Restore Peak Performance to Your GM Truck or Van
Is your 1998-1999 GMC Savana, Chevy Express, or other GM truck experiencing frustrating issues like stalling, erratic shifting, a no-start condition, or a persistent Check Engine Light? These are classic symptoms of a failing Powertrain Control Module (PCM). As the central computer of your vehicle, the PCM is responsible for managing everything from fuel injection and ignition timing to transmission shifting and emissions control. When it fails, the entire vehicle’s performance and reliability are compromised.
This is a genuine, used OEM Powertrain Control Module, service number 16258815, that serves as a direct-fit replacement for a wide range of GM vehicles from this era. We take the guesswork out of the repair by programming the module specifically for your vehicle using your VIN. This critical step ensures that the PCM has the correct software and calibrations for your engine, transmission, and specific options, making installation as straightforward as possible.
From the Diagnostic Bay
We had a ’99 Suburban towed in that was a classic crank-no-start. The owner had already replaced the fuel pump, filter, and even the ignition coil, but it still wouldn’t fire up. After confirming spark and fuel pressure, we checked the injector pulse with a noid light – nothing. A quick scan showed no communication with the PCM. Tracing the wiring confirmed the PCM was getting power and ground, but it wasn’t commanding the fuel pump relay or the injectors. The internal drivers had failed. We installed a VIN-programmed PCM just like this one, performed the security relearn, and the truck fired up on the first try. It’s a common failure point that can easily be misdiagnosed as a fuel system problem.
Diagnosing a Faulty 1998-1999 Savana 2500 PCM
A failing engine computer can manifest in numerous ways, often mimicking other component failures. If you’re experiencing any of the following, your PCM could be the culprit. This module is the solution for correcting these common issues and restoring your vehicle’s factory operation.
- ✔ Check Engine Light: The light is on, and you may have codes related to internal module failure, sensor circuits (e.g., P0601, P0606), or communication errors (U-codes).
- ✔ No-Start or Hard Starting: The engine cranks but refuses to start, or takes an excessively long time to fire up, either hot or cold.
- ✔ Poor Engine Performance: Noticeable loss of power, hesitation on acceleration, rough idling, or random stalling.
- ✔ Reduced Fuel Economy: A sudden and unexplained drop in your vehicle’s gas mileage can be caused by incorrect fuel and air calculations from a faulty PCM.
- ✔ Erratic Transmission Shifting: The PCM controls shift points and line pressure in the transmission. Failure can lead to harsh shifts, delayed engagement, or getting stuck in one gear.
- ✔ Intermittent Issues: Problems that appear and disappear, often related to temperature changes, are a strong indicator of failing electronics within the module.
Plug-and-Play Solution with VIN Programming
Don’t settle for a generic computer that requires expensive dealer programming. We handle the critical software flashing for you. When you purchase this module, simply provide us with your vehicle’s 17-digit VIN. Our technicians will load the latest GM-certified software and calibrations directly onto the unit. This ensures it communicates perfectly with the other modules in your vehicle. While the unit is programmed for your vehicle, you may still need to perform a simple, key-on/key-off security relearn procedure (often called a Passlock or VATS relearn) after installation, which can typically be done in your driveway without special tools.
This module is a cost-effective and reliable way to get your truck or van back in service quickly. It is compatible with a vast range of models, including the Chevy C/K pickups, Suburban, Tahoe, Express, GMC Sierra, Yukon, Savana, and more. Please verify that your original module carries one of the compatible part numbers listed: 09355699, 16266645, 9355699, 16250279, 16258815, 09366810, or 9366810.
Frequently Asked Questions
Why do you need my VIN?
Your Vehicle Identification Number (VIN) allows us to program the PCM with the exact software and calibrations your specific vehicle requires. This includes information about the engine size, transmission type, emissions equipment, and other factory options, ensuring proper function and a seamless installation.
Is this a plug-and-play part?
Because we program it to your VIN, it is as close to plug-and-play as possible. In most cases, you will need to perform a security relearn procedure after installation, which involves a series of key cycles. This procedure pairs the new PCM to your vehicle’s anti-theft system and does not require a scanner.
Where is the PCM located on my 1999 Savana 2500?
On most GM vans and trucks from this era, the PCM (or ECM) is located in the engine compartment. On Savana and Express vans, it is typically on the left-hand (driver’s side) rear of the engine compartment. On pickups and SUVs, it is usually on the driver’s side inner fender, near the battery or fuse box.
Is this a new or used part?
This is a high-quality, tested, and fully functional used OEM part sourced from a salvaged vehicle. Each unit is inspected and then programmed with the latest software updates for your vehicle before being shipped.
Will this fix my transmission shifting problems?
In many cases, yes. The PCM directly controls the electronic functions of the transmission, including shift solenoids and line pressure. If your transmission problems are electronic in nature and stem from the computer, this replacement module should resolve them. However, it will not fix internal mechanical failures within the transmission itself.