Restore Your Truck’s Reliability with a VIN-Programmed Fuel Module
If your 2010-2012 Chevrolet Avalanche is experiencing frustrating issues like engine stalling, a no-start condition, or a persistent Check Engine Light, a failing Fuel System Control Module (FSCM) is a very common culprit. As a technician with over two decades of diagnostic experience, I’ve seen these modules cause headaches for countless owners. This isn’t just a part; it’s the solution to get your truck running dependably again, without the exorbitant costs and scheduling hassles of a dealership visit.
This FSCM, part number 20877116, is the brain behind your fuel pump. It precisely regulates the voltage sent to the pump, ensuring your engine gets the exact amount of fuel it needs under all conditions. When it fails, it can leave you stranded. We solve the biggest installation hurdle by programming this module specifically to your vehicle’s VIN before it ships. It arrives at your door loaded with the latest GM software updates, ready for a straightforward, plug-and-play installation.
Case Study: The Misdiagnosed Fuel Pump
A customer brought in an ’11 Sierra 1500 that would crank but not start after sitting overnight. He had already replaced the fuel pump himself, assuming it was the problem, but the issue remained. Hooking up my scan tool, I found no fuel pressure, but I also pulled a U0109 code—Lost Communication with Fuel Pump Control Module. Instead of just throwing another part at it, I checked the module’s location on the driver-side frame rail. The connector was corroded from years of exposure to road salt and moisture. This is a classic failure point I’ve seen on hundreds of these GM trucks. A new, properly programmed FSCM fixed the communication error and had the truck running perfectly in under 30 minutes. This pre-programmed module saves you from making that same costly misdiagnosis.
Is Your Truck Showing These Symptoms?
- âś” Engine cranks but will not start
- âś” Vehicle stalls unexpectedly, especially under load
- âś” Hesitation or stumbling during acceleration
- âś” Reduced engine power and poor fuel economy
- âś” Check Engine Light is illuminated
- âś” Common Diagnostic Trouble Codes (DTCs): P069E, U0109, P0230
A Straightforward Guide to Installation
- âś” Safety First: Disconnect the negative terminal from your vehicle’s battery.
- âś” Locate the Module: On most trucks like the 2010-2012 Avalanche FSCM, you’ll find it mounted to the inside of the driver-side frame rail, near the spare tire.
- âś” Disconnect and Remove: Carefully unplug the electrical connector. Then, remove the bolts or nuts securing the old module to the frame.
- âś” Install the New Module: Mount your new, pre-programmed FSCM in the same location and tighten the fasteners.
- âś” Connect and Finalize: Plug the electrical connector firmly into the new module until it clicks. Reconnect the negative battery terminal.
- âś” Cycle the Key: Turn the ignition key to the ‘On’ position (without starting) for 10 seconds to allow the system to initialize, then start your engine. The fix is complete!
Verified Vehicle Compatibility
This module is a direct replacement for part numbers 20791901, 20827745, 20877116, and 20850927. It fits a wide range of General Motors vehicles. Please verify your vehicle and options below to ensure proper fitment.
Frequently Asked Questions
Why do I need to provide my VIN?
Your VIN is essential for us to program the module with the correct, vehicle-specific software from GM. This ensures it communicates perfectly with your truck’s other computers, like the ECM and BCM, for a true plug-and-play installation.
Is this part difficult to install myself?
For most DIYers with basic hand tools, this is a very manageable repair. The module is typically in an accessible location on the frame rail. Since we handle the programming, you eliminate the most complex part of the job.
Will this fix a P069E code?
Yes, a P069E code (Fuel Pump Control Module Performance) is one of the most common indicators of a failing FSCM. While you should always confirm the diagnosis, this part is the direct solution for that code in most cases.
What happens if I install it without programming?
An unprogrammed module will not work. The vehicle will not recognize it, and it will likely result in a no-start condition and communication error codes. Our pre-programming service prevents this entirely.
Is this a new or used part?
This is a high-quality, tested, and verified genuine GM part, guaranteed to function correctly once programmed for your vehicle.