Is Your 1999-2000 Tahoe Experiencing Engine Problems?
If your Chevrolet Tahoe, or another compatible GM truck or van, is suffering from a persistent check engine light, erratic engine behavior, poor fuel mileage, or even a no-start condition, a failing Powertrain Control Module (PCM) is a likely culprit. As the central computer for your engine and transmission, the PCM is responsible for managing everything from fuel injection and spark timing to transmission shift points. When it begins to fail, it can cause a wide range of frustrating and difficult-to-diagnose issues.
From the Diagnostic Bay
We had a 2000 Chevy Tahoe come into the shop that was driving the owner crazy. It would randomly stall at stoplights and had a harsh 1-2 shift that felt like being rear-ended. Multiple shops had replaced sensors without success. After hooking up our diagnostic tools, we noticed erratic data from the PCM. We sourced a replacement module, programmed it to the truck’s VIN, and performed the security relearn. The difference was immediate. The stalling vanished, the shifts were smooth, and the owner was thrilled to have his reliable truck back. It’s a classic case of a failing computer mimicking mechanical problems.
Common Symptoms of a Failing GM PCM
- ✔ Persistent Check Engine Light (CEL) that won’t clear or returns immediately.
- ✔ Engine stalling, stumbling, or running rough at idle.
- ✔ A noticeable decrease in fuel economy.
- ✔ Harsh, delayed, or erratic automatic transmission shifting.
- ✔ The engine cranks but refuses to start.
- ✔ Communication errors with diagnostic scan tools.
- ✔ Failure to pass state emissions testing.
A Simple, Programmed Solution: The 1999-2000 Tahoe PCM
Don’t let a faulty computer keep your truck off the road. This Powertrain Control Module is a direct-fit replacement for your original unit, solving these common issues and restoring your vehicle’s performance and reliability. The most significant benefit is that we handle the complex programming for you. Simply provide us with your vehicle’s 17-digit Vehicle Identification Number (VIN) after your purchase, and our technicians will flash the module with the latest official GM software specific to your truck’s configuration. This ensures all systems communicate correctly and your engine operates exactly as the manufacturer intended.
This process saves you a costly trip to the dealership and eliminates the need for specialized programming tools. Once you receive your pre-programmed 1999-2000 Tahoe PCM, installation is straightforward. In most cases, you will only need to perform a simple security relearn procedure (often called a ‘key-cycle relearn’), which can be done in your driveway with no special tools. This syncs the new module with your vehicle’s anti-theft system.
This module is a reliable solution for a wide range of GM trucks and vans from the late 90s and early 2000s, cross-referencing with part numbers 16263494, 16265035, and 8162634940. Restore the brain of your engine and get back on the road with confidence.
Frequently Asked Questions
Do I need to program this module?
No. We program the module to your vehicle’s specific VIN before shipping it to you. This ensures it works correctly with your engine, transmission, and options right out of the box.
Where do I provide my VIN?
After you complete your purchase, you will receive instructions on how to send us your 17-digit VIN. We cannot ship your part until we receive this information.
Is installation difficult?
Physical installation is typically simple, involving disconnecting the battery and swapping the old module for the new one. After installation, you must perform a security relearn procedure, which involves a series of key turns. Instructions are widely available online for this process.
Will this fix my check engine light?
If the check engine light and associated codes are caused by a faulty PCM, this replacement part will solve the issue. However, it’s essential to ensure that other components like sensors or wiring are not the root cause of the problem.
What if my original part number isn’t an exact match?
This module is compatible with several part numbers, including 16263494 and 16265035. As long as your vehicle’s year, make, and model are on our compatibility list, we will program the module to function correctly for your application.