Is Your GM Truck or Van Running Rough? It Could Be the PCM.
If you’re dealing with frustrating issues like poor fuel economy, erratic shifting, a persistent check engine light, or even a no-start condition in your GMC Savana, Chevrolet Express, or other compatible GM vehicle, a failing Powertrain Control Module (PCM) is a very likely culprit. As the central computer of your vehicle, the PCM controls everything from fuel injection and ignition timing to transmission shift points and emissions systems. When it starts to fail, it can cause a cascade of problems that are often difficult to diagnose.
Don’t let a faulty computer keep your reliable workhorse off the road. This replacement Powertrain Control Module, corresponding to part number 16265035, is the definitive solution to restore your vehicle’s performance, reliability, and efficiency. We take the guesswork out of the repair by programming the module specifically for your vehicle using your VIN. This ensures that it arrives ready for installation with the latest GM software updates, making the process as seamless as possible.
From the Diagnostic Bay
We had a 2001 Chevy Express 2500 come into the shop with a complaint of intermittent stalling and a hard start when warm. The customer had already replaced the fuel pump and ignition control module with no luck. Scans showed a few random communication codes but nothing consistent. After checking all the wiring and grounds, we suspected the PCM. On a hunch, we used a heat gun on the module while the engine was running, and sure enough, it stalled and wouldn’t restart until it cooled down. A failing processor on the circuit board was the cause. We installed a VIN-programmed replacement like this one, performed the security relearn, and the van ran perfectly. It’s a classic example of how a failing PCM can mimic other component failures.
The Right Solution for Your Savana 1500 PCM
Choosing the correct PCM is critical for your vehicle’s operation. This module is a direct-fit replacement for a wide range of popular GM trucks and vans from the late 1990s and early 2000s. By providing us with your Vehicle Identification Number (VIN) during checkout, you guarantee that the module you receive is perfectly matched to your vehicle’s specific configuration, including engine size, transmission type, and emissions equipment. This eliminates compatibility issues and the need for expensive programming at a dealership.
Common Symptoms of a Failing PCM
- ✔ Check Engine Light: The most common indicator, often with codes related to module communication, sensor circuits, or processor faults.
- ✔ Engine Performance Issues: Stalling, rough idling, misfiring, hesitation during acceleration, and reduced power.
- ✔ Poor Fuel Economy: The engine may run too rich or too lean, drastically affecting your gas mileage.
- ✔ Transmission Problems: Harsh or delayed shifting, or getting stuck in one gear (limp mode).
- ✔ No-Start Condition: The PCM controls the fuel pump and ignition coils; if it fails, the engine may not start at all.
- ✔ Intermittent Electrical Problems: Gauges acting erratically or other electronic systems failing intermittently.
This unit is a reliable and cost-effective alternative to a costly dealership part. It is meticulously inspected to ensure functionality and is loaded with the most current software from General Motors to optimize performance. Installation is straightforward for a competent DIY mechanic or any professional technician. After installation, a simple security relearn procedure (often called a CASE relearn) may be required, which can typically be done without special tools. Restore your vehicle’s brain and get back on the road with confidence.
Frequently Asked Questions
Do I need to do anything after I purchase?
Yes. After you place your order, you must provide us with your vehicle’s 17-digit VIN. We cannot ship the module until we have this information, as we program it specifically for your truck or van.
Is this a plug-and-play module?
Mostly, yes. Because we program it to your VIN, it will have the correct software for your vehicle’s engine and transmission. However, on many GM vehicles of this era, you will need to perform a security relearn procedure so the PCM can communicate with your vehicle’s anti-theft system. This procedure can often be done without special tools and instructions are widely available online.
How do I know if this PCM will fit my vehicle?
This module replaces part number 16265035 and several others like 16263494. Please check the extensive fitment list on this page and verify the part number on your original module. Providing your VIN is the final step to guarantee compatibility.
What tools are needed for installation?
Basic hand tools, such as a socket set, are typically all that’s required to physically replace the module. The most important step is to disconnect the vehicle’s battery before you begin to prevent any electrical damage.
What if my original part number is not listed?
If your part number is not listed in the compatible numbers, this module may not be correct for your vehicle. Please contact us with your VIN and original part number, and our team of experts will help you find the exact part you need.