Restore Your Hummer’s Performance and Reliability
If your 2010 Hummer H3 is suddenly stalling, struggling to start, or showing a ‘Reduced Engine Power’ message, the problem often points directly to a failing Fuel System Control Module (FSCM). As a technician with over two decades of experience, I’ve seen countless drivers replace the entire fuel pump, only to find the issue persists. The FSCM is the brain of your fuel delivery system, and when it fails, it starves your engine of the fuel it needs to run properly. This isn’t just an inconvenience; it can be a serious safety issue.
This is your direct-fit, permanent solution. We offer a genuine GM Fuel System Control Module, part number 20877116, that comes fully programmed to your vehicle’s specific VIN. Forget about costly dealership visits for programming or towing your vehicle to a shop. We handle the complex part for you. Simply provide your VIN at checkout, and we’ll flash the module with the latest GM software updates before it even leaves our facility. This ensures perfect communication between the FSCM and your vehicle’s main computer (ECM), restoring factory performance and efficiency.
A Technician’s Notebook: The Misleading Fuel Pump
I remember a 2010 Sierra 1500 that came into the bay on a tow truck. The owner had already spent a weekend replacing the in-tank fuel pump himself, a tough job. His complaint? Still a ‘crank, no-start’ condition. He was frustrated and out a few hundred dollars. A quick scan showed DTC U0109 – ‘Lost Communication with Fuel Pump Control Module.’ We checked the power and ground at the FSCM connector on the frame rail—it was getting everything it needed. The module itself, exposed to years of road salt and moisture, had failed internally. We installed a VIN-programmed FSCM, and the truck fired up on the first try. It’s a classic case where diagnosing the *control* system saves you from replacing a perfectly good pump.
Is Your Vehicle Showing These Symptoms?
A faulty FSCM can manifest in several ways. If you’re experiencing any of the following, this module is the likely culprit:
- ✔ Engine cranks but will not start.
- ✔ Vehicle stalls unexpectedly, especially under load or when warm.
- ✔ Hesitation or stumbling during acceleration.
- ✔ “Reduced Engine Power” warning light is on.
- ✔ Check Engine Light with diagnostic trouble codes (DTCs) such as P069E, P0230, or U0109.
- ✔ Inconsistent fuel pressure readings.
A Straightforward Guide to Installation
Installing your new 2010 Hummer H3 FSCM is a job most DIYers can handle in their own driveway. Since we’ve pre-programmed it, no special scan tools are required for the setup.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate the Module: On the 2010 Hummer H3, the FSCM is typically mounted on the rear frame crossmember, making it relatively easy to access without lifting the vehicle significantly.
- Disconnect and Remove: Carefully unplug the electrical connectors. Note their orientation. Then, unbolt the old module from the frame. These bolts can sometimes be rusty, so a little penetrating oil can help.
- Install the New Module: Bolt the new, pre-programmed FSCM into the same location. Ensure it is mounted securely.
- Reconnect and Finalize: Plug the electrical connectors firmly into the new module. Reconnect your vehicle’s battery terminal.
- Cycle the Key: Turn the ignition key to the ‘On’ position (without starting the engine) for 10-15 seconds to allow the system to prime. Start your engine and check for proper operation.
Verified Vehicle Compatibility
This module is a direct replacement for part numbers 20791901, 20827745, 20877116, and 20850927. It fits a wide range of GM vehicles. Please verify your model and year from the list below:
CADILLAC CTS 2010-2012 (LH rear compartment)
CADILLAC ESCALADE, ESV, EXT 2010-2012 (LH frame rail)
CHEVROLET AVALANCHE 1500 2010-2012 (LH frame rail)
CHEVROLET CAPTIVA SPORT 2012 (LH rear compartment)
CHEVROLET COLORADO 2010-2012 (rear center frame)
CHEVROLET EXPRESS 1500 VAN 2010-2012 (LH frame rail)
CHEVROLET IMPALA 2012 (RH rear quarter panel)
CHEVROLET SILVERADO 1500 PICKUP 2010-2012 (LH frame rail)
CHEVROLET SUBURBAN 1500 2010-2012 (LH frame rail)
CHEVROLET TAHOE 2010-2012 (LH frame rail)
CHEVROLET TRAVERSE 2010-2012 (rear crossmember)
GMC ACADIA 2010-2012 (rear crossmember)
GMC CANYON 2010-2012 (rear center frame)
GMC SAVANA 1500 VAN 2010-2012 (LH frame rail)
GMC SIERRA 1500 & DENALI 1500 2010-2012 (LH frame rail)
GMC YUKON & YUKON XL 1500 2010-2012 (LH frame rail)
BUICK ENCLAVE 2010-2012 (rear crossmember)
BUICK LACROSSE 2010-2012 (RH rear trunk)
BUICK REGAL 2011-2012 (LH rear quarter interior)
SATURN OUTLOOK 2010 (Fuel Pump)
SATURN VUE 2010 (RH rear engine compartment)
…and more. Please use the compatibility tool or contact us with your VIN to confirm.
Frequently Asked Questions
Why do I need to provide my VIN?
Your Vehicle Identification Number (VIN) allows us to program the module with the exact software calibration your vehicle requires from the factory. This ensures seamless integration and prevents compatibility issues that cause driveability problems or warning lights.
Is this part difficult to install myself?
For most DIYers with basic hand tools, this is a straightforward installation. The module is typically located on the vehicle’s frame rail or crossmember. Since we handle the programming, the physical swap is all that’s required.
Will this fix a P069E error code?
Yes, the DTC P069E (Fuel Pump Control Module Requested MIL Illumination) is one of the most common codes indicating a failed FSCM. Replacing the module with this pre-programmed unit is the correct repair for this code.
What is the difference between the FSCM and the fuel pump?
The fuel pump is the mechanical part inside your gas tank that moves fuel. The FSCM is the electronic ‘brain’ that tells the fuel pump how fast to run based on engine demand. The pump can be fine, but if the FSCM fails, the pump won’t get the correct commands.
Is this a new or used part?
This is a high-quality, inspected, and tested original equipment (OE) part that has been professionally programmed with the latest software for your vehicle, ensuring reliability and perfect function.