Is Your GM Truck or Van Running Rough?
If your late 90s or early 2000s Chevrolet, GMC, or Isuzu is suffering from erratic engine behavior, poor fuel economy, a persistent check engine light, or transmission shifting problems, a failing Powertrain Control Module (PCM) is often the culprit. As the central computer for your vehicle, the PCM is responsible for managing everything from fuel injection and ignition timing to transmission shift points and emissions controls. When it fails, it can cause a wide range of frustrating and difficult-to-diagnose issues.
The Direct Solution for Your Vehicle’s Brain
This replacement Powertrain Control Module is the definitive solution to restore your vehicle’s performance and reliability. It is a direct-fit component for a wide range of GM trucks and vans, including the 1999-2000 Chevy 2500 PCM. The most critical part of the replacement process is the programming, and we handle that for you. Before we ship your module, we will flash it with the latest official GM software updates, specifically calibrated to your vehicle using the VIN you provide. This ensures that once you receive the part, it’s ready for a straightforward installation, eliminating the need for an expensive trip to the dealership for programming.
From the Diagnostic Bay
I once had a 2000 GMC Sierra in the shop with a complaint of intermittent stalling and harsh 1-2 shifts. The owner had already replaced the throttle position sensor and the mass airflow sensor with no improvement. The codes were intermittent and didn’t point to a single component. After checking all the wiring and grounds, we hooked up a scope to the PCM outputs. We found that the injector driver signals were dropping out randomly, causing the stall. A new, properly programmed PCM fixed all the issues instantly. It’s a reminder that when multiple, unrelated symptoms appear, the central computer is a primary suspect.
Common Symptoms of a Failing GM PCM
- ✔ Persistent Check Engine Light (CEL) with various trouble codes.
- ✔ Engine stalling, stumbling, or running rough.
- ✔ A noticeable decrease in fuel efficiency.
- ✔ Harsh, delayed, or incorrect automatic transmission shifts.
- ✔ Complete no-start condition where the engine cranks but won’t fire.
- ✔ Failure to pass state emissions testing.
- ✔ Loss of communication with diagnostic scan tools.
Guaranteed Compatibility and Performance
This module is a direct replacement for multiple OEM part numbers, including 16263494, 16265035, 8162634940, and 218-11787. By providing us with your vehicle’s VIN during checkout, you guarantee that the module you receive will be 100% compatible with your specific make, model, and engine configuration. Restore the precise engine management your vehicle had when it left the factory. Don’t let a faulty computer keep your reliable truck or van off the road. Order today and get your vehicle running right again.
Frequently Asked Questions
What is a PCM?
The Powertrain Control Module (PCM), often called an Electronic Control Module (ECM) or Engine Control Unit (ECU), is your vehicle’s main computer. It controls all aspects of the engine and transmission to ensure optimal performance, fuel economy, and emissions.
Do I need to program this module?
No. We program the module for you before it ships. Simply provide your vehicle’s 17-digit VIN when you place your order, and we will flash the unit with the correct, updated software for your specific vehicle, making it ready for installation.
Where is the PCM located on my vehicle?
On most compatible pickup trucks and SUVs like the Chevy 2500, Tahoe, and Sierra, the PCM is located in the engine compartment, typically on the driver’s side near the battery or firewall. On vans like the Express and Savana, it is usually found in the LH rear of the engine compartment.
Will this fix my check engine light?
If the check engine light is caused by an internal failure of the original PCM, then yes, this replacement part will resolve the issue. However, it is crucial to properly diagnose the vehicle first, as the light could be on for other reasons, such as a faulty sensor.
What is a VIN and why do you need it?
The Vehicle Identification Number (VIN) is a unique 17-digit code for your vehicle. We use it to access the exact factory software and calibration files required for your specific engine, transmission, and options, ensuring perfect compatibility and performance.
Is any other procedure needed after installation?
In many cases, the installation is plug-and-play. However, some GM vehicles of this era may require a security relearn procedure (often called Passlock or VATS relearn) to allow the vehicle to start. This procedure can typically be performed without special tools and instructions can be easily found online.