Is Your 1999 Escalade or GM Truck Running Rough?
The Powertrain Control Module (PCM), often called the engine computer, is the electronic brain of your vehicle. It manages everything from fuel injection and ignition timing to transmission shifting and emissions control. When it starts to fail, it can cause a wide range of frustrating and difficult-to-diagnose issues. If you’re dealing with a no-start condition, erratic engine behavior, or a persistent check engine light that points to a faulty computer, you’ve come to the right place for a reliable, cost-effective solution.
This is a genuine, used OEM Powertrain Control Module that has been meticulously tested and is ready for installation. We take the guesswork and high cost out of the repair by programming the module specifically for your vehicle using your VIN. This ensures that it has the correct software and calibrations straight from GM, often including updates that resolve factory-known issues.
From the Diagnostic Bay
We had a 1999 Chevy Tahoe come into the shop that had its owner pulling his hair out. It would randomly stall at stoplights and had a harsh 1-2 shift that felt like being rear-ended. The owner had already replaced the fuel pump, spark plugs, and even the transmission solenoids with no luck. After hooking up our scanner, we noticed erratic data from the PCM and communication dropouts. We suspected the computer itself was the culprit. Instead of a costly new unit from the dealer, we sourced a quality used module like this one, programmed it to the Tahoe’s VIN, and installed it. The stalling vanished, the transmission shifted like new, and the customer was back on the road for a fraction of the cost. It’s a classic case of the vehicle’s brain having a glitch, and a direct replacement is the only true fix.
Common Symptoms of a Failing PCM
- ✔ Check Engine Light is on with codes related to the PCM (e.g., P0600-P0606).
- ✔ Engine cranks but refuses to start.
- ✔ Poor fuel economy and decreased engine power.
- ✔ Rough or erratic idling.
- ✔ Harsh or incorrect automatic transmission shifting.
- ✔ Intermittent stalling for no apparent reason.
- ✔ Communication issues with diagnostic scan tools.
Why Choose Our Programmed 1999 Escalade PCM?
Getting your truck back on the road shouldn’t be complicated or excessively expensive. Our service is designed to provide a straightforward, dependable repair. This isn’t just a used part pulled from a yard; it’s a complete solution. We use your vehicle’s unique 17-digit Vehicle Identification Number (VIN) to load the latest, most stable software calibration directly from General Motors. This process ensures the PCM is a perfect match for your vehicle’s specific engine, transmission, and emissions equipment.
Key Benefits:
- Plug & Play Installation: Because we program the module before shipping, you can avoid a trip to the dealership for expensive flashing. In most cases, you will only need to perform a simple security relearn procedure which you can do yourself in your driveway.
- Latest GM Software: Your module will be loaded with the newest updates, which can improve performance, fuel economy, and drivability over the original software.
- Cost-Effective Solution: Get the reliability of a properly functioning OEM part without the high price tag of a brand-new module from a dealer.
- Guaranteed Compatibility: By using your VIN, we guarantee this module will be correct for your vehicle.
Part Number Compatibility
This module is a direct replacement for a wide range of GM trucks and vans. It is compatible with service number 09366810 and will interchange with the following part numbers: 09355699, 16266645, 9355699, 16250279, 16258815, and 9366810. Please verify one of these numbers is on your original module to ensure proper fitment.
Frequently Asked Questions
Do I need to get this computer programmed?
No. We handle all the programming for you before we ship the part. Simply provide us with your VIN during or after checkout, and we will flash the module with the latest GM software for your specific vehicle.
What is a VIN and why do you need it?
The VIN is your vehicle’s 17-digit identification number, like a serial number. It contains critical information about your truck’s engine, transmission, and other options. We use it to load the exact correct software file for your vehicle, ensuring perfect compatibility.
Is this a new part?
This is a high-quality, tested, and fully functional used part sourced from a salvaged vehicle. Each unit is inspected to ensure it is in excellent working condition before being programmed and shipped.
Will this fix my transmission shifting problems?
In many cases, yes. The PCM controls both the engine and the transmission. A failing PCM can cause harsh shifts, delayed shifting, or failure to shift. If your issues are electronic in nature, this module is a very likely solution.
What is the security relearn procedure?
After installation, you may need to perform a simple security relearn to sync the new PCM with your vehicle’s anti-theft system. This typically involves turning the key to the ‘ON’ position for 10 minutes, then ‘OFF’ for 10 seconds, and repeating this cycle three times. This allows the vehicle to recognize the new computer.