Is Your GM Truck or Van Running Rough?
If you’re dealing with a frustrating check engine light that won’t go away, erratic engine performance, or harsh transmission shifting, a failing Powertrain Control Module (PCM) is often the culprit. For the hard-working owner of a Silverado, Sierra, Express, or Savana, an unreliable vehicle isn’t just an annoyance—it’s a major problem that can cost you time and money. This isn’t just a replacement part; it’s the brain of your vehicle’s engine and transmission, restored to perfect working order and ready to get you back on the road with confidence.
Common Symptoms & Your Solution
A faulty PCM can manifest in numerous ways, often mimicking other component failures. If you’ve been chasing problems without success, it’s time to look at the source. This module is the definitive solution for:
- Unexplained Check Engine Lights (CEL)
- Engine stalling or rough idling
- Poor fuel economy
- Harsh or incorrect automatic transmission shifts
- No-start conditions where the engine cranks but won’t fire
- Communication error codes (DTCs starting with ‘U’)
- False sensor codes that return even after replacing the sensor
We solve this by providing a high-quality, dependable programmed GM 16263494 PCM that is flashed specifically to your vehicle’s unique Vehicle Identification Number (VIN). This ensures all factory settings, security protocols, and operational parameters are perfectly matched to your truck or van.
Features & Benefits
- ✔ VIN-Programmed for Your Vehicle: We flash the module with the latest GM software updates using your VIN. This eliminates the need for an expensive trip to the dealership for programming.
- ✔ Plug & Drive Installation: Once you receive the module, installation is straightforward. In most cases, you can simply disconnect the battery, swap the modules, and reconnect. No special tools required.
- ✔ Restored Drivability: Experience a smoother idle, responsive acceleration, and crisp, correct transmission shifts. Your vehicle will run like it’s supposed to.
- ✔ Cost-Effective Solution: Avoid the high costs of a new module and dealership labor. This is the most efficient way to solve complex electronic issues and get your vehicle running right.
- ✔ Broad Compatibility: This module is a direct replacement for multiple part numbers, including 16263494, 16265035, and 8162634940, covering a wide range of GM trucks, vans, and SUVs.
An Expert’s Note on GM Security Systems
Many of these late ’90s and early ’00s GM vehicles use a Passlock or VATS security system that is tied directly to the PCM. A generic, non-programmed module will not allow the vehicle to start because it can’t communicate with the security system. By programming the module to your specific VIN, we ensure these security handshakes are already in place, which is a critical step for a successful, hassle-free installation. This attention to detail is what separates a quick fix from a proper, lasting repair.
Getting your work truck or family SUV back in reliable condition is our top priority. This programmed GM 16263494 PCM is your direct path to solving those persistent electronic gremlins and restoring the dependable performance you rely on every day.
Frequently Asked Questions
How do I provide my VIN number?
After you complete your purchase, simply send us a message with your 17-digit Vehicle Identification Number (VIN). We cannot ship the module until we have this information to program it correctly for your vehicle.
Will I need to do anything else after I install it?
In most cases, no. Because the module comes programmed to your VIN, it is ready for immediate installation. For some vehicles, a Case Relearn Procedure (also known as Crankshaft Variation Relearn) may be needed to clear a P1336 code, which can be done with a capable scan tool.
Is this part compatible with my vehicle?
Please review the detailed fitment list provided in the description. This module fits a wide range of Chevrolet, GMC, and Isuzu models. The most important thing is to match your original part number to one of the compatible numbers listed (e.g., 16263494, 16265035). If you are unsure, please contact us with your VIN before ordering.
What is the difference between a PCM and an ECM?
ECM (Engine Control Module) and PCM (Powertrain Control Module) are often used interchangeably. Technically, an ECM controls only the engine, while a PCM controls both the engine and the transmission. For the vehicles this part fits, it is a PCM as it manages both systems.
Why is a programmed module better than a used one from a junkyard?
A used module from another vehicle will have the incorrect VIN and software, which can cause compatibility issues, no-start problems due to security mismatches, and incorrect transmission operation. Our programmed GM 16263494 PCM ensures a perfect match with the latest software for reliable, long-term performance.