Restore Peak Performance to Your GM Truck or Van
Is your GMC Yukon, Chevy Silverado, or Express van suffering from mysterious performance issues? A faulty Powertrain Control Module (PCM) is often the hidden culprit behind a wide range of problems, from a persistent check engine light to erratic shifting and poor fuel economy. This direct-replacement PCM, part number 218-11787, is the definitive solution to restore your vehicle’s factory performance and reliability. As the central computer for your vehicle, the PCM manages critical engine and transmission functions. When it fails, the symptoms can be confusing and lead to costly, incorrect repairs. By replacing your old module with this professionally programmed unit, you are addressing the core of the problem.
Solving Issues with a 1999-2000 Yukon PCM
The PCM in your late 90s to early 2000s GM vehicle is responsible for everything from fuel injector timing and spark advance to transmission shift points and torque converter lockup. Over time, internal components can degrade from heat, vibration, and electrical stress. This degradation leads to incorrect calculations and commands, causing the symptoms you’re experiencing. Our replacement module eliminates the guesswork. We take your vehicle’s Vehicle Identification Number (VIN) and flash the module with the latest, most stable GM-approved software specifically for your vehicle’s configuration. This ensures all parameters are set correctly, restoring the precise control your engine and transmission need to operate efficiently.
Common Symptoms of a Failing PCM
- ✔ Persistent Check Engine Light (CEL) with various trouble codes.
- ✔ Rough or unstable engine idle.
- ✔ Poor acceleration or a noticeable loss of power.
- ✔ Decreased fuel efficiency for no apparent reason.
- ✔ Harsh, delayed, or erratic automatic transmission shifting.
- ✔ Engine stalling or failing to start, especially when warm.
- ✔ Communication errors with diagnostic scan tools.
Don’t let a failing computer keep your reliable truck or van off the road. This replacement 1999-2000 Yukon PCM is a plug-and-play solution designed to get you back to driving with confidence. The process is simple: place your order, provide us with your VIN, and we’ll ship a module that is programmed and ready for installation. In most cases, you will need to perform a simple security relearn procedure after installation, which can be done without special tools and typically takes 10-30 minutes. Instructions for this procedure are widely available online for your specific model.
This module is a direct replacement for multiple part numbers, including 16263494 and 16265035, and fits a wide array of GM vehicles from 1998 to 2002, such as the Chevrolet Silverado, Suburban, Tahoe, Express, Astro, S10, and Blazer, as well as the GMC Sierra, Savana, Safari, Jimmy, and Sonoma. Please verify the part number and check the detailed fitment list to ensure compatibility with your exact vehicle.
Frequently Asked Questions
Do I need to program this PCM?
No. We handle all the programming for you before shipment. Simply provide your vehicle’s VIN during or after checkout, and we will flash the module with the latest GM software specific to your vehicle.
What are the most common signs my PCM is failing?
The most common symptoms include a check engine light, poor engine performance, reduced fuel economy, erratic transmission shifting, and intermittent starting issues.
Is this a difficult part to install?
The physical installation is straightforward. It typically involves disconnecting the battery, unplugging the electrical connectors, and unbolting the old module. After installing the new one, you will likely need to perform a security relearn procedure, which syncs the new PCM with your vehicle’s anti-theft system.
Where is the PCM located on my 2000 GMC Yukon?
On most GMT400 and early GMT800 trucks and SUVs like the 1999-2000 Yukon, the PCM is located in the engine compartment, typically on the driver’s side fender well or near the battery.
Will this fix my transmission shifting problems?
If the PCM is the cause of the shifting issues, then yes. The PCM controls transmission line pressure and shift solenoids. A failing module can cause harsh or incorrect shifts even if the transmission itself is mechanically sound.