Is your Chevrolet, GMC, or Isuzu truck or van suffering from perplexing issues like a persistent check engine light, erratic shifting, poor fuel mileage, or even a no-start condition? The Powertrain Control Module (PCM), the central computer of your vehicle, is often the culprit. This vital component manages everything from fuel injection and ignition timing to transmission shift points. When it fails, it can cause a cascade of problems that are frustrating to diagnose. This replacement PCM is the definitive solution to restore your vehicle’s performance, reliability, and drivability.
This isn’t just a generic part off the shelf. We provide a fully programmed module specific to your vehicle. Upon purchase, you simply provide us with your vehicle’s VIN, and our technicians will flash the unit with the latest, most stable software updates directly from GM. This ensures that your new PCM communicates flawlessly with all other modules in your vehicle, correcting factory bugs and optimizing performance from the moment you install it. It’s a true plug-and-play solution designed to get you back on the road with confidence.
Symptoms of a Failing GM Powertrain Control Module
- ✔ Persistent Check Engine Light that won’t clear or returns immediately.
- ✔ Engine stumbling, misfiring, or running rough.
- ✔ Unexplained drop in fuel economy.
- ✔ Harsh, delayed, or erratic automatic transmission shifting.
- ✔ Vehicle cranks but refuses to start (no-start condition).
- ✔ Loss of power or sluggish acceleration.
- ✔ Inability for diagnostic scan tools to communicate with the PCM.
Your Direct Replacement 1999-2000 Chevrolet 2500 PCM
Choosing this module means you’re getting a reliable, hassle-free repair. We take care of the most critical step—the programming. By flashing the module to your specific VIN, we ensure it has the correct calibration for your truck’s engine, transmission, and emissions equipment. This module is a direct replacement for multiple OEM part numbers, including 16263494, 16265035, and 8162634940, guaranteeing a perfect fit and function for a wide range of GM vehicles from 1998 to 2002, such as the Chevrolet Express, GMC Savana, S10, Blazer, Tahoe, and Yukon.
Installation is straightforward for a DIY mechanic or any professional technician. After disconnecting the battery, you’ll locate and swap the old module with this new one. Once installed and the battery is reconnected, you may need to perform a simple security relearn procedure (often called a CASE relearn), which can typically be done without special tools. This synchronizes the new PCM with your vehicle’s anti-theft system, and you’ll be ready to drive.
Frequently Asked Questions
What is a PCM and what does it do?
The Powertrain Control Module (PCM) is your vehicle’s main computer. It controls all aspects of the engine and transmission to ensure optimal performance, fuel efficiency, and low emissions. It’s often referred to as the ‘brain’ of the vehicle.
Do I need to do any programming myself?
No. This PCM comes fully programmed to your vehicle’s specific VIN before it is shipped. It arrives ready for installation, making it a true plug-and-play solution.
What is the VIN and why do you need it?
The VIN (Vehicle Identification Number) is a unique 17-digit code for your specific vehicle. We use it to load the exact factory software and calibrations for your engine, transmission, and options, ensuring perfect compatibility and performance.
Where is the PCM located on my truck or van?
On most compatible models like the Chevrolet 2500 Pickup, Tahoe, and Yukon, the PCM is located in the engine compartment, typically on the driver’s side near the battery or firewall. On Express and Savana vans, it’s often in the LH rear of the engine compartment. Always consult a repair manual for your specific model if you are unsure.
Will this fix my check engine light?
If the check engine light is caused by a faulty PCM, then yes, this part will resolve the issue. However, it’s crucial to ensure the codes are not being caused by other failing components like sensors or wiring. A proper diagnosis is always recommended.
Is a security relearn procedure required after installation?
Yes, most GM vehicles of this era require a security relearn procedure after the PCM is replaced. This syncs the new module with your vehicle’s anti-theft system. The procedure is simple and can usually be done in your driveway with just the ignition key. Instructions are widely available online or in service manuals.