Is Your Vehicle Suffering from Mysterious Engine Problems?
There’s nothing more frustrating than a vehicle that won’t run correctly. If your 1999 Pontiac Montana, or another compatible GM vehicle, is experiencing issues like stalling, poor fuel economy, a persistent check engine light, or a no-start condition, the root cause is often the very brain of your engine: the Powertrain Control Module (PCM). This complex component manages everything from fuel injection and ignition timing to transmission shifting and emissions control. When it fails, the symptoms can be unpredictable and difficult to diagnose.
The Central Command for Your Engine
The PCM is the master computer responsible for ensuring your engine operates at peak efficiency and performance. It constantly analyzes data from dozens of sensors throughout your vehicle—like the oxygen sensors, crankshaft position sensor, and throttle position sensor—and makes real-time adjustments to keep everything in sync. A failing PCM can lead to a cascade of problems, making your vehicle unreliable and unsafe to drive.
From the Diagnostic Bay
We once had a 1999 Pontiac Grand Prix come into the shop with a maddening intermittent stalling issue. The owner had replaced the fuel pump, filter, and even the ignition coils, but the car would still die randomly at stoplights. After hours of chasing wires and checking sensors, we hooked up an advanced diagnostic tool and monitored the live data. We noticed the command for the fuel pump relay would flicker just before the engine quit. The relay itself was fine. The problem was a failing driver inside the original PCM. We installed a VIN-programmed module just like this one, and the car ran perfectly. It’s a classic example of how a faulty PCM can mimic other component failures.
Your Direct-Fit 1999 Montana PCM Solution
This is a genuine, tested OEM Powertrain Control Module, part number 09361735, sourced from a salvaged vehicle. It’s the definitive solution to get your vehicle back in top running condition without the high cost of a new dealership part. We take the guesswork out of the repair by programming the module specifically for your vehicle before it ever leaves our facility. All you need to do is provide us with your vehicle’s 17-digit VIN (Vehicle Identification Number) during checkout, and we’ll flash it with the latest GM-certified software updates. This ensures seamless communication with your vehicle’s other modules and a straightforward installation process.
Common Symptoms of a Failing PCM
- ✔ Persistent Check Engine Light (CEL)
- ✔ Engine stalling or shutting off while driving
- ✔ Rough or erratic idling
- ✔ Noticeable decrease in fuel efficiency
- ✔ Failure to pass emissions tests
- ✔ Harsh or incorrect transmission shifting
- ✔ Engine cranks but will not start
- ✔ Communication errors with diagnostic scan tools
Guaranteed Compatibility and Performance
This module is not just for a 1999 Montana PCM; it’s a versatile component that serves as the electronic control module for a wide array of popular GM vehicles from the late 90s and early 2000s. By providing your VIN, you guarantee that the software loaded onto this hardware is an exact match for your car’s original specifications, including its engine, transmission, and emissions equipment. This is the most reliable way to restore your vehicle’s factory performance and functionality.
Wide-Ranging Fitment Includes:
This module, identified by part number 09361735, fits numerous GM models, including but not limited to:
- Buick: Century, LeSabre, Park Avenue, Regal, Riviera
- Chevrolet: Impala, Lumina, Malibu, Monte Carlo, Venture
- Oldsmobile: Cutlass, Eighty Eight, Intrigue, Silhouette
- Pontiac: Bonneville, Grand Prix, Montana, Trans Sport
Please verify the part number and consult the detailed fitment list to ensure this is the correct part for your specific vehicle and options.
Frequently Asked Questions
Why do I need to provide my VIN?
Your Vehicle Identification Number (VIN) is essential because it allows us to program the PCM with the exact software and calibrations your specific vehicle requires. This includes information about your engine size, transmission type, and factory options, ensuring a perfect, plug-and-play installation.
Is this a plug-and-play part?
Because we program it to your VIN, it is designed to be as close to plug-and-play as possible. However, many GM vehicles of this era require a simple security relearn procedure after installation to sync the new PCM with your vehicle’s anti-theft system. This procedure can typically be done without any special tools and instructions are widely available online.
Where is the PCM located on my vehicle?
The location varies by model. On many vehicles listed, such as the Pontiac Montana, Grand Prix, and Chevrolet Venture, the PCM is located in the engine compartment, often inside the air filter box assembly for protection. On others, like the Oldsmobile Cutlass, it may be found under the dash. Always consult a repair manual for your specific model to confirm the location.
What is the difference between a PCM, ECM, and ECU?
ECU (Electronic Control Unit) is a generic term for any vehicle computer. ECM (Engine Control Module) specifically controls engine functions. A PCM (Powertrain Control Module) is an integrated unit that controls both the engine and the transmission functions. This part, 09361735, is a PCM.
Is this a new part?
No, this is a high-quality, used OEM part that has been carefully removed from a salvaged vehicle. Each unit is inspected and tested to ensure it is fully functional before being programmed and shipped.