Is Your GM Truck or Van Running Rough?
If you’re dealing with a persistent check engine light, erratic engine behavior, poor fuel mileage, or transmission shifting problems in your late 90s or early 2000s GM vehicle, the root cause might be a failing Powertrain Control Module (PCM). The PCM is the central computer of your vehicle, responsible for managing everything from fuel injection and ignition timing to transmission shift points and emissions controls. When it starts to fail, it can create a cascade of confusing and frustrating symptoms that are often misdiagnosed.
This is a direct replacement for GM part number 16263494, solving these complex issues. We take the guesswork and high dealership costs out of the equation. Each module is professionally programmed with the latest official GM software updates, tailored specifically to your vehicle’s Vehicle Identification Number (VIN). This ensures seamless communication with your vehicle’s other systems and restores factory performance and reliability.
From the Diagnostic Bay
I once had a 2001 Savana van come in that the owner had spent a fortune on. He’d replaced the MAP sensor, the throttle position sensor, and even the entire fuel pump assembly trying to chase down a nasty hesitation and stalling issue. The codes were all over the place. After checking the wiring and confirming the new parts were good, we hooked up a scope to the PCM’s 5-volt reference circuit. Sure enough, the signal was noisy and unstable. We installed a VIN-programmed PCM, performed the security relearn, and the van ran like it just rolled off the assembly line. It’s a classic case of chasing symptoms when the brain itself is the problem.
Symptoms of a Failing Powertrain Control Module
- ✔ Persistent Check Engine Light (CEL) with various trouble codes.
- ✔ Engine stumbling, hesitating, or stalling unexpectedly.
- ✔ Rough or erratic idling.
- ✔ Noticeable decrease in fuel economy.
- ✔ Harsh or delayed automatic transmission shifting.
- ✔ Failure to pass state emissions inspections.
- ✔ Complete no-start condition where the engine cranks but won’t fire.
- ✔ Intermittent loss of communication with scan tools.
Why Choose Our Programmed GM PCM 16263494?
Getting a replacement computer for your vehicle isn’t as simple as buying one off the shelf. It must be a perfect match for your vehicle’s specific configuration. Our process makes it simple. When you order, you provide us with your VIN. We use that information to flash the module with the exact software your vehicle needs. This eliminates the need for an expensive trip to the dealership for programming. Your new GM PCM 16263494 arrives ready for installation, saving you time and money.
The Importance of VIN Programming
The VIN contains critical information about your vehicle, including the engine size, transmission type, emissions equipment, and other factory-installed options. Without correct programming, a replacement PCM will not function correctly, leading to performance issues or even preventing the vehicle from starting due to security system conflicts. Our VIN-programming service ensures that the replacement module is a true plug-and-play solution for your specific application.
Installation and Relearn Procedure
Installation is straightforward for anyone with basic mechanical skills. The module is typically located in the engine bay. Simply disconnect the battery, unplug the electrical connectors from the old module, unbolt it, and install the new one in its place. After installation, you will likely need to perform a security relearn procedure (often called a CASE relearn or Passlock relearn). This procedure syncs the new PCM with your vehicle’s anti-theft system and can usually be done without special tools. Instructions for this procedure are widely available online for your specific model.
This module is a reliable solution for a wide array of popular GM vehicles, including the Chevrolet Express, GMC Savana, Chevy Silverado, GMC Sierra, Tahoe, Yukon, and many more. By replacing your faulty GM PCM 16263494, you can restore your vehicle’s performance, efficiency, and dependability for years to come.
Frequently Asked Questions
Do I need to have this module programmed?
No. This module comes fully programmed to your vehicle’s VIN before it ships. Simply provide your VIN during or after checkout, and we handle the rest. It arrives ready to be installed.
Is this a simple plug-and-play installation?
For the most part, yes. You will install the module and reconnect the battery. However, on most GM vehicles of this era, you will need to perform a security relearn procedure to sync the new PCM with your vehicle’s anti-theft system. This process typically takes 10-30 minutes and does not require special scan tools.
Where do I find my vehicle’s VIN?
Your 17-digit 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 part fix my check engine light?
If the check engine light is caused by a faulty PCM, then yes, this part will resolve the issue. It is crucial to properly diagnose the vehicle to ensure the PCM is the source of the problem before ordering.
What happens if I forget to provide my VIN?
We cannot ship your order without a VIN, as the programming is essential for the part to function. Our team will contact you via email to request the VIN if it is not provided at the time of purchase. This may delay your order.