Restore Peak Performance to Your GM Truck or Van
Is your Chevrolet, GMC, or Isuzu truck suffering from perplexing issues like a persistent check engine light, poor fuel economy, rough idling, or even a no-start condition? These are classic signs of a failing Powertrain Control Module (PCM), the central computer that manages your vehicle’s engine and transmission. A faulty PCM can disrupt everything from fuel injection to spark timing, leading to a frustrating and unreliable driving experience. This listing offers a direct, reliable solution: a quality used PCM, part number 09355699, that arrives at your door fully programmed for your specific vehicle.
The Heart of Your Vehicle’s Operation
The PCM is more than just a component; it’s the brain of your vehicle. It constantly processes data from dozens of sensors to make real-time adjustments, ensuring your engine runs efficiently and powerfully. When it starts to fail, the symptoms can be intermittent and difficult to diagnose, often mimicking other part failures. Replacing sensors and other components without addressing a faulty PCM can lead to wasted time and money. Our solution takes the guesswork out of the repair by providing the core component you need, ready for installation.
From the Diagnostic Bay
We had a 1999 Chevy Tahoe in the shop that was driving the owner crazy. It would stall randomly at red lights and threw a mix of O2 sensor and misfire codes. The owner had already replaced the plugs, wires, and a couple of sensors with no luck. After hooking up our scanner and monitoring live data, we noticed the fuel trim and timing values were erratic and inconsistent, even at idle. This pointed us away from the individual components and towards the central controller. We sourced a reliable, programmed PCM, installed it, performed the necessary security relearn, and the Tahoe ran like new. It’s a classic case where the ‘brain’ was the problem, not the ‘body’.
Symptoms of a Failing 09355699 PCM
- ✔ Persistent Check Engine Light (CEL) with various trouble codes.
- ✔ Vehicle refuses to start or has difficulty starting.
- ✔ Rough or unstable engine idle.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Engine stalling or hesitation during acceleration.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Failure to pass emissions testing.
A Hassle-Free, Programmed PCM 09355699 Solution
The biggest hurdle when replacing a modern vehicle computer is the programming. Typically, this requires a trip to the dealership and expensive specialty tools. We eliminate that step entirely. When you purchase this module, we will request your vehicle’s 17-digit Vehicle Identification Number (VIN). Our technicians will then flash the unit with the latest GM-approved software calibration specific to your VIN. This ensures that the computer is a perfect match for your vehicle’s engine, transmission, and factory options. This Programmed PCM 09355699 is a genuine, used component sourced from a salvaged vehicle and has been thoroughly inspected for functionality.
Installation and Setup
While this module comes programmed, please be aware that on many GM vehicles of this era, a security relearn procedure (often called a ‘CASE’ or Crankshaft Variation Relearn) may be necessary after installation. This procedure syncs the new PCM with your vehicle’s anti-theft system and crankshaft position sensor. It is a simple procedure that can be performed by most qualified technicians with a capable scan tool. We recommend professional installation to ensure all necessary steps are completed correctly.
Guaranteed Fitment
This Electronic Control Module is a direct replacement for part number 09355699 and several other interchangeable part numbers including 16266645, 9355699, 16250279, 16258815, 09366810, and 9366810. It is compatible with a wide range of 1998 and 1999 GM and Isuzu models. Please verify your part number and consult the detailed fitment list below to ensure compatibility with your exact vehicle.
Frequently Asked Questions
Do I need to do any programming myself?
No. We handle all the programming before the part is shipped to you. We use your VIN to load the correct software and calibrations for your specific vehicle, saving you a trip to the dealer.
How do I provide my VIN?
After you complete your purchase, we will send you a message requesting your 17-digit Vehicle Identification Number (VIN). We cannot ship your part until we receive this information.
Is this a new part?
No, this is a high-quality, tested, and functional used part that has been sourced from a salvaged vehicle. This provides a cost-effective solution compared to a new module from a dealership.
What is a CASE Relearn and will I need to do it?
A CASE (Crankshaft Angle Sensor Error) Relearn is a procedure that synchronizes the new PCM with your engine’s crankshaft position sensor. Most GM vehicles of this period require this procedure after a PCM replacement to prevent a check engine light. A qualified mechanic with a professional-grade scan tool can perform this for you.
Will this computer fix my vehicle’s problem?
This PCM will resolve any issues directly caused by a faulty computer. However, it is crucial that your vehicle has been properly diagnosed. This part will not fix problems related to other faulty sensors, wiring, or mechanical components.