Is Your GM Vehicle Running Rough, Stalling, or Showing a Check Engine Light?
If your late 90s or early 2000s GM vehicle is experiencing frustrating issues like erratic shifting, poor fuel economy, a persistent check engine light, or even a no-start condition, the problem may lie with its electronic brain: the Powertrain Control Module (PCM). The PCM is the central command center for your vehicle’s engine and transmission, and when it fails, it can cause a wide range of confusing and performance-robbing symptoms. Don’t let a faulty computer keep your reliable car off the road. This is a direct replacement, used OEM Powertrain Control Module, part number 09361735, programmed specifically for your vehicle.
From the Diagnostic Bay
We once had a 1999 Pontiac Grand Prix come into the shop with what the owner was sure was a failing transmission. It was shifting hard, hesitating between gears, and sometimes wouldn’t go into overdrive. He had already spent a small fortune at a transmission shop that couldn’t find anything mechanically wrong. After plugging in our scanner, we noticed erratic data signals coming from the PCM to the transmission solenoids. The computer itself was sending faulty commands. We installed a correctly programmed PCM, performed the security relearn, and the car drove like new. It wasn’t a bad transmission at all; it was a confused computer. This is a common story for vehicles of this era, and a correctly programmed PCM is often the simple, overlooked solution.
Common Symptoms of a Failing PCM
- ✔ Persistent Check Engine Light (CEL) with various trouble codes.
- ✔ Engine stalling, stumbling, or misfiring for no apparent reason.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Noticeable decrease in fuel economy.
- ✔ Failure to pass an emissions or smog test.
- ✔ The vehicle cranks but refuses to start.
- ✔ Communication errors with diagnostic scan tools.
The Right Solution for Your 1999 GM PCM
Finding a replacement computer for an older vehicle can be a challenge. Simply pulling one from a salvage yard won’t work, as the internal programming is specific to the original vehicle’s options and Vehicle Identification Number (VIN). Our solution eliminates the guesswork and the expensive trip to a dealership. We take a genuine, used OEM module and flash it with the latest official GM software updates tailored precisely to your car’s VIN. This ensures that all engine, transmission, and emissions parameters are set correctly for optimal performance and longevity. This is the most reliable and cost-effective way to restore your vehicle’s factory operation.
This module, part number 09361735, is compatible with a wide array of popular GM models from 1999 to 2000, including the Buick Riviera, Pontiac Grand Prix, Chevrolet Impala, Oldsmobile Intrigue, and many more. Please verify the part number and consult the detailed fitment list to ensure this is the correct component for your car.
Simple Process, Professional Results
Getting your car back on the road is easy:
- Place Your Order: Purchase this PCM through our secure checkout.
- Provide Your VIN: After your purchase, reply to your order confirmation email with your vehicle’s 17-digit VIN. This is crucial for the programming process.
- We Program & Ship: Our technicians will flash the module with your vehicle’s specific data and the newest GM updates before shipping it directly to you.
Once installed, some vehicles may require a simple security relearn procedure (often called a VATS relearn), which can typically be done without special tools. This procedure pairs the new computer with your vehicle’s anti-theft system. Instructions for this are widely available online for specific models.
What is a PCM and what does it do?
The Powertrain Control Module (PCM) is your vehicle’s main computer. It controls all aspects of engine performance, including fuel injection, ignition timing, and emissions systems, as well as the operation of the automatic transmission. It’s essential for the vehicle to run correctly.
Why do I need to provide my VIN?
Your Vehicle Identification Number (VIN) contains critical information about your car’s specific engine, transmission, and factory-installed options. We use the VIN to load the exact GM-approved software onto the PCM, ensuring it works perfectly with your vehicle, just like the original one did.
Is this a new part?
No, this is a genuine, used OEM part sourced from a salvaged vehicle. Each unit is inspected and tested to ensure it is fully functional before being programmed and shipped. This provides OEM quality and reliability at a fraction of the cost of a new module.
Will I need to do anything after installing it?
After physical installation, you may need to perform a security relearn procedure to sync the PCM with your vehicle’s anti-theft system. This is a standard step for many GM vehicles of this era and can often be done at home. We recommend searching for the specific procedure for your year and model.
How do I know if my PCM is actually bad?
Diagnosing a bad PCM can be tricky. The best way is to have a qualified mechanic perform a full diagnostic scan. However, if you are experiencing multiple symptoms from our list above and have ruled out other common issues (like bad sensors, wiring, or spark plugs), the PCM is a very likely culprit.