Restore Peak Performance to Your LS1-Powered Vehicle
The Powertrain Control Module, or PCM, is the central computer of your 1999-2002 Pontiac Firebird. It acts as the brain, meticulously managing everything from the air-fuel mixture and ignition timing to transmission shift points and emissions equipment. When this critical component begins to fail, it can cause a wide range of frustrating and often difficult-to-diagnose issues. This replacement PCM, part number 09354896, is the definitive solution to restore your vehicle’s factory performance, reliability, and drivability.
Unlike a generic part from a local store, this module is not a one-size-fits-all solution. It is professionally flashed with the latest official GM software updates specifically for your vehicle. By providing us with your Vehicle Identification Number (VIN) during checkout, you receive a module that is precisely calibrated for your Firebird’s engine, transmission, and factory options. This eliminates the need for expensive and time-consuming programming at a dealership.
From the Diagnostic Bay…
We had a 2001 Firebird Trans Am towed in that would crank strong but wouldn’t start. The owner had already replaced the fuel pump and crank sensor with no luck. We confirmed it had fuel pressure, but a quick check with a noid light and spark tester showed no injector pulse and no spark. The scan tool refused to communicate with the PCM. After verifying all power and ground circuits to the module were intact, the diagnosis was clear: internal PCM failure. A replacement module, programmed to the car’s VIN just like this one, was installed. After performing the required security relearn procedure, the LS1 fired up instantly, and another classic F-body was saved from becoming a permanent garage fixture.
Common Symptoms of a Failing GM PCM
- โ Check Engine Light: The most common sign, often with codes related to internal module errors (e.g., P0601-P0606), sensor circuits, or communication faults.
- โ No-Start or Hard Starting: The engine may crank but fail to start, or require extended cranking to fire up, especially when warm.
- โ Engine Stalling or Rough Idle: Your vehicle may stall unexpectedly at stops or idle erratically as the PCM struggles to maintain engine stability.
- โ Poor Fuel Economy: An inefficiently running engine, due to incorrect fuel and spark calculations, will lead to a noticeable drop in MPG.
- โ Erratic Transmission Shifting: The PCM also controls the transmission, and a failing unit can cause harsh shifts, delayed engagement, or getting stuck in a single gear.
- โ Failure to Communicate: If your mechanic’s diagnostic scan tool cannot connect to the vehicle’s computer, it’s a strong indicator that the PCM itself is the problem.
The Direct Solution: A Programmed 1999-2002 Firebird PCM
Choosing the right replacement is critical. Our process ensures a seamless repair. We take your vehicle’s VIN and use it to load the exact GM-specified calibration file onto the module. This ensures that all systems function as the manufacturer intended. This is a direct-fit replacement for part numbers 09354896, 9354896, and 19109040, and is compatible with a wide range of GM cars and trucks from that era, including the Camaro, Corvette, Silverado, and Tahoe.
Installation and Security Relearn
Physically swapping the module is straightforward. Disconnect the battery, locate the PCM (typically behind the right-hand strut tower on a Firebird/Camaro), disconnect the electrical harnesses, and unbolt the unit. Install the new module in the reverse order. However, you MUST perform a Vehicle Anti-Theft System (VATS) relearn procedure to sync the new PCM with your vehicle’s ignition key. This is a simple process you can do yourself:
- Turn the key to the “ON” position (do not start the engine).
- Attempt to start the engine. It will crank but not start. Leave the key in the “ON” position.
- Wait 10-11 minutes. The “Security” light on the dash should turn off.
- Within 30 seconds, turn the key to “OFF” and then back to “ON”.
- Repeat steps 3 and 4 two more times for a total of three 10-minute cycles.
- After the third cycle, the vehicle will have learned the new PCM, and you can start the engine.
Frequently Asked Questions
What exactly does the Powertrain Control Module do?
The PCM is the master computer for your vehicle’s engine and transmission. It takes data from dozens of sensors (like oxygen, throttle position, and temperature sensors) and uses that information to control fuel injectors, spark plugs, and transmission solenoids to ensure optimal performance, fuel efficiency, and low emissions.
Is this part difficult to install?
The physical installation is simple, typically requiring only basic hand tools to unbolt the old module and install the new one. The most critical part of the process is performing the VATS security relearn procedure afterward, which does not require any special tools.
What is the “VATS relearn” and why is it required?
VATS (Vehicle Anti-Theft System) is GM’s security system that prevents the car from being started without a correct key. The PCM is a core part of this system. When you install a new PCM, you must perform the relearn procedure to synchronize it with your key and BCM (Body Control Module), allowing the engine to start.
How do I provide my VIN for programming?
After placing your order, please send us a message with your 17-digit Vehicle Identification Number (VIN). We cannot program and ship your module without it. You can typically find your VIN on the driver’s side dashboard (visible through the windshield) or on your vehicle’s registration and insurance documents.
Will this fix my check engine light?
If the check engine light is on due to an internal failure of your original PCM, then yes, this part will solve the problem. However, if the light is on for another reason, such as a faulty sensor or wiring issue, you will still need to diagnose and repair that separate problem.
What causes a PCM to fail?
PCM failure can be caused by several factors, including electrical shorts, voltage spikes from a bad alternator or improper jump-starting, excessive heat and vibration over time, and moisture intrusion leading to corrosion on the circuit board.