Restore Peak Performance to Your GM Truck or Van
Is your 1998-1999 GMC 2500, Chevrolet Pickup, or Suburban suffering from perplexing issues like a persistent check engine light, erratic shifting, poor fuel economy, or a no-start condition? These are classic signs of a failing Powertrain Control Module (PCM), the electronic brain of your vehicle. This replacement PCM, part number 16250279, is the definitive solution to restore your vehicle’s factory performance, reliability, and drivability. It serves as the central command for your engine and transmission, and when it falters, the entire vehicle suffers.
We take the complexity out of the replacement process. Unlike a generic module from a parts store or salvage yard, this unit is specifically programmed for your vehicle before it ships. Upon purchase, simply provide us with your vehicle’s VIN. Our technicians will then flash the module with the latest GM-certified software and calibrations specific to your truck’s engine, transmission, and options. This ensures a seamless, plug-and-play installation with no need for an expensive trip to the dealership for programming.
From the Diagnostic Bay
We had a 1999 Chevy K2500 come into the shop with a complaint of intermittent stalling and hard starting, especially when warm. The owner had already replaced the fuel pump, ignition coil, and crank sensor with no luck. The check engine light was on, but the codes were all over the place—misfires, O2 sensor faults, and communication errors. After hours of chasing wires, we hooked up a scope to the PCM’s main power and ground circuits. We found that the 5-volt reference signal, which powers most of the engine sensors, was dropping out intermittently. This pointed directly to an internal failure in the original PCM. We installed one of our VIN-programmed modules, and the truck fired right up and ran perfectly. It’s a great reminder that when you have multiple, unrelated codes, the central computer is often the culprit.
Diagnosing Your 1998-1999 GMC 2500 PCM
A failing PCM can manifest in numerous ways, often mimicking other component failures. If you’re experiencing any of the following symptoms, a faulty engine computer could be the root cause. This module is the correct solution for a wide range of GM trucks and vans from that era, including the Chevrolet 1500, 2500, 3500 pickups, Tahoe, Suburban, and Express/Savana vans.
Common Symptoms of a Failing PCM
- ✔ Persistent Check Engine Light (CEL) with various, often inconsistent, trouble codes.
- ✔ Engine stumbling, misfiring, or running rough.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Failure to start or intermittent starting problems.
- ✔ A noticeable decrease in fuel efficiency.
- ✔ Failure to pass state emissions testing.
- ✔ Loss of communication with diagnostic scan tools.
This module is a direct replacement for several part numbers, including 16250279, 09366810, and 09355699. By matching one of these numbers from your original unit, you can be confident in a perfect fit and function. Our VIN-programming service ensures that all vehicle-specific parameters are correctly loaded, making installation straightforward for any competent DIY mechanic or professional technician.
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 engine performance, including fuel injection, ignition timing, and emissions systems, as well as managing the automatic transmission’s shifting patterns for optimal performance and fuel economy.
Do I need to program this module after I receive it?
No. This PCM comes fully programmed to your vehicle’s specific VIN. We handle all the flashing and software updates before shipping, so it arrives ready for a plug-and-play installation.
What information do you need from me?
After you place your order, we will need your vehicle’s 17-digit Vehicle Identification Number (VIN). This allows us to load the exact software and calibrations your truck or van requires.
Where is the PCM located on a 1998-1999 GMC 2500?
On most compatible full-size trucks and SUVs like the GMC 2500, Yukon, and Tahoe, the PCM is located in the engine compartment on the driver’s side (LH), often near the battery or on the inner fender.
Will this fix my check engine light?
If the check engine light and associated codes are being caused by a faulty PCM, then yes, this replacement part will solve the issue. However, it’s important to ensure that other potential problems (like faulty sensors or wiring) have been ruled out.
Is this compatible with other part numbers?
Yes, this module is a direct replacement for part numbers 16250279, 09366810, and 09355699. Please verify the part number on your original unit to ensure compatibility.