Is Your Truck or SUV Stalling, Hesitating, or Refusing to Start?
A failing Fuel System Control Module (FSCM) can be the source of some of the most frustrating and difficult-to-diagnose engine problems. If you’re experiencing sudden stalls, a long crank time before the engine fires, or a check engine light that just won’t go away, you’ve likely found the culprit. This isn’t just an inconvenience; it’s a reliability issue that can leave you stranded. This genuine GM 20791901 Fuel System Control Module is the definitive solution, arriving at your door pre-programmed for your specific vehicle, getting you back on the road with confidence.
Common Symptoms of a Failing FSCM & Your Solution
The FSCM is responsible for precisely managing the voltage sent to your fuel pump. When it fails, it can starve your engine of fuel, leading to a host of performance issues. Watch for these common warning signs:
- Engine cranks but will not start
- Vehicle starts and then immediately stalls
- Hesitation or stumbling under acceleration
- Rough idle or poor engine performance
- Check Engine Light with codes such as P069E, U0109, or P0230
Replacing the module is only half the battle. A new module must be programmed to your vehicle’s Vehicle Identification Number (VIN) to function correctly. We handle this critical step for you. By programming this 20791901 Fuel System Control Module before it ships, we eliminate the need for an expensive trip to the dealership, saving you time and money.
Features & Benefits
- ✔ Plug-and-Play Installation: Because we flash the module with the latest GM software using your VIN, it’s ready for installation right out of the box. No special tools or dealer visits required.
- ✔ Restored Engine Performance: A new, correctly programmed FSCM ensures your fuel pump receives the precise voltage it needs, restoring lost power, smoothing out your idle, and eliminating hesitation.
- ✔ Solve Pesky Check Engine Lights: This is the direct fix for common fuel system communication codes like U0109 and performance codes like P069E, allowing you to finally clear that light for good.
- ✔ OEM Quality & Fit: Built to GM’s exact specifications for a perfect fit and seamless integration with your vehicle’s electronics. This module is a direct replacement for part numbers 20791901, 20827745, 20877116, and 20850927.
- ✔ One-Year Protection: This unit is backed by our one-year replacement warranty, giving you confidence in your repair.
From the Technician’s Bench: We see these modules fail constantly, especially on trucks and SUVs. Their location on the frame rail exposes them to years of water, road salt, and vibration, which corrodes the circuit board. A common mistake is installing a new module without programming it, which simply won’t work. By providing a pre-flashed unit, we’re giving you the same solution a professional shop would, but without the high labor cost. It’s the smartest way to fix this common GM issue.
Don’t let a faulty module dictate when and where you can drive. Take control of your repair with this professionally programmed 20791901 Fuel System Control Module and restore the dependability you expect from your vehicle.
Frequently Asked Questions
Why do I need to provide my VIN?
Your vehicle’s VIN is required so we can program the module with the correct software and calibrations for your specific engine, transmission, and options. This ensures it communicates perfectly with your vehicle’s other computers, making it a true plug-and-play part.
Is this part difficult to install?
For most trucks and SUVs like the Tahoe or Silverado, the module is located on the driver’s side frame rail, making it accessible for a DIY-er with basic tools. Once the old module is unbolted and unplugged, this pre-programmed unit bolts right in its place. Since the programming is done, the most complex part of the job is already handled.
Will this fix my check engine light for code P069E?
Yes, in the vast majority of cases, a faulty FSCM is the root cause of a P069E trouble code (Fuel Pump Control Module Requested MIL Illumination). Replacing it with this correctly programmed module is the standard and effective repair.
What happens if I don’t program the module?
An unprogrammed Fuel System Control Module will not work. The vehicle will likely not start, and you will get communication error codes. Our pre-programming service completely eliminates this problem.
My original part number is 20877116. Will this work?
Yes. This module, 20791901, is a compatible replacement for several part numbers, including 20827745, 20877116, and 20850927. We will program it to function perfectly for your vehicle, regardless of which of these compatible part numbers you are replacing.