Is Your GM Truck or Van Running Rough?
If your Chevrolet Express, GMC Savana, or other compatible GM vehicle is suffering from erratic behavior like stalling, poor fuel economy, shifting problems, or a persistent Check Engine Light, the culprit is often a failing Powertrain Control Module (PCM). As the central computer for your engine and transmission, the PCM’s health is critical for performance, reliability, and emissions compliance. When it starts to fail, it can cause a cascade of frustrating and difficult-to-diagnose issues, leaving you stranded or facing costly repair bills.
The Direct Solution for Your Vehicle’s Brain
This Powertrain Control Module, part number 16263494, is the definitive solution to restore your vehicle’s factory performance. We take the guesswork and hassle out of the replacement process. Unlike a generic module from a parts store or salvage yard, this unit is professionally programmed specifically for your vehicle before it ships. By providing us with your Vehicle Identification Number (VIN) at checkout, we flash the module with the latest, most stable software updates directly from General Motors. This ensures perfect communication between all vehicle systems, optimal engine parameters, and correct transmission shift points—just like it was on the showroom floor.
From the Diagnostic Bay
We had a 2001 Savana 3500 work van come into the shop that was driving the owner crazy. It would randomly stall at stoplights, but only when the engine was warm. There were no consistent trouble codes, just a history of random misfires. The owner had already replaced the plugs, wires, cap, rotor, and even the fuel pump. After hours of diagnostics, we hooked up a scope to the PCM outputs and found the injector driver for cylinder 3 was intermittently dropping out. A new, correctly programmed PCM solved the problem instantly. It’s a perfect example of how a failing module can mimic other component failures, making a direct-fit programmed unit the smartest repair.
Why Choose Our Programmed Express 2500 Van PCM?
Replacing a PCM isn’t just about swapping hardware. The software is equally important. Our service eliminates the need for an expensive trip to the dealership for programming. We handle the critical software flashing process, meaning you receive a part that is ready for installation. This is a crucial step that is often overlooked, leading to no-start conditions or compatibility issues with modules purchased elsewhere. This module is a direct replacement for multiple part numbers, including 16265035 and 8162634940, and fits a wide range of GM trucks and vans from 1998 to 2002.
Is Your GM Truck or Van Showing These Symptoms?
- ✔ Persistent and illuminated Check Engine Light (CEL)
- ✔ Engine stalling or cutting out unexpectedly
- ✔ Rough idling or hesitation during acceleration
- ✔ Noticeable decrease in fuel efficiency
- ✔ Harsh or erratic automatic transmission shifting
- ✔ Failure to pass state emissions testing
- ✔ Vehicle entering ‘limp mode’ with reduced power
- ✔ Complete no-start condition where the engine cranks but won’t fire
Simple Process, Professional Results
Our goal is to get you back on the road quickly. The process is straightforward: 1) Purchase this module. 2) Provide us with your vehicle’s 17-digit VIN. 3) We program the module with the correct GM calibration. 4) We ship the ready-to-install module to you. While the installation is typically plug-and-play, some vehicles may require a simple security relearn procedure (often called a CASE relearn), which can be done without special tools. Instructions for this procedure are widely available and easy to follow. By choosing our pre-programmed Express 2500 Van PCM, you are ensuring a reliable and accurate repair.
Frequently Asked Questions
Do I need to get this module programmed?
No. We handle all the programming for you before shipment. Simply provide your vehicle’s VIN during or after checkout, and we will flash the module with the latest GM software specific to your vehicle.
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 mixture, ignition timing, and emissions, as well as managing the automatic transmission’s shifting.
Is this part difficult to install?
Installation is generally straightforward. The module is typically located in the engine bay. You will need to disconnect the battery, unplug the electrical connectors from the old module, unbolt it, and then install the new one in the reverse order. Some vehicles may require a security relearn procedure after installation, which does not require special tools.
How do I find my VIN?
Your 17-digit Vehicle Identification Number (VIN) can be found on your vehicle’s registration, insurance card, or on a metal plate on the driver’s side of the dashboard, visible through the windshield.
Will this fit models other than the Express 2500 Van?
Yes. This PCM is compatible with a wide variety of GM trucks and vans from the 1998-2002 era, including the Chevy Silverado, GMC Sierra, Tahoe, Yukon, Astro, S10, and more. Please check the detailed fitment list on this page to confirm compatibility with your exact model.