Programmed 1999 Escalade PCM 09366810 | Flashed to Your VIN

Is Your 1999 Escalade or GM Truck Running Rough?

If you’re dealing with a frustrating no-start condition, a persistent check engine light, or erratic engine performance in your 1999 Cadillac Escalade, a failing Powertrain Control Module (PCM) is a very likely culprit. As a mechanic with over two decades of experience under the hood of these GM trucks, I’ve seen firsthand how a faulty computer can bring an otherwise solid vehicle to a dead stop. It’s the central command center, and when it fails, nothing works right.

This isn’t just a replacement part; it’s a complete, ready-to-install solution. We are offering a reliable, used OEM Electronic Control Module that has been meticulously tested and is ready for service. The real value is in our programming service: we flash the module with the latest GM-certified software, specifically matched to your vehicle’s VIN. This eliminates the need for an expensive trip to the dealership and ensures your engine and transmission operate exactly as the manufacturer intended.

Why Choose Our Programmed 1999 Escalade PCM?

Forget the hassle of finding a local shop with the right tools or paying dealer prices for programming. We handle the technical work for you, delivering a part that’s truly plug-and-play.

• ✔ VIN-Programmed for You: Simply provide your Vehicle Identification Number (VIN) after your purchase, and we’ll program the module before it ships.
• ✔ Cost-Effective Solution: Get a dependable, tested OEM part with professional programming for a fraction of the cost of a new module and dealer labor.
• ✔ Restores Original Performance: A correctly functioning PCM resolves common issues like poor fuel economy, harsh shifting, and false sensor codes.
• ✔ Latest GM Software Updates: Your module will be loaded with the newest calibrations from General Motors, addressing known bugs and improving drivability.

Expert Pro Tip: Before you condemn your old PCM, take a moment to inspect the main engine wiring harness grounds. On these GMT400 platforms, there’s a critical ground bolt on the thermostat housing stud. I’ve seen countless vehicles in my shop where a loose or corroded ground there caused intermittent no-starts and communication errors that mimicked a failed computer. A quick clean and tighten can sometimes save you a lot of diagnostic headaches.

Easy Installation: Get Back on the Road Fast

Installing your new PCM is a straightforward process that you can do in your own driveway with basic hand tools. No special equipment is needed.

1. Safety First: Disconnect the negative terminal from your vehicle’s battery.
2. Locate the PCM: On most of these trucks and vans, the PCM is located in the engine compartment, typically on the driver’s side fender or near the battery.
3. Disconnect the Connectors: Carefully unclip the wiring harness connectors from the old module. Inspect the pins for any corrosion or damage.
4. Swap the Modules: Unbolt the old PCM and remove it. Mount your new, pre-programmed module in its place.
5. Reconnect Everything: Securely plug the wiring harnesses into the new PCM and reconnect your battery terminal. Your vehicle is now ready to start.

Guaranteed Compatibility

This module is a direct replacement for several part numbers. Please verify that your original module has one of the following numbers printed on its label:

Interchangeable Part Numbers: 09355699, 16266645, 9355699, 16250279, 16258815, 09366810, 9366810

This part will fit the following vehicles with service ID 9355699: