Restore Peak Performance to Your GM Truck or SUV
Is your 1999-2000 Cadillac Escalade, Chevy Silverado, or GMC Sierra running poorly? Experiencing erratic shifting, a persistent check engine light, or even a no-start condition? The Powertrain Control Module (PCM), often called the vehicle’s brain, is a common culprit for these frustrating issues. This vital component manages everything from fuel injection and ignition timing to transmission shift points and emissions controls. When it fails, the entire vehicle’s performance suffers. This replacement module, part number 16263494, is the definitive solution to get your vehicle back on the road and running like new.
From the Diagnostic Bay
I once had a 2000 Chevy Tahoe come into the shop with what the owner was certain was a failing transmission. It was shifting hard between first and second and occasionally wouldn’t shift into overdrive at all. He had already spent hundreds on a transmission fluid flush with no improvement. After hooking up the scan tool, I noticed erratic data from the vehicle speed sensor and inconsistent commands to the transmission solenoids. Instead of jumping to a costly transmission replacement, we inspected the PCM. We found minor corrosion on one of the pins. Swapping in a properly programmed PCM like this one solved the problem instantly. The transmission was fine all along; it was just receiving bad information from a faulty computer. It’s a classic case of treating the disease, not just the symptoms.
Is Your Vehicle Showing These Symptoms?
- ✔ Persistent Check Engine Light (CEL) with various trouble codes.
- ✔ Rough or inconsistent engine idle.
- ✔ Poor fuel economy that has gotten noticeably worse.
- ✔ Harsh or delayed automatic transmission shifting.
- ✔ Engine stalling, hesitation, or misfiring.
- ✔ The vehicle fails to start, even with a good battery and starter.
- ✔ Failure to pass state emissions testing.
The Plug-and-Play Solution: A Programmed 1999-2000 Escalade PCM
What sets this module apart is our professional programming service. Before we ship your part, we flash it with the latest official GM software updates specific to your vehicle’s 17-digit Vehicle Identification Number (VIN). This critical step ensures that the module is perfectly matched to your vehicle’s engine, transmission, and factory options. This means no expensive trips to the dealership for programming. It arrives at your door ready for a straightforward installation. This process also helps resolve many technical service bulletin (TSB) issues that GM addressed with software revisions over the years, giving you a component that often performs better than the original one did when it was new.
This PCM is a direct replacement for multiple part numbers, including 16263494, 16265035, and 8162634940. It fits a wide array of popular GM vehicles from the era, including the Chevy Express, GMC Savana, S10/Sonoma, Blazer/Jimmy, and many more. Please verify your original part number and consult the detailed fitment list to ensure perfect compatibility.
Frequently Asked Questions
What is a PCM and what does it do?
The Powertrain Control Module (PCM) is the central computer that controls your vehicle’s engine and transmission systems. It takes data from dozens of sensors to manage fuel delivery, spark timing, emissions systems, and automatic transmission shifting to ensure optimal performance, fuel efficiency, and low emissions.
Do I need to get this module programmed?
No. We handle the programming for you before shipment. You must provide us with your vehicle’s VIN during checkout. This ensures the module is ready to install and function correctly the moment you receive it, saving you time and money.
Where do I find my VIN?
Your 17-digit Vehicle Identification Number (VIN) can be found on your vehicle’s registration, insurance card, or on a metal plate on the driver’s side of the dashboard, visible through the windshield.
Is this a difficult part to install?
For someone with basic mechanical skills, replacing a PCM is typically straightforward. It usually involves disconnecting the battery, unplugging the electrical connectors from the old module, unbolting it, and then installing the new one in the reverse order. However, we always recommend consulting a repair manual for your specific vehicle or having it installed by a qualified technician.
What if my original part number isn’t 16263494?
This module is a direct replacement for several part numbers, including 16265035, 8162634940, 218-11787, and 21811787. As long as your original module’s part number is on this list, this unit will work for your vehicle once programmed to your VIN.