Restore Peak Performance to Your F-Body
Is your 1999 Chevrolet Camaro or Pontiac Firebird suffering from frustrating and unpredictable engine problems? Issues like stalling, rough idling, a persistent check engine light, or even a complete failure to start can often be traced back to 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 shifting and emissions control. When it begins to fail, the symptoms can be widespread and difficult to diagnose. This replacement Powertrain Control Module, service number 9374997, is the definitive solution to bring your 3.8L V6 back to life.
From the Diagnostic Bay
I remember a customer with a ’99 Firebird convertible who was at his wit’s end. He’d replaced plugs, wires, and the coil packs chasing an intermittent misfire that only happened under load. No shop could figure it out. When it finally got to our bay, we hooked up the scope and saw the injector pulse for cylinder 3 was dropping out randomly. The wiring was fine, the injector was new. The culprit? A failing driver inside the original PCM. We installed one of these VIN-programmed modules, performed the security relearn, and the car ran like it just rolled off the assembly line. It’s a reminder that sometimes the ‘brain’ is the source of the most elusive problems.
Is Your 1999 Camaro PCM Failing?
A faulty PCM can manifest in numerous ways, often mimicking other component failures. Before you start replacing sensors and ignition parts, review this list of common symptoms associated with a bad computer in your 1999 Camaro or Firebird. If you’re experiencing several of these, the PCM is a likely suspect.
Common Symptoms of a Bad PCM
- ✔ Check Engine Light: The light is on, and you may have codes related to PCM internal failure (e.g., P0600-P0606), sensor circuits, or communication errors.
- ✔ Engine Stalling or Misfiring: The engine may stall for no reason, either while driving or at idle. You might also experience random misfires that aren’t resolved by a typical ignition system service.
- ✔ No-Start Condition: The engine cranks but refuses to start. This can be due to the PCM not commanding fuel or spark.
- ✔ Poor Fuel Economy: A sudden and unexplained drop in your vehicle’s MPG can be caused by the PCM failing to calculate the correct air-fuel mixture.
- ✔ Erratic Transmission Shifting: On automatic models, you may experience harsh shifting, delayed engagement, or the transmission getting stuck in one gear (limp mode).
- ✔ Failed Emissions Test: The PCM directly controls the vehicle’s emissions systems. A faulty module can lead to an automatic failure at the testing station.
The ‘Programmed to Your VIN’ Advantage
What sets this module apart is our professional programming service. When you order, you provide us with your vehicle’s 17-digit VIN. We then use that information to flash the module with the latest, most up-to-date software directly from General Motors. This is not a generic, one-size-fits-all solution. This process ensures:
- Perfect Compatibility: The module is configured for your car’s specific options and calibrations.
- Latest Software Fixes: GM often released software updates to fix drivability issues, improve efficiency, and enhance performance. Your new PCM will have these updates pre-installed.
- No Dealer Visit Required: You save hundreds of dollars and the hassle of having your car towed to a dealership for expensive programming.
After installing the module, the only step required is a simple security relearn procedure, which you can do yourself in your driveway. This synchronizes the new PCM with your vehicle’s anti-theft system.
Vehicle Anti-Theft System (VATS) Relearn Procedure
This is a critical step. The engine will not run until this is completed. It takes about 30 minutes.
- Insert the ignition key and turn it to the ‘ON’ position (do not start the engine).
- Observe the ‘SECURITY’ light on the dashboard. It will be on or flashing. Leave the key in the ‘ON’ position for 10-11 minutes until the ‘SECURITY’ light turns off.
- Turn the ignition key to the ‘OFF’ position and wait 10 seconds.
- Repeat steps 1-3 two more times for a total of three 10-minute cycles.
- After the third cycle, the module has learned your key’s value. The vehicle is now ready to start.
Frequently Asked Questions
Do I need to have this computer programmed by a dealer?
No. We handle the programming for you before we ship the part. Simply provide your VIN during or after checkout, and it will arrive ready for installation and the security relearn procedure.
What is the security relearn procedure?
It is a required process to sync the new PCM with your car’s anti-theft system. It involves cycling the ignition key three times for 10 minutes each. We provide detailed instructions, and it requires no special tools.
Where is the PCM located on my 1999 Camaro or Firebird?
The Electronic Control Module is located in the engine bay, behind the passenger side (RH) strut tower. It is typically held in a black plastic bracket.
Will this part fit my V8 LS1 engine?
No, this specific module (9374997) is only for the 1999 Camaro and Firebird models equipped with the 3.8L V6 engine.
What information do you need from me?
We need your 17-digit Vehicle Identification Number (VIN) to ensure we load the correct GM-certified software for your car’s specific configuration.
Is this a guaranteed fix for my car’s problems?
This module will fix any issues directly caused by a faulty PCM. However, it’s crucial to properly diagnose your vehicle, as similar symptoms can be caused by other failing components like sensors, wiring, or fuel system parts.