Restore Your GM Truck’s Dependability
Is your trusty 1998 GMC Envoy, or another classic GM truck or van, suffering from baffling electrical problems, a stubborn check engine light, or unpredictable performance? A failing Powertrain Control Module (PCM), the vehicle’s brain, is a common cause for these frustrating issues. This professionally programmed engine computer is the definitive, hassle-free solution to get your vehicle back on the road, running smoothly and reliably. We eliminate the guesswork and expensive trips to the dealership by flashing this module with the latest official GM software, tailored specifically to your vehicle’s VIN before it ever leaves our facility.
Common Symptoms & Your Solution
If you’re experiencing any of the following, a faulty PCM is the likely culprit. This replacement module is designed to solve these problems:
- Persistent Check Engine Light (CEL) with codes like P0601, P0605, or other internal controller errors.
- Engine stalling, stumbling, or hesitating during acceleration.
- Rough or inconsistent idling.
- A complete no-start condition where the engine cranks but won’t fire.
- Poor fuel economy and loss of power.
- Erratic or harsh automatic transmission shifting.
- Communication errors with diagnostic scan tools.
Installing our pre-programmed 1998 GMC Envoy PCM is the most effective way to correct these issues and restore the factory performance you depend on.
Features & Tangible Benefits
- âś” Plug & Drive Installation: Arrives pre-programmed to your vehicle’s specific VIN. No further programming is required, saving you time and money.
- âś” Latest GM Software Updates: We flash the module with the most current calibrations from General Motors, ensuring optimal engine performance, fuel efficiency, and emissions control.
- âś” Guaranteed Compatibility: This is a direct-fit solution for a wide range of GM vehicles requiring part number 09355699, 16250279, or 09366810.
- âś” Restores Lost Power & Efficiency: By correcting engine and transmission commands, this module helps bring back the smooth operation and fuel economy your vehicle once had.
- âś” The Definitive Fix: Stop throwing money at sensors and other parts. A faulty PCM is an internal hardware failure that only a replacement module can fix.
- âś” Peace of Mind on the Road: This unit is backed by our one-year replacement warranty.
Expert Insight: The Work Truck That Wouldn’t Work
We recently helped a contractor whose ’99 Silverado 2500 work truck was randomly stalling at job sites. He’d replaced the fuel pump and crank sensor, but the intermittent problem persisted, costing him valuable time and credibility. A quick diagnostic revealed a P0601 internal controller error. We sent him a 1998 GMC Envoy PCM programmed to his truck’s VIN. He installed it in his driveway in under 30 minutes. The truck fired right up, idled perfectly, and the stalling issue was completely gone. He was back on the job the next day with a truck he could finally trust again.
Frequently Asked Questions
Do I need to do any programming myself?
No. This is the biggest benefit of our service. We program the module to the VIN you provide during checkout. It will arrive ready to install and start your vehicle. In some cases, a simple security relearn procedure may be necessary, which takes about 30 minutes and does not require any special tools.
How do I provide my VIN?
After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). We cannot ship the part until we receive this information, as the programming is specific to your vehicle.
Is this the correct part for my vehicle?
This module is a direct replacement for part numbers 09355699, 16250279, and 09366810. Please check the extensive fitment list on this page and verify the part number on your original module to ensure compatibility.
What if my truck has a security system like VATS or Passlock?
Our programming includes the necessary information to ensure the module works with your factory anti-theft system. For most vehicles of this era, a straightforward key-cycle relearn procedure is all that’s needed to sync the new PCM with your vehicle’s security system after installation.
What is the warranty on this part?
This unit is backed by our one-year replacement warranty, giving you confidence in your purchase.
Why should I buy this instead of one from a junkyard?
A used module from a junkyard will have the incorrect VIN and software for your vehicle, and it will not start your engine. Our units are professionally tested, cleaned, and programmed with the latest software for your specific vehicle, making it a reliable, plug-and-drive solution that a used part simply cannot be.