Is your trusty GM truck or van running rough, shifting erratically, or showing a persistent Check Engine Light? A failing Powertrain Control Module (PCM) is often the culprit, acting like a faulty brain for your vehicle’s most critical systems. Don’t let drivability issues sideline your workhorse. This direct-fit replacement PCM is the definitive solution, arriving at your door fully programmed with the latest GM software updates specifically for your vehicle’s VIN. Get back to reliable performance without the hassle or expense of a dealership visit.
Common Symptoms & Your Solution
If you’re experiencing any of the following, a failing computer is the likely cause. This module is designed to solve these exact problems:
- Erratic or harsh automatic transmission shifting
- Poor fuel economy and loss of power
- Engine stalling, stumbling, or refusing to start
- A steady or flashing Check Engine Light (CEL)
- Diagnostic Trouble Codes (DTCs) such as P0601, P0602, P0605, or P0606
- Failure to pass state emissions testing
By replacing your old unit with this professionally programmed 1999 Chevrolet 1500 PCM, you are restoring the central command center of your vehicle, ensuring all engine and transmission parameters are operating exactly as the factory intended.
Features & Tangible Benefits
- ✔ Programmed to Your VIN: No extra trips to the dealer. This module is a true plug-and-play solution, ready for installation right out of the box.
- ✔ Loaded with Latest GM Updates: We flash the unit with the most current factory software, which can correct earlier known issues and improve overall performance and efficiency.
- ✔ Restored Drivability: Enjoy smoother shifting, consistent engine performance, and optimized fuel mileage once again.
- ✔ Guaranteed Compatibility: This module is a direct replacement for multiple service numbers, including 16263494 and 8162634940, ensuring a perfect fit for the wide range of trucks and vans listed below.
- ✔ Cost-Effective Repair: Save hundreds of dollars compared to sourcing and programming a new module at a dealership.
Expert Insight: The End of Dealership Headaches
As a technician for over 20 years, I remember the days when replacing a PCM was a major ordeal. You’d install the new box, but the truck wouldn’t start because the security system hadn’t learned the new module. It meant towing the vehicle to a dealer and paying them an hour or two of labor just to program it. The beauty of this service is that it eliminates that entire step. By providing your VIN, you receive a module that’s already matched to your truck’s specific configuration. It simplifies a complex job into something a confident DIYer can handle in their own driveway, saving both time and money. This is how modern repairs should be: smart, simple, and effective.
This is more than just a replacement part; it’s a comprehensive solution to get your vehicle running properly again. Whether you have a work truck that needs to be dependable or a family SUV you rely on, installing a correctly programmed 1999 Chevrolet 1500 PCM provides the peace of mind you need. Take control of your repair and get your vehicle back to its peak operational state.
Frequently Asked Questions
How do I provide my Vehicle Identification Number (VIN)?
After you complete your purchase, you will need to send us your 17-digit VIN. We will provide clear instructions on how to do this. We cannot program or ship your module without it.
Is this really a plug-and-play installation?
Yes. Because we program the module to your specific VIN, it is ready to be installed upon arrival. In most cases, you simply disconnect the battery, swap the modules, and reconnect the battery. However, some GM vehicles of this era have a security system (VATS/Passlock) that may require a simple relearn procedure, which takes about 30 minutes and does not require any special tools. We include instructions for this common procedure.
Will this fix my check engine light?
If the check engine light is caused by an internal failure of the existing PCM (e.g., code P0601), this replacement module will solve the problem. However, if the light is on due to a faulty sensor or other component on the vehicle, you will still need to repair that underlying issue. This module corrects problems within the computer itself.
Is this compatible with my 2000 GMC Sierra?
This module fits a very wide range of GM trucks, vans, and SUVs. Please carefully review the detailed fitment list on this page. As long as your vehicle and original part number (like 16263494) are listed, this module is the correct replacement. The programming we perform makes it specific to your exact vehicle.
What is the difference between a PCM, ECM, and ECU?
The terms are often used interchangeably. ECU (Electronic Control Unit) is a general term. ECM (Engine Control Module) typically controls only engine functions. A PCM (Powertrain Control Module), like this unit for your 1999 Chevrolet 1500 PCM, is more integrated and controls both the engine and the transmission functions, which is standard for most of the vehicles this part fits.