Restore Peak Performance to Your GM Truck or Van
Is your 1999-2000 GMC Sierra, Chevrolet Silverado, or other compatible GM vehicle suffering from frustrating and unpredictable issues? A faulty Powertrain Control Module (PCM), the central computer of your vehicle, is often the hidden cause behind problems like a persistent Check Engine Light, rough idling, poor fuel economy, or even a no-start condition. This replacement PCM, part number 8162634940, is the definitive solution to restore your vehicle’s reliability and drivability.
The PCM is responsible for managing a complex web of sensors and systems, including fuel injection, ignition timing, transmission shifting, and emissions controls. When it begins to fail, the symptoms can be widespread and difficult to diagnose. You might replace sensors and other components only to find the problem persists. This module takes the guesswork out of the repair by addressing the root cause directly.
From the Diagnostic Bay
We had a 2000 Chevy Express van come into the shop with an intermittent stalling issue that no one could figure out. The owner had already spent a small fortune on a new fuel pump, ignition coil, and multiple sensors. The van would run fine for days, then suddenly die at a stoplight. After hooking up our diagnostic scanner and monitoring live data, we noticed the injector pulse width was dropping to zero right before the stall. This pointed directly to the PCM cutting fuel for no reason. We installed a VIN-programmed module just like this one, performed the security relearn, and the van has been running perfectly ever since. It’s a classic case of the vehicle’s ‘brain’ having a glitch that parts-swapping can’t fix.
Diagnosing Your 1999-2000 Sierra 1500 PCM
A failing computer can mimic many other mechanical problems, making it a frustrating component to diagnose. If you’re experiencing a combination of the following issues, there’s a strong probability your PCM is the culprit. This module is the reliable, plug-and-play fix you need.
Common Symptoms of a Failing PCM
- ✔ Unexplained Check Engine Light (CEL) illumination
- ✔ Engine stalling, stumbling, or misfiring
- ✔ Harsh or erratic automatic transmission shifting
- ✔ Noticeable decrease in fuel efficiency
- ✔ Failure to pass emissions testing
- ✔ Intermittent no-start or hard-starting conditions
- ✔ Communication errors with diagnostic scan tools
A True Plug-and-Play Solution
What sets this module apart is our professional programming service. Before we ship your part, we flash it with the latest official GM software updates specifically for your vehicle. All you have to do is provide us with your vehicle’s 17-digit VIN (Vehicle Identification Number) during or after checkout. This ensures perfect compatibility and function right out of the box, eliminating the need for an expensive trip to the dealership for programming. This module is a direct replacement for multiple part numbers, including 16263494, 16265035, and 218-11787, and fits a wide range of GM trucks and vans from the 1998-2002 era.
While the module is programmed for your vehicle, some GM models of this era may require a simple, key-on security relearn procedure or a Crankshaft Variation (CASE) relearn after installation. These procedures can often be done without special tools and are necessary to sync the new module with your vehicle’s anti-theft system and crankshaft position sensor.
Frequently Asked Questions
Do I need to program this module?
No. We handle all the programming for you before shipment. Simply provide your vehicle’s VIN when you order, and the module will arrive ready to be installed, flashed with the latest GM software for your specific vehicle.
What is a CASE relearn and will I need to do it?
A CASE (Crankshaft Angle Sensor Error) relearn is a procedure that synchronizes the new PCM with your engine’s crankshaft position sensor. Many GM vehicles require this after a PCM replacement to prevent a P1336 trouble code. A capable scan tool is typically required for this procedure.
Where is the PCM located on my 1999-2000 Sierra 1500?
On the 1999-2000 GMC Sierra and Chevrolet Silverado 1500, the PCM is typically located in the engine compartment on the driver’s side, under or near the battery tray.
How do I provide my VIN?
After you complete your purchase, you can send us a message with your 17-digit VIN. We cannot ship your order until we receive the VIN, as the programming is essential for the part to function correctly.
Is this a direct replacement for part number 16263494?
Yes, this module is a direct, compatible replacement for several part numbers, including 16263494, 16265035, 8162634940, and 218-11787. It covers a wide range of applications.