Restore Your Truck’s Brain, Restore Your Peace of Mind
Is your dependable GMC Sierra or Chevy Silverado suddenly acting up? Stalling, shifting hard, or refusing to start? A failing Powertrain Control Module (PCM) can feel like a mysterious, expensive problem. This isn’t just a component; it’s the central computer of your truck, and when it fails, it can cause a cascade of frustrating issues. We offer the definitive, hassle-free solution: a professionally programmed PCM, flashed with the latest GM software updates specifically for your vehicle’s VIN. Stop chasing symptoms and get the core problem fixed right the first time.
Common Symptoms of a Failing PCM & Your Direct-Fit Solution
If you’re experiencing any of the following, a faulty module is a likely culprit. This unit is the reliable fix for:
- Persistent Check Engine Light (CEL) with codes like P0601, P0602, P0605, or other communication errors.
- Poor or erratic automatic transmission shifting.
- Engine stalling, stumbling, or rough idling for no apparent reason.
- A complete no-start condition where the engine cranks but won’t fire up.
- Noticeable decrease in fuel economy.
- Communication issues with diagnostic scan tools.
This isn’t just a replacement part; it’s a complete, ready-to-install solution. By providing us with your VIN, you receive a module that is a perfect electronic match for your truck’s specific configuration, eliminating the need for an expensive trip to the dealership for programming. This is the most efficient way to get your 1999-2000 Sierra 1500 PCM replaced and your truck back to work.
Features & Benefits
- ✔ VIN-Specific Programming: We flash the module with your truck’s exact VIN and the latest GM software, ensuring perfect compatibility and optimal performance right out of the box.
- ✔ Plug & Play Installation: No dealership visit required. Once you perform the simple security relearn procedure (instructions included), you’re ready to go.
- ✔ Direct OEM Replacement: Engineered to meet or exceed original equipment specifications for part number 16263494 and its alternatives, guaranteeing a perfect fit and function.
- ✔ Thoroughly Inspected: Each module undergoes a comprehensive inspection process to ensure reliability and long-term durability, giving you confidence in your repair.
- ✔ Solves Complex Issues: Corrects a wide range of driveability problems, from fuel delivery and spark timing to transmission control, restoring your vehicle’s intended operation.
Expert Insight from the Garage
Over 20 years, I’ve seen countless technicians and DIYers waste hundreds of dollars and dozens of hours replacing perfectly good sensors, fuel pumps, and ignition components, all because they were chasing symptoms created by a failing PCM. On these late 90s/early 00s GM trucks, the PCM is notorious for creating ‘ghost’ problems. A failing module can send faulty signals that make you think your transmission is shot or your fuel injectors are clogged. Installing a correctly programmed 1999-2000 Sierra 1500 PCM is often the final piece of the puzzle that brings everything back to life, saving you from a world of diagnostic frustration.
This module is the correct electronic control unit for a wide range of GM vehicles from this era. Please verify your part number (16263494, 16265035, 8162634940) and check the detailed fitment list to ensure this is the correct 1999-2000 Sierra 1500 PCM for your application. After your purchase, we will contact you for your VIN to begin the programming process.
Frequently Asked Questions
Do I need to program this module after I receive it?
No. This module arrives pre-programmed to the VIN you provide. The only step required after installation is a simple security relearn procedure, which can be done without any special tools and typically takes about 10-15 minutes.
Where do I provide my vehicle’s VIN?
After you complete your purchase, you can send us a message with your 17-digit VIN, or we will reach out to you to request it. We cannot ship the module until we have programmed it, so providing the VIN promptly is essential.
Will this fix my check engine light?
If the check engine light is on due to an internal fault within the original PCM (such as error code P0601), this replacement unit is designed to correct that issue. However, if the light is on for another reason (e.g., a bad oxygen sensor or catalytic converter), this will not fix that separate problem.
What is the security relearn procedure?
For most compatible GM vehicles, it involves turning the key to the ‘ON’ position for 10 minutes, then ‘OFF’ for 10 seconds, and repeating this cycle three times. This allows your vehicle’s anti-theft system (VATS/Passlock) to recognize the new PCM. We include clear instructions with your order.
Is this compatible with other part numbers?
Yes, this module is a direct replacement for service numbers 16263494, 16265035, and 8162634940. Please check the fitment list to confirm compatibility with your specific make, model, and year.