Is Your GM Truck or Van Running Rough?
If you’re dealing with frustrating issues like a persistent check engine light, erratic engine behavior, poor fuel economy, or harsh transmission shifting, the root cause is often a failing Powertrain Control Module (PCM). As the central computer of your vehicle, the PCM is responsible for managing everything from the air-fuel mixture and ignition timing to transmission shift points and emissions controls. When it begins to fail, it can cause a cascade of problems that are difficult to diagnose and can leave your reliable workhorse stranded.
From the Diagnostic Bay
We had a 2001 Chevy Express 2500 towed in that had stumped two other shops. The complaint was a random no-start condition. Sometimes it would fire right up, other times the engine would just crank endlessly. There were no consistent trouble codes, just a few random communication errors that would come and go. After hours of checking wiring harnesses and sensors, we hooked up a scope to the injector control circuits. We found that during the no-start events, the PCM wasn’t grounding the injectors. The internal driver for the injector bank had an intermittent failure. We installed a VIN-programmed PCM, performed the security relearn, and the van fired up every single time. It’s a classic example of how a faulty module can create symptoms that mimic a dozen other problems.
Symptoms of a Failing Powertrain Control Module
- ✔ Check Engine Light is illuminated with various trouble codes (DTCs).
- ✔ Engine stalling, stumbling, or misfiring unexpectedly.
- ✔ Harsh or delayed transmission shifting.
- ✔ The vehicle won’t start, but the battery and starter are good.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Failure to pass state emissions testing.
- ✔ Communication errors with diagnostic scan tools.
The Direct-Fit Solution: A Programmed PCM 16263494
Don’t let a faulty computer keep your vehicle off the road. This Powertrain Control Module is the reliable and straightforward solution for a wide range of GM trucks and vans from the late 1990s and early 2000s. We take the guesswork out of the repair by pre-programming the module specifically for your vehicle. All you need to do is provide us with your Vehicle Identification Number (VIN) after your purchase. Our technicians will flash the unit with the latest, most stable software updates directly from GM. This ensures that your vehicle operates exactly as the manufacturer intended, restoring lost power, improving efficiency, and ensuring smooth operation.
This is not a generic, one-size-fits-all part. The VIN-specific programming configures the module for your vehicle’s exact engine, transmission, and emissions equipment. This process eliminates the need for expensive trips to the dealership for programming, saving you time and money. Once installed, you may need to perform a simple security relearn procedure (often called a CASE relearn), which can typically be done without special tools. Get your truck or van back to peak performance with a module that’s ready to work right out of the box.
Frequently Asked Questions
Do I need to send my old PCM in?
No, there is no core charge or need to return your original module. This is a direct purchase, which simplifies the process for you.
What is VIN programming?
VIN programming is the process of loading your vehicle’s specific software and calibration files onto the module. We use your Vehicle Identification Number (VIN) to access the correct GM software, ensuring the PCM is a perfect match for your engine, transmission, and options.
Is this part difficult to install?
The physical installation is typically straightforward, involving disconnecting the battery, unplugging the electrical connectors, and unbolting the old module. After installing the new one, you may need to perform a security relearn procedure. Instructions for this can often be found online or in a service manual for your specific vehicle.
How do I provide my VIN?
After you complete your purchase, simply send us a message with your 17-digit VIN. We cannot ship your part until we receive this information, as the programming is a critical step in the process.
Will this fix my vehicle’s problem?
While this PCM resolves issues caused by a faulty module, it’s important to ensure your vehicle has been properly diagnosed. This part will not fix problems related to other failed components like sensors, wiring, or mechanical parts. We recommend a thorough diagnosis by a qualified technician.