Restore Peak Performance to Your GM Truck or SUV
Is your trusty 1998-1999 GM truck, van, or SUV suffering from frustrating issues like a persistent Check Engine Light, erratic shifting, a rough idle, or even a no-start condition? These are classic signs of a failing Powertrain Control Module (PCM). Instead of letting a faulty computer sideline your reliable vehicle, take control with this professionally programmed, direct-fit replacement PCM. This isn’t just a part; it’s the brain of your vehicle, restored to perfect working order and ready for immediate installation.
Common Symptoms of a Failing GM PCM & Your Solution
A failing engine computer can cause a cascade of confusing problems that can be difficult to diagnose. If you’re experiencing any of the following, this module is your definitive solution:
- Persistent Check Engine Light (CEL) with codes like P0601 (Internal Control Module Memory Check Sum Error) or other communication-related faults.
- Erratic Transmission Behavior, such as harsh shifting, getting stuck in gear, or delayed engagement.
- Poor Engine Performance, including misfires, stalling, hesitation, and a noticeable loss of power or fuel economy.
- Intermittent or Complete No-Start Conditions, where the engine cranks but refuses to fire up.
- Failure to Communicate with diagnostic scan tools.
This Programmed 9366810 PCM is the answer. We take a genuine, road-tested GM computer and flash it with the latest official software updates specifically for your vehicle’s VIN. This ensures all systems—engine, transmission, and emissions—operate exactly as the factory intended.
Features & Benefits
- ✔ VIN-Programmed for Your Vehicle: We flash the module with your specific Vehicle Identification Number, ensuring 100% compatibility and eliminating the need for an expensive trip to the dealership for programming.
- ✔ Plug & Play Installation: Once you receive the unit, installation is straightforward. Simply disconnect the battery, swap the modules, and perform the security relearn procedure (instructions available online). No special tools required.
- ✔ Updated GM Software: Your computer will be loaded with the newest software available from General Motors, which often corrects factory bugs and improves overall drivability, transmission shifting, and fuel efficiency.
- ✔ Cost-Effective & Reliable: Get the performance of a new module without the high cost. This is a genuine used GM part from a salvaged vehicle, cleaned and prepared for its next life in your truck.
- ✔ Peace of Mind Guarantee: This unit is backed by our one-year replacement warranty.
From the Technician’s Bench: We recently had a customer with a ’99 Suburban used for towing. It had a bizarre issue where it would lose power and the transmission would shift erratically only after 20 minutes of driving. They had replaced sensors and solenoids to no avail. The issue was a heat-soaked PCM causing internal communication failures. Installing a properly flashed Programmed 9366810 PCM didn’t just solve the towing problem—it also cured a slight engine hesitation the owner didn’t even realize was related. Getting the programming right is the key to fixing the root cause, not just the symptoms.
Frequently Asked Questions
Do I need to do anything after installing this PCM?
Yes. After installation, you will need to perform a simple security relearn procedure, also known as the Passlock or VATS relearn. This procedure syncs the new computer with your vehicle’s anti-theft system and can typically be done in your driveway in about 30 minutes with just your ignition key. Instructions are widely available online for your specific model.
How do I provide my VIN?
After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). You can typically add it as a note during checkout or send it to us in a message referencing your order number. We cannot program or ship your part without it.
Is this a brand new computer?
No, this is a high-quality, used OEM (Original Equipment Manufacturer) computer that was sourced from a salvaged vehicle. Each unit is inspected to ensure it is in good working condition before being programmed and shipped.
What is the difference between a PCM, ECM, and ECU?
The terms are often used interchangeably. ECU (Engine Control Unit) is a general term. ECM (Engine Control Module) typically controls only engine functions. A PCM (Powertrain Control Module), like this unit, is more integrated and controls both the engine and the transmission functions, which is common in these GM vehicles.
How can I be sure this fits my vehicle?
This Programmed 9366810 PCM fits a wide range of 1998-1999 GM models. Please review the detailed fitment list in this description. The most critical step is providing us with your VIN, which we use to guarantee it is programmed perfectly for your truck’s specific options and configuration.