Restore Peak Performance to Your GM Truck or Van
Is your Chevrolet or GMC vehicle suffering from a mysterious check engine light, erratic shifting, a no-start condition, or poor fuel economy? The Powertrain Control Module (PCM), often called the Engine Control Module (ECM), is the central computer responsible for managing your engine and transmission. When it fails, it can cause a wide array of frustrating and difficult-to-diagnose problems. This direct-fit replacement PCM is the definitive solution to get your vehicle running reliably again.
Unlike generic modules from a salvage yard, this unit is professionally programmed specifically for your vehicle. We use your Vehicle Identification Number (VIN) to load the latest, most stable software updates directly from GM. This ensures perfect compatibility and can even resolve underlying drivability issues that were present from the factory. The result is a seamless installation process that restores your vehicle’s original performance, efficiency, and dependability.
From the Diagnostic Bay
We had a 1999 Chevy Silverado 1500 in the shop with a persistent P0300 (Random Misfire) code that no amount of new plugs, wires, or ignition components could fix. The engine idled rough and lacked power under load. After confirming all mechanical and ignition systems were healthy, we suspected the PCM. The original module’s injector drivers were failing intermittently. Installing a VIN-programmed PCM like this one not only fixed the misfire instantly but also improved the transmission’s shift quality, thanks to the updated GM software that was loaded onto it.
Symptoms of a Failing Powertrain Control Module
- ✔ Persistent Check Engine Light (CEL) with various trouble codes
- ✔ Engine cranks but will not start
- ✔ Rough or unstable idle
- ✔ Noticeable decrease in fuel efficiency
- ✔ Harsh or erratic automatic transmission shifting
- ✔ Engine stalling or cutting out unexpectedly
- ✔ Failure to pass emissions testing
- ✔ No communication with diagnostic scan tools
The Solution: A VIN-Programmed GM 16263494 PCM
Don’t settle for a used part with unknown history or an incorrect calibration. Our process guarantees you receive a module that is a perfect match for your vehicle’s specific configuration. By providing your VIN upon purchase, you are ensuring that all factory settings for the engine, transmission, emissions equipment, and security system are correctly configured. This plug-and-play approach minimizes installation headaches and eliminates the need for an expensive trip to the dealership for programming. Simply install the module, perform the straightforward security relearn procedure if required, and get back on the road with confidence.
This module is a direct replacement for multiple GM part numbers, including 16263494, 16265035, and 8162634940, and fits a wide range of popular GM trucks and vans from the late 1990s and early 2000s, such as the S10/Sonoma, Silverado/Sierra, Express/Savana, Tahoe/Yukon, and more. Please verify the part number on your original module and consult the detailed fitment list to confirm compatibility.
Frequently Asked Questions
What is a PCM and what does it do?
The Powertrain Control Module (PCM) is your vehicle’s main computer. It controls critical functions of the engine and transmission, such as fuel injection, ignition timing, emissions systems, and automatic gear shifting, to ensure optimal performance, fuel economy, and low emissions.
How do I provide my VIN for programming?
After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). You can typically find this on your vehicle’s registration, insurance card, or on a plate on the driver’s side dashboard visible through the windshield.
Do I need to do anything after installing this module?
In many cases, you will need to perform a simple security relearn procedure (also known as a VATS relearn) to sync the new PCM with your vehicle’s anti-theft system. This procedure does not require special tools and typically involves a sequence of turning the ignition key. Some vehicles may also benefit from a Crankshaft Position (CASE) relearn, which may require a capable scan tool.
Is this module compatible with my vehicle?
This PCM is compatible with a wide range of GM vehicles that use part number 16263494 or its alternates. Please review the detailed compatibility list on this page and match the part number from your original module to ensure a perfect fit.
What happens if I don’t provide a VIN?
We cannot ship the module until we receive your VIN. Programming the PCM with your vehicle’s specific VIN is essential for it to function correctly. It ensures all systems, from the engine size to the transmission type, are properly calibrated.