Is your GM truck or SUV running rough, stalling, or refusing to start?
A failing Powertrain Control Module (PCM) is often the hidden culprit behind a host of frustrating issues, from a persistent Check Engine Light to a no-start condition that leaves you stranded. It’s the brain of your vehicle, and when it fails, everything grinds to a halt. This pre-programmed PCM is the direct, reliable solution to restore your vehicle’s performance and get you back behind the wheel with confidence.
Common Symptoms & Your Solution
If you’re experiencing issues like erratic engine performance, poor fuel economy, harsh transmission shifting, or diagnostic trouble codes that won’t clear, your original computer may have failed. This unit is the definitive fix for a faulty module, addressing problems that can mimic sensor or wiring failures. By purchasing this pre-programmed 1999 Escalade PCM, you are getting a straightforward solution that bypasses complex and expensive dealership diagnostics.
- ✔ VIN-Programmed for Your Vehicle: We flash this module with your vehicle’s specific VIN and the latest GM software updates before it ships. This ensures perfect communication with your vehicle’s systems right out of the box.
- ✔ Plug & Drive Installation: Because it arrives pre-programmed, you can avoid the time and expense of a trip to the dealership. In most cases, installation is as simple as disconnecting the battery, swapping the module, and reconnecting.
- ✔ Cost-Effective Repair: Get your truck back in service without the high cost of a brand-new computer. This is a dependable, tested part sourced from a salvaged vehicle, offering a smart and economical repair path.
- ✔ Broad Compatibility: This PCM is a direct replacement for multiple part numbers, including 09355699, 16266645, and 09366810, fitting a wide range of late-90s GM trucks, vans, and SUVs.
- ✔ Peace of Mind Included: This unit is backed by our one-year replacement warranty.
An Expert’s Note on 90s GM Electronics: The PCMs in this era of GM trucks are true workhorses, controlling everything from fuel mixture and spark timing to transmission shift points. When they fail, symptoms can be confusing. We’ve seen these modules cause issues that look like a bad fuel pump or a faulty transmission sensor. A correctly programmed, functional 1999 Escalade PCM is the foundation of a reliable vehicle. Don’t waste time and money chasing phantom problems; start with the source.
Frequently Asked Questions
How do I provide my Vehicle Identification Number (VIN)?
After you complete your purchase, you will need to send us your 17-digit VIN. We cannot program and ship the module without it. You can typically find your VIN on your vehicle’s dashboard (visible through the windshield), on the driver’s side door jamb sticker, or on your insurance and registration documents.
Is any additional programming required after I install it?
No. This PCM is programmed to your VIN and arrives ready for installation. In some vehicles, a security relearn procedure (often called a CASE relearn or anti-theft relearn) may be necessary, which can typically be done without special tools. Instructions are widely available online for this simple procedure.
How do I know if my original PCM is bad?
Common signs of a failing PCM include a no-start condition where the engine cranks but won’t fire, multiple unrelated diagnostic codes, a Check Engine Light that stays on despite repairs, or intermittent stalling. A professional mechanic can perform tests to confirm the PCM is the issue, but these symptoms are strong indicators.
Will this fix my Check Engine Light?
If the Check Engine Light is on due to an internal failure of the original PCM, this replacement unit will solve the problem. However, if the light is on because of a faulty sensor or another issue with the vehicle, you will still need to repair that underlying problem. This module will ensure the vehicle’s computer system is operating correctly.
What’s 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 one, is more integrated and controls both the engine and the transmission, which is common in these GM vehicles.
Is this a difficult part to replace?
For someone with basic mechanical skills, replacement is straightforward. The PCM is usually located in the engine compartment. The process involves disconnecting the vehicle’s battery, unplugging the electrical connectors from the old module, unbolting it, and then installing the new one in the reverse order. The most important step is ensuring the battery is disconnected before you begin.