Restore Peak Performance to Your GM Truck or Van
Is your Chevrolet Savana, Express, Silverado, or GMC Sierra suffering from frustrating and hard-to-diagnose issues? A persistent check engine light, rough idling, stalling, or a sudden drop in fuel economy are often symptoms of a failing Powertrain Control Module (PCM). This vital component is the central computer for your engine and transmission, and when it falters, the entire vehicle’s performance suffers. Don’t let a faulty computer keep your reliable workhorse off the road. This replacement PCM is the definitive solution to restore your vehicle’s original drivability and efficiency.
The Brain of Your Operation
The PCM is responsible for managing dozens of critical functions in real-time. It takes data from sensors all over your vehicle—like the oxygen sensors, crankshaft position sensor, and mass air flow sensor—and uses that information to precisely control fuel injection, ignition timing, and transmission shift points. A healthy PCM ensures your engine runs cleanly, powerfully, and efficiently. When it begins to fail, it can send incorrect signals, leading to a cascade of performance problems that can be mistaken for other faulty parts.
From the Diagnostic Bay
We had a 2001 Express 2500 van come in that had its owner chasing his tail for weeks. The van had a persistent lean code (P0171) and a rough idle. The owner had already replaced the MAF sensor, intake manifold gaskets, and all four oxygen sensors, but the problem remained. After hooking up our professional scan tool, we noticed the short-term fuel trim data was erratic and unresponsive. This pointed away from the sensors and toward the computer itself. We installed one of our VIN-programmed PCMs, performed the security relearn, and the van immediately idled smoothly. The fuel trims stabilized perfectly, and the lean code never returned. It was a classic case of a failing PCM driver circuit fooling the diagnostics.
Common Symptoms of a Failing PCM
If you’re experiencing any of the following issues, a faulty PCM could be the root cause. Replacing it can resolve complex problems that other repairs can’t seem to fix.
- ✔ Persistent Check Engine Light (CEL) with various codes
- ✔ Engine stalling or stumbling for no apparent reason
- ✔ Rough or erratic idling
- ✔ Noticeable decrease in fuel mileage
- ✔ Harsh or incorrect transmission shifting
- ✔ Failure to pass state emissions tests
- ✔ Intermittent no-start condition where the engine cranks but won’t fire
- ✔ Communication errors with diagnostic scan tools
Why Choose Our Programmed 1999-2002 Savana 2500 PCM?
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take the guesswork and high dealership costs out of the equation. When you order from us, we flash the module with the latest official GM software updates specific to your vehicle’s Vehicle Identification Number (VIN). This ensures perfect compatibility and optimal performance right out of the box. Your Savana 2500 PCM will arrive ready to manage your engine and transmission with the most refined and efficient programming available from the original manufacturer.
A Simple, Direct-Fit Solution
This module is designed to be a direct replacement for the original unit, matching all factory connections and mounting points. While the physical installation is straightforward, please note that on most GM vehicles of this era, a security relearn procedure (also known as a CASE learn) is required after installation. This procedure syncs the new PCM with your vehicle’s anti-theft system and crankshaft position sensor. This can often be performed without specialized tools and instructions are widely available online.
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. Restore the reliability and performance you depend on. Provide your VIN upon purchase and let us handle the programming for you.
Frequently Asked Questions
Do I need to do anything after installing this PCM?
Yes, after installation, you will need to perform a security relearn procedure (CASE learn). This syncs the new computer to your vehicle’s anti-theft system and crankshaft sensor. This procedure can typically be done without special tools.
How do I provide my VIN for programming?
You can add your vehicle’s 17-digit VIN in the notes section during checkout or send it to us in a message after you complete your purchase. We cannot ship the module until we have your VIN.
Will this fix my specific problem?
If your vehicle’s issues have been correctly diagnosed as a faulty PCM, this part is the solution. It will resolve problems directly caused by the computer, such as internal circuit failure, corrupted software, or driver malfunctions.
Is this a brand new part from GM?
This is a high-quality, fully tested replacement part that is guaranteed to meet or exceed original equipment specifications. It is loaded with new, official GM software specific to your vehicle.
Where is the PCM located on my 1999-2002 Savana Van?
On most Savana and Express vans from this period, the PCM is located in the engine compartment, typically on the driver’s side near the battery or mounted to the inner fender.