Is Your GM Vehicle Running Poorly, Stalling, or Not Starting at All?
If you’re experiencing frustrating engine problems with your 1999 or 2000 GM car or van, the root cause might be a failing Powertrain Control Module (PCM). This computer is the brain of your vehicle’s engine, controlling everything from fuel mixture and ignition timing to transmission shifting and emissions. When it starts to fail, it can create a cascade of confusing and often intermittent issues that can be difficult to diagnose. Don’t let a faulty computer keep you off the road. This replacement PCM, part number 09361735, is the reliable and effective solution to restore your vehicle’s performance and dependability.
This is a thoroughly inspected, used component sourced from a salvaged vehicle, offering a dependable and cost-effective alternative to expensive dealership parts. The most critical part of the replacement process is programming, and we handle that for you. Before we ship the module, our technicians will flash it with the latest GM software updates specific to your vehicle’s Vehicle Identification Number (VIN). This ensures seamless integration and proper function right out of the box, eliminating the need for a costly trip to the dealer for programming.
From the Diagnostic Bay
We once had a 1999 Pontiac Grand Prix come into the shop with a classic mystery issue. The owner complained of random stalling at traffic lights and a persistent, but intermittent, check engine light for an O2 sensor heater circuit. He had already replaced the O2 sensor twice, along with the spark plugs and wires, with no success. After hooking up our diagnostic scanner and monitoring live data, we noticed the voltage readings for several sensors were erratic. Instead of continuing to chase individual sensor codes, we focused on the central processor – the PCM. Upon inspection, we found no physical damage, but experience pointed to an internal failure. We installed a VIN-programmed replacement module just like this one, and the car ran perfectly. The check engine light stayed off, the stalling disappeared, and all sensor readings stabilized. It’s a powerful reminder that when multiple, seemingly unrelated electrical issues pop up, the problem often lies with the central computer.
Symptoms of a Failing 1999 GM PCM Module
A failing PCM can manifest in numerous ways. If you’re noticing any of the following symptoms, it’s a strong indicator that your engine computer may need to be replaced:
- ✔ Check Engine Light: The light is on, and you may have codes related to multiple different sensors, communication errors (U-codes), or internal processor faults (P06xx codes).
- ✔ Engine Stalling or Misfiring: The engine may stall for no reason, run rough, or misfire, especially when warm.
- ✔ No-Start Condition: The engine cranks but refuses to start, despite having fuel and spark.
- ✔ Poor Fuel Economy: A sudden and unexplained drop in your vehicle’s MPG can be caused by the PCM failing to manage the fuel system correctly.
- ✔ Harsh or Incorrect Shifting: The PCM also communicates with the transmission, and a failure can lead to erratic shifting, getting stuck in a gear, or delayed engagement.
- ✔ Failed Emissions Test: An inability to pass an emissions test is often directly linked to a malfunctioning engine control module.
- ✔ Intermittent Electrical Issues: Seemingly random problems with gauges, fans, or other components can sometimes be traced back to the PCM.
Plug-and-Play Solution with VIN Programming
The biggest hurdle when replacing a modern vehicle computer is the need for specialized programming. This 1999 GM PCM Module solves that problem. We take your vehicle’s VIN and program the module before it ever leaves our facility. This critical step ensures that the computer has the correct software and calibrations for your specific engine, transmission, and options. This makes installation as straightforward as possible. Once installed, some vehicles may require a simple, key-on security relearn procedure or a Crankshaft Variation (CASE) relearn, which can often be performed with a capable bi-directional scan tool.
Guaranteed Fitment for a Wide Range of GM Vehicles
This module, identified by part number 09361735, is a direct replacement for a wide variety of popular General Motors vehicles from the 1999 and 2000 model years. Please verify your part number and check the compatibility list below to ensure this is the correct component for your car or van.
Compatible Models Include:
- 1999 Oldsmobile Eighty Eight, Cutlass, Intrigue, Silhouette
- 1999 Pontiac Grand Prix, Bonneville, Montana, Trans Sport
- 1999 Buick Riviera, Century, Park Avenue, LeSabre, Regal
- 1999 Chevrolet Lumina, Malibu, Monte Carlo, Venture
- 2000 Chevrolet Impala, Monte Carlo
- 2000 Pontiac Grand Prix, Bonneville
- 2000 Buick LeSabre
(Note: Please refer to the detailed fitment list at the top of the page to confirm compatibility with your specific engine and options.)
Frequently Asked Questions
Do I need to send my old PCM to you?
No, there is no core charge or need to send us your original module. This is a direct purchase. We program this replacement unit and ship it to you.
What information do you need from me?
After you complete your purchase, you must provide us with your vehicle’s 17-digit Vehicle Identification Number (VIN). We cannot program and ship your module without it. You can typically add this in the notes during checkout or send it to us in a message referencing your order number.
Is this a new part?
No, this is a high-quality used part that has been carefully removed from a salvaged vehicle. It has been inspected and tested to ensure it is fully functional before being programmed for your vehicle.
Will I need to do any additional programming after installation?
The main engine and transmission programming is done by us. However, depending on your specific vehicle, you may need to perform a security relearn procedure (also known as a Passlock or VATS relearn) and/or a Crankshaft Position Sensor Variation (CASE) relearn. These procedures are often required to sync the new PCM with your vehicle’s anti-theft system and crankshaft sensor, and can be performed with specific key cycles or a professional scan tool.
What is the warranty on this part?
This part comes with our standard warranty covering defects in the part itself. Please refer to our store’s warranty policy page for complete details on coverage and duration.