Is Your Trusty GM Truck Running Out of Ideas?
If your late-90s GMC or Chevy truck, van, or SUV is suffering from baffling issues like stalling, erratic shifting, a persistent check engine light, or a complete no-start condition, the problem might be deeper than a simple sensor. The Powertrain Control Module (PCM) is the brain of your vehicle’s engine and transmission, and when it fails, it can cause a host of frustrating problems. This replacement PCM is the definitive solution to restore the reliable performance you depend on, getting you back on the road and back to work with confidence.
Common Symptoms & Your Solution
A failing engine computer can mimic many other mechanical issues, leading to expensive and time-consuming diagnostic guesswork. If you’re experiencing any of the following, this pre-programmed module is your answer:
- No-Start or Intermittent Stalling: The engine cranks but refuses to start, or stalls unexpectedly.
- Harsh or Incorrect Shifting: Your automatic transmission may shift erratically, slam into gear, or get stuck in one gear (limp mode).
- Check Engine Light with PCM-related Codes: Diagnostic Trouble Codes (DTCs) such as P0601, P0602, P0605, or other internal controller errors.
- Poor Fuel Economy and Performance: A noticeable drop in MPG and sluggish acceleration.
- Communication Errors: Your scan tool is unable to communicate with the PCM.
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We program this module specifically to your vehicle’s VIN, ensuring it has the latest GM software updates for optimal function. For anyone needing a reliable 1999 GMC 1500 PCM 16250279, this is the most direct path to a lasting repair.
Features & Benefits
- โ VIN-Specific Programming: Arrives flashed to your exact vehicle identification number. This critical step ensures seamless communication with your truck’s other modules for a true plug-and-play installation.
- โ Latest GM Software Updates: Programmed with the newest stable software from General Motors, often improving on the original factory calibration for better performance and efficiency.
- โ Direct OEM Replacement: Engineered to match the form, fit, and function of the original part numbers 16250279, 09366810, and 09355699, guaranteeing a hassle-free swap.
- โ Solves Complex Electrical Issues: The definitive fix for frustrating electronic gremlins that don’t respond to replacing individual sensors or ignition components.
- โ Broad Vehicle Compatibility: A single, reliable solution for a wide range of popular GM workhorses from 1998-1999, including the Sierra, Silverado, Suburban, Tahoe, Express, and Savana.
- โ Purchase Protection: This unit is backed by our one-year replacement warranty.
From the Technician’s Bench: I’ve spent countless hours under the hoods of these GMT400-platform trucks. A classic mistake is to chase symptoms by replacing expensive fuel pumps, ignition control modules, and sensors when the root cause is a failing PCM. After 20+ years of heat cycles and vibration, the internal circuits on the original computer simply wear out. A tell-tale sign is often a cluster of unrelated error codes or a scan tool that can’t connect. Installing this properly programmed 1999 GMC 1500 PCM 16250279 not only fixes the problem but restores the vehicle’s core operational logic, making it run like it should.
Frequently Asked Questions
Do I need to do any programming myself?
No. This PCM arrives at your door fully programmed to the VIN you provide. The only additional step required is a simple security relearn procedure that you can do yourself in about 10-15 minutes with just your key. Instructions are included.
Where is the PCM located on my truck?
On most compatible models like the GMC Sierra, Chevy Silverado, Tahoe, and Suburban, the PCM is located in the engine bay on the driver’s side, near the battery and fender well. It is a silver metal box with multiple large electrical connectors.
What is the security relearn procedure?
This is a simple process to sync the new PCM with your vehicle’s anti-theft system (VATS/Passlock). It typically involves turning the key to the ‘ON’ position for 10 minutes, then ‘OFF’, and repeating the cycle two more times. This allows the components to recognize each other. No special tools are required.
How do I provide my VIN?
After you complete your purchase, you will receive an email with simple instructions on how to reply with your vehicle’s 17-digit VIN. We cannot ship your part until we receive this information, as the programming is essential.
Will this fix my check engine light?
If the check engine light is on due to an internal failure of your old PCM (e.g., codes P0601-P0606), then this part is the correct solution. If the light is caused by a separate faulty sensor or mechanical issue, that component will still need to be addressed.
Is this compatible with other part numbers?
Yes, this PCM is a direct replacement for service numbers 16250279, 09366810, and 09355699. Please check the included fitment list to confirm compatibility with your specific vehicle model and year.