Restore Your GM Truck’s Reliability and Performance
Is your trusty GM truck or van running rough, shifting erratically, or failing to start? A faulty Powertrain Control Module (PCM) is often the culprit, leaving you stranded and stressed. This is the heart of your vehicle’s engine management system, and when it fails, it can cause a host of frustrating problems. Get back on the road with confidence with this direct-fit, VIN-programmed engine computer, designed to restore the dependable performance you rely on for work and family.
Common Symptoms & Your Solution
If you’re experiencing any of the following issues, a failing PCM could be the cause. This module is the definitive solution for problems such as:
- Persistent Check Engine Light (CEL)
- Diagnostic Trouble Codes (DTCs) like P0601, P0605, or other internal module errors
- Poor or declining fuel economy
- Rough or unstable idling
- Engine stalling or hesitation during acceleration
- Harsh or erratic automatic transmission shifting
- Failure to pass state emissions testing
- Complete no-start condition where the engine cranks but won’t fire
By installing our pre-programmed unit, you’re not just buying a part; you’re getting a complete, hassle-free solution. We handle the complex programming, so you can handle the straightforward installation. This is the most efficient way to get your vehicle operating to factory specifications again. This 1999-2000 Sierra 1500 programmed PCM 16265035 is your reliable fix.
Features & Benefits
- ✔ VIN-Programmed for Your Vehicle: No need for expensive dealership trips or special tools. We flash the module with the latest GM-certified software using your vehicle’s specific VIN before it ships.
- ✔ Plug & Play Installation: Simply disconnect the battery, swap the old module with this one, and reconnect. In most cases, no complicated security or case relearn procedures are required.
- ✔ Restores Original Performance: Fixes common drivability issues, bringing back the smooth power, crisp shifting, and dependable operation you expect from your truck or van.
- ✔ Guaranteed Compatibility: This module is a direct replacement for multiple OEM part numbers, including 16265035, 16263494, 8162634940, and more, ensuring a perfect fit for a wide range of GM vehicles.
- ✔ Rigorously Inspected: Each unit undergoes extensive inspection and testing to ensure it meets or exceeds original equipment specifications for reliability and longevity.
An Expert’s Insight
As a technician with over 20 years of hands-on diagnostic experience, I’ve seen countless vehicles with persistent, hard-to-diagnose issues. Often, the problem isn’t a failed sensor but outdated software in the original PCM. By flashing every 1999-2000 Sierra 1500 programmed PCM 16265035 with the latest GM updates for your specific VIN, we’re not just replacing a part; we’re giving your vehicle’s brain the best possible information to run efficiently. This step alone can solve mysterious drivability problems that have plagued owners for years, saving you time, money, and headaches.
Frequently Asked Questions
How do I provide my VIN?
After you complete your purchase, simply send us a message with your 17-digit Vehicle Identification Number (VIN). We cannot program and ship your module without it. You can typically find your VIN on your vehicle’s dashboard (visible through the windshield), on the driver’s side door jamb sticker, or on your vehicle’s registration and insurance documents.
Is any additional programming required after installation?
In most cases, no. This PCM is programmed to be plug-and-play. However, on some specific models, a security relearn or Crankshaft Position Sensor (CASE) relearn may be necessary. These are simple procedures that can often be done without a scan tool, and we can provide instructions if needed.
Is this the correct part for my vehicle?
This module fits a wide range of GM trucks, vans, and SUVs. Please carefully review the compatibility list on this page. The most important step is to match your original part number to one of the numbers listed (e.g., 16265035, 16263494). If you are unsure, please contact us with your VIN, and we will be happy to verify fitment for you.
What if my original part number isn’t listed?
The part numbers provided (16263494, 16265035, 8162634940, etc.) are the most common compatible numbers. If your number is different, please contact us. GM often uses many different part numbers for the same component, and we can confirm if this module will work for your application.
Will this fix my check engine light?
If the check engine light is on due to an internal failure of your old PCM (like a P0601 code), this module will solve the problem. However, if the light is on because of a faulty sensor or another issue with the vehicle, you will still need to diagnose and repair that separate problem. Installing this 1999-2000 Sierra 1500 programmed PCM 16265035 is the critical first step to ensuring your vehicle’s computer is functioning correctly.