Is your Chevrolet Astro, Express Van, Silverado, or GMC Sierra suffering from perplexing engine issues? Symptoms like erratic idling, stalling, poor fuel mileage, or harsh transmission shifts often point to a single culprit: a failing Powertrain Control Module (PCM). As the central computer of your vehicle, the PCM is responsible for managing everything from fuel injection and ignition timing to transmission shift points. When it begins to fail, the entire vehicle’s performance and reliability are compromised.
This replacement Powertrain Control Module is the definitive solution to get your truck or van back on the road and running smoothly. It is a direct-fit replacement for a wide range of GM vehicles, specifically designed to replace OEM part numbers 16263494, 16265035, and 8162634940. The best part? This isn’t just a part in a box. We professionally program the module to your vehicle’s specific Vehicle Identification Number (VIN) before it ships. This ensures that it arrives with the latest GM software updates and is ready for a simple, plug-and-play installation, saving you from a costly and time-consuming trip to the dealership for programming.
From the Diagnostic Bay
We recently had a 2000 Chevy Silverado 1500 with the 4.3L V6 towed in. The customer complained of a no-start condition that happened out of the blue. The engine would crank but never fire. Our initial checks showed fuel pressure and spark were present, but the injector pulse was non-existent. The scan tool couldn’t communicate with the ECM. After confirming all power and ground circuits to the module were intact, we diagnosed a failed PCM. Instead of a costly dealer part and programming, we installed one of these VIN-programmed units. After a quick security relearn procedure, the truck fired right up and ran like new. This part saved the customer significant time and money.
Symptoms of a Failing GM PCM 16263494
- ✔ Check Engine Light: The check engine light is illuminated, often with communication error codes or internal module failure codes (like P0601 or P0606).
- ✔ Engine Performance Issues: You may experience stalling, rough idling, hesitation during acceleration, or a noticeable decrease in power and fuel economy.
- ✔ Transmission Problems: The PCM also controls the transmission, so a failure can lead to harsh, erratic, or delayed shifting.
- ✔ No-Start Condition: In severe cases, a complete PCM failure can prevent the engine from starting at all, even though it cranks over.
- ✔ Failed Emissions Test: An improperly functioning PCM will prevent your vehicle from passing a smog or emissions inspection.
Your Plug-and-Play Solution
Don’t let a faulty computer keep your reliable GM vehicle down. By ordering this module, you are getting a dependable part that is professionally prepared for your exact vehicle. Simply provide us with your VIN during or after checkout, and our technicians will flash the module with the correct software for your truck or van’s specific configuration. The process is simple, straightforward, and designed to get you back to work with minimal downtime. Restore the performance and reliability of your vehicle today with this pre-programmed GM PCM 16263494 replacement.
Frequently Asked Questions
What is a PCM and what does it do?
The Powertrain Control Module (PCM), often called the Engine Control Module (ECM), is your vehicle’s main computer. It controls all aspects of engine and transmission operation to ensure optimal performance, fuel efficiency, and emissions.
Do I need to get this module programmed?
No. This module comes pre-programmed to your vehicle’s VIN. We handle the programming before we ship the part, so it’s ready to install right out of the box. This saves you a trip to the dealership.
What information do you need from me?
After you place your order, you will need to provide us with your vehicle’s 17-digit VIN. This allows us to load the exact software and calibrations for your specific make, model, and engine.
Will this fix my check engine light?
If the check engine light is on due to a faulty PCM (e.g., internal error codes), then replacing it with this unit should resolve the issue. However, if the light is on for another reason (like a bad sensor), you will still need to fix that underlying problem.
Is any additional setup required after installation?
In many cases, you may need to perform a security relearn procedure, also known as a CASE relearn or Passlock relearn. This is a simple process that can typically be done without special tools and involves a sequence of key turns. Instructions are widely available online for your specific model.
How do I find my part number to confirm compatibility?
You can find the part number on a sticker on your original module. This part is a direct replacement for service numbers 16263494 and 16265035, among others listed in the fitment data. Matching this number ensures a perfect fit.