Is Your GM Truck or Van Running Rough?
If your Chevrolet, GMC, or Isuzu is suffering from erratic behavior, poor fuel economy, or a persistent Check Engine Light, the culprit is often a failing Powertrain Control Module (PCM). As the central computer for your vehicle, the PCM manages everything from fuel injection and ignition timing to transmission shifting and emissions control. When it starts to fail, it can cause a cascade of frustrating and difficult-to-diagnose problems. This isn’t just an inconvenience; a faulty PCM can lead to decreased performance, failed emissions tests, and even leave you stranded.
Restore Peak Performance with a VIN-Programmed PCM
This replacement Powertrain Control Module is the definitive solution to get your vehicle back on the road and running like new. We take the guesswork out of the repair by pre-programming the module specifically for your vehicle using your VIN. This ensures that it arrives with the latest factory software updates from GM, providing optimal performance and compatibility right out of the box. No need for an expensive trip to the dealership for programming—this is a true plug-and-play solution designed for a straightforward installation.
From the Diagnostic Bay
I once had a 1999 Silverado in the shop with classic signs of a bad PCM: intermittent stalling, harsh shifting, and a check engine light that wouldn’t stay off. The owner had already replaced the throttle position sensor and MAF sensor with no luck. Before condemning the computer, I always check the basics. I found a corroded ground wire on the engine block, barely making contact. After cleaning the connection point and re-securing the ground, all the symptoms vanished. It’s a crucial reminder: before replacing a major component like a PCM, always verify that its power and ground connections are clean and secure. A 10-minute check can save you hundreds of dollars.
Common Symptoms of a Failing GM PCM 16263494
- ✔ Persistent Check Engine Light (CEL) with various trouble codes
- ✔ Engine stalling, stumbling, or misfiring
- ✔ Harsh or erratic automatic transmission shifting
- ✔ Noticeable decrease in fuel economy
- ✔ Failure to pass state emissions inspections
- ✔ Vehicle intermittently enters ‘limp mode’ with reduced power
- ✔ Complete no-start condition where the engine cranks but won’t fire
- ✔ Communication errors with diagnostic scan tools
Why Choose Our Pre-Programmed Module?
This isn’t just a replacement part; it’s a complete service. By providing us with your Vehicle Identification Number (VIN) at checkout, you ensure that the module you receive is perfectly matched to your vehicle’s specific configuration, including engine size, transmission type, and emissions equipment. This process eliminates compatibility issues and ensures all systems communicate correctly after installation. This module is a direct replacement for multiple part numbers, including 16263494, 16265035, and 8162634940, making it a versatile solution for a wide range of popular GM trucks and vans from the late 90s and early 2000s.
Frequently Asked Questions
Why do you need my VIN to program the module?
Your vehicle’s VIN (Vehicle Identification Number) allows us to access the exact factory calibration file for your specific truck or van. This includes information about the engine, transmission, tire size, gear ratio, and emissions systems. Programming the PCM with this specific file ensures seamless integration and optimal performance, just as it came from the factory.
Is any additional programming required after installation?
In most cases, this module is a plug-and-play solution. However, some GM vehicles of this era require a security relearn procedure (often called a CASE relearn or Passlock relearn) to synchronize the new PCM with your vehicle’s anti-theft system. This is a simple procedure that can typically be done without special tools and involves a sequence of key turns. Instructions are readily available online for specific models.
How can I be sure this is the correct part for my vehicle?
The best way to confirm compatibility is to match the part number from your original module to one of the numbers listed (16263494, 16265035, etc.). You can also use the extensive fitment list on this page to check your year, make, and model. If you are still unsure, please contact us with your VIN, and we will be happy to verify the fitment for you.
What happens if I continue to drive with a failing PCM?
Driving with a faulty PCM can lead to more severe issues. Poor engine management can cause damage to other components, such as the catalytic converter, due to an incorrect air/fuel mixture. It can also result in unpredictable stalling, which is a significant safety hazard. Addressing the issue promptly is crucial for the longevity and safety of your vehicle.
Where is the PCM located on my vehicle?
The location varies by model. On S10/Blazer/Jimmy platforms, it’s typically in the right-front of the engine compartment. On Express/Savana vans, it’s often in the left-rear of the engine compartment. For full-size pickups like the Silverado and Sierra, it’s usually found in the left-front of the engine bay, sometimes under the battery tray. Always disconnect the battery before attempting removal or installation.