Restore Your GM Truck’s Performance and Reliability
Is your 1999-2000 Chevrolet Tahoe, Silverado, or other GM vehicle suffering from perplexing issues like a persistent check engine light, erratic shifting, poor fuel economy, or even a no-start condition? These are classic signs of a failing Powertrain Control Module (PCM), the central computer that manages your engine and transmission. A faulty PCM can disrupt critical functions, leaving you with an unreliable and inefficient vehicle. This replacement module is the definitive solution to restore your truck or van’s original performance and get you back on the road with confidence.
The Brain of Your Vehicle, Fully Programmed for You
This isn’t just a generic part off the shelf. We provide a comprehensive service that makes replacement simple. Upon purchase, you will provide us with your vehicle’s unique Vehicle Identification Number (VIN). Our technicians will then program the module with the latest official GM software calibration specific to your vehicle’s configuration. This crucial step ensures that the PCM communicates flawlessly with all other systems, from the fuel injectors to the transmission solenoids, delivering optimal engine performance, smooth shifting, and correct emissions control right out of the box.
From the Diagnostic Bay
We once had a 1999 Silverado in the shop that had its owner chasing ghosts for months. He had replaced the throttle position sensor, the mass airflow sensor, and even a couple of O2 sensors trying to fix a rough idle and stalling problem. The codes were intermittent and pointed everywhere. After checking the wiring and grounds, we finally suspected the PCM. A quick swap with a known-good, correctly programmed unit like this one solved everything instantly. It’s a powerful reminder that when multiple, seemingly unrelated electronic issues pop up, the root cause is often the central computer itself.
Common Symptoms of a Failing GM PCM
- ✔️ Persistent Check Engine Light (CEL) with various trouble codes.
- ✔️ Engine stalling, stumbling, or hesitating during acceleration.
- ✔️ Harsh, delayed, or erratic automatic transmission shifting.
- ✔️ A noticeable decrease in fuel efficiency.
- ✔️ Complete no-start or intermittent starting problems.
- ✔️ Failure to communicate with a diagnostic scan tool.
- ✔️ Unexplained loss of power.
Why Choose Our Programmed 1999-2000 Tahoe PCM?
This module is a direct replacement for OEM part number 16265035 and is also compatible with part numbers 16263494, 8162634940, 218-11787, and 21811787. It is designed to meet or exceed original equipment specifications for durability and performance. By programming it to your VIN, we eliminate the need for expensive dealership programming and complex setup procedures. For many vehicles, installation is a straightforward plug-and-play process, though some models may require a simple security relearn procedure (often called a CASE relearn) which can be done without special tools. This ensures your vehicle’s anti-theft system recognizes the new module. Getting a reliable, correctly programmed 1999-2000 Tahoe PCM is the most effective way to solve complex electronic issues and ensure your vehicle runs as the factory intended.
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’s operation, including fuel mixture, ignition timing, and emissions, while also managing the automatic transmission’s shifting for optimal performance and fuel economy.
How do I provide my VIN for programming?
After you complete your purchase, you can send us a message with your 17-digit VIN. We cannot ship the module until we receive this information, as the programming is essential for the part to function in your vehicle.
Will I need to do anything else after installing this module?
In many cases, it is a simple plug-and-play installation. However, some GM vehicles may require a security relearn or Crankshaft Variation (CASE) relearn procedure to sync the new PCM with your vehicle’s anti-theft system and crankshaft position sensor. This procedure can typically be performed without any special tools.
Is this a direct fit for my original part?
Yes, this is a direct-fit replacement for OEM part number 16265035 and is also a compatible replacement for part numbers 16263494, 8162634940, 218-11787, and 21811787. Please check the extensive fitment list to confirm compatibility with your specific vehicle model and year.
What causes a PCM to fail?
PCM failure can be caused by a variety of factors, including age, excessive heat, vibration, and electrical issues like voltage spikes or shorts in related wiring or sensors. Ensuring your vehicle’s battery and charging system are in good health can help prolong the life of the PCM.