Get Your Truck Back on the Road, Running Stronger Than Ever
Is your trusty 1999 GMC 1500 suddenly plagued with issues like a persistent check engine light, rough idling, poor fuel economy, or harsh shifting? A failing Powertrain Control Module (PCM) is often the culprit behind these frustrating and unpredictable problems. Don’t let a faulty computer sideline your workhorse. This fully programmed PCM is the definitive, hassle-free solution to restore your truck’s performance and reliability, getting you back on the road with confidence. We handle the complex programming for you; all you have to do is install it.
Common Symptoms of a Failing GM PCM & Your Solution
If your vehicle is experiencing any of the following, a faulty engine computer is the likely cause. This module is the direct fix for:
- Erratic or harsh transmission shifting
- Complete no-start or intermittent starting conditions
- Significant drop in fuel mileage
- Check Engine Light (CEL) with communication error codes or specific PCM failure codes like P0601, P0605, or P0606
- Engine stalling, sputtering, or misfiring (e.g., random P0300 codes)
- Failure to pass emissions testing
This isn’t just a replacement part; it’s a complete solution. We flash the module with the latest GM-certified software updates specifically for your truck’s Vehicle Identification Number (VIN). This ensures that once installed, your engine and transmission operate precisely as the manufacturer intended.
Features & Tangible Benefits
- ✔ Peak Performance & Efficiency: We load the latest GM software for your specific VIN, ensuring optimal fuel economy, smooth shifting, and correct engine parameters.
- ✔ Hassle-Free Installation: Arrives ready to install with no complicated dealership trips or special tools required. This is a true plug-and-play solution designed for the DIY mechanic or professional shop.
- ✔ Guaranteed Compatibility: By programming the module to your vehicle’s unique VIN, we eliminate all compatibility guesswork. This ensures every system in your truck communicates correctly from the moment you turn the key.
- ✔ Lasting Reliability: Each module undergoes rigorous inspection and testing to ensure it meets or exceeds original equipment standards, giving you a dependable, long-term fix for your vehicle.
- ✔ Cost-Effective Repair: Avoid the excessive costs and scheduling delays associated with dealership repairs. This provides a dealership-quality result at a fraction of the price.
An Expert’s Note on GM Security Systems: For vehicles of this era, the PCM is tied to the Passlock/Passkey security system. While this Programmed 1999 GMC 1500 PCM comes ready to go, your truck may need to perform a simple ‘Security Relearn’ procedure to sync the new module with your keys. This is a simple process you can do yourself in about 30 minutes—it just involves a few cycles of turning the key to the ‘ON’ position. No special tools are needed, and instructions are readily available. This simple step ensures your factory anti-theft system works perfectly with your new PCM.
Stop chasing phantom sensor codes and throwing parts at your truck. A faulty PCM can mimic many other problems, leading to wasted time and money. By replacing the brain of your engine management system, you’re addressing the root cause and restoring the dependable operation you rely on. This is the correct way to fix it, once and for all. Make the smart choice and get your GM truck or van running right again.
Frequently Asked Questions
What information do you need from me?
After you complete your purchase, you must provide us with your vehicle’s 17-digit VIN (Vehicle Identification Number). We cannot program and ship your module without it. The VIN ensures we load the exact correct software for your truck’s specific options and systems.
Is this part truly plug-and-play?
Yes, the module is programmed to your VIN and requires no further flashing. However, as with any PCM replacement on these GM vehicles, you may need to perform a simple ‘Security Relearn’ procedure, which involves cycling the ignition key. This takes about 30 minutes and does not require any special tools.
Will this fix my specific problem or Check Engine Light?
If your vehicle’s issues are caused by a faulty PCM, this part is the correct solution. It’s crucial to have the vehicle properly diagnosed. This module will resolve issues directly related to the computer itself, such as internal processor faults (P0601) or communication errors. After installation, be sure to clear all diagnostic trouble codes.
How is this better than a used part from a junkyard?
A used module from a junkyard is programmed to a different vehicle’s VIN and contains outdated software. This will cause compatibility issues, no-start conditions, and incorrect performance. Our modules are professionally inspected, cleaned, and loaded with the newest GM software specifically for YOUR vehicle, ensuring a perfect match and optimal operation.
Does this part have to match my original part number exactly?
Not always. GM often supersedes part numbers over the years. Our module, identified by part number 16263494 and its alternates, is the correct, updated hardware for the extensive list of compatible vehicles. As long as your vehicle is on the fitment list, this module will function correctly once programmed to your VIN.
Is any other work required after installation?
Aside from the potential security relearn, no other programming is needed. It is always a good practice to disconnect the battery during installation and to inspect and clean the main connector plugs for any corrosion or damage before connecting your new PCM.