Restore Peak Performance to Your GM Truck or Van
Is your Chevrolet Express, GMC Savana, or S10 Blazer running rough, shifting erratically, or refusing to start? A failing Powertrain Control Module (PCM) is often the culprit. This vital component is the central computer of your vehicle, managing everything from fuel injection and ignition timing to transmission shift points and emissions controls. When it fails, it can cause a cascade of frustrating and potentially damaging issues. This replacement PCM, part number 16265035, is the definitive solution to get your vehicle back on the road with reliability and confidence.
We take the guesswork and hassle out of the repair process. Unlike a generic module from a parts store, each unit is meticulously programmed to your vehicle’s specific Vehicle Identification Number (VIN). This ensures seamless communication with all other onboard modules and guarantees that your engine and transmission operate exactly as the manufacturer intended. We install the latest GM-certified software updates, which can resolve factory bugs and often improve performance and fuel efficiency over the original programming.
Is Your Express 1500 Van PCM Failing?
A faulty PCM can manifest in numerous ways, often mimicking other component failures. If you’re experiencing any of the following symptoms, your engine computer may be at the end of its service life. This module is the correct solution for these common problems.
- ✔ Check Engine Light is on with various communication or sensor codes (e.g., U-codes, P0601, P0606).
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Engine cranks but refuses to start.
- ✔ Unexplained stalling or stumbling while driving.
- ✔ Noticeable decrease in fuel economy.
- ✔ Failure to pass an emissions test.
- ✔ Intermittent electrical issues that seem to have no other cause.
The Plug-and-Play Solution
Our goal is to make your repair as simple as possible. By providing us with your VIN during checkout, you receive a module that is ready for installation. In most cases, the only additional step required is a security relearn procedure (often called Passlock or CASE relearn), which can typically be performed without special tools. This simple procedure syncs the new PCM with your vehicle’s anti-theft system. Once completed, you’ll have restored the brain of your vehicle, resolving those persistent drivability issues.
This module is a direct replacement for multiple part numbers, including 16263494, 16265035, and 8162634940, and fits a wide array of popular GM trucks and vans from 1998 to 2002. Please verify the extensive fitment list to confirm compatibility with your specific model and year.
Frequently Asked Questions
Do I need to send my old PCM (core) back?
No core charge or return is required for this part. You can keep your old module.
Is this module difficult to install?
Installation is straightforward for anyone with basic mechanical skills. The PCM is typically located in the engine bay. You will need to disconnect the battery, unplug the electrical connectors, and unbolt the module. After installing the new one, you may need to perform a security relearn procedure, which can be found online or in a service manual.
What is a security relearn procedure?
It’s a simple process that syncs the new PCM to your vehicle’s anti-theft system. For most of these GM vehicles, it involves turning the key to the ‘ON’ position for 10-15 minutes, then ‘OFF’, and repeating this cycle three times. This allows the vehicle to recognize and accept the new computer.
How do I provide my VIN?
After you complete your purchase, you will receive instructions on how to send us your vehicle’s 17-digit VIN. We cannot program and ship your module until we receive this information.
Will this fix my check engine light?
If the check engine light is caused by an internal failure of the PCM (like a P0601 code), then yes, this will resolve the issue. However, if the light is on due to a faulty sensor or other component, you will still need to repair that underlying problem.