the dashboard, visible through the windshield.