Restore Power and Reliability to Your Hummer H3
Is your 2010 Hummer H3 experiencing frustrating issues like stalling, long crank times, or a complete no-start condition? Before you blame the fuel pump, the real culprit is often the Fuel System Control Module (FSCM). As a technician with over 20 years of experience, I’ve seen this exact scenario countless times. This module is the brain behind your fuel delivery, and when it fails, it leaves you stranded. This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take the hassle out of the repair by pre-programming this 2010 Hummer H3 Fuel Module to your vehicle’s specific VIN with the latest GM software updates. This means no expensive trip to the dealership for programming—just a straightforward installation to get you back on and off the road.
Is Your Hummer Showing These Symptoms?
A failing FSCM can mimic a bad fuel pump, but a proper diagnosis can save you hundreds. If you’re experiencing any of the following, this module is the likely solution.
- ✔ Sudden engine stalling, especially while driving
- ✔ Extended cranking before the engine will start
- ✔ Complete no-start condition where the engine turns over but won’t fire
- ✔ Engine hesitation or sputtering under acceleration
- ✔ “Service Fuel System” message on your instrument cluster
- ✔ Check Engine Light with diagnostic trouble codes (DTCs) such as P069E, P0230, or P2635
From the Diagnostic Bay: The Hidden Culprit
I remember a 2010 Sierra coming into the shop with a classic “no-start” complaint. The owner had already replaced the fuel pump himself, but the truck still wouldn’t fire. He was frustrated and out of money. After plugging in my scanner, I saw DTC P069E (Fuel Pump Control Module Commanded OFF). A quick check under the truck revealed the issue. The original FSCM, mounted to the frame rail, was heavily corroded from years of exposure to road salt and moisture. The internal electronics were shot. We installed one of our pre-programmed modules, and the truck fired up on the first try. This is a common failure point on these GM vehicles, including the Hummer H3, where the module is mounted on the rear frame and exposed to the elements.
A Straightforward Guide to Installation
Replacing the 2010 Hummer H3 Fuel Module is a job most DIYers can handle with basic tools. Because we program it for you, the process is truly plug-and-play.
- Safety First: Disconnect the negative terminal from your vehicle’s battery.
- Locate the Module: On the 2010 Hummer H3, the FSCM is typically mounted on the rear frame crossmember, near the spare tire.
- Disconnect and Remove: Carefully unplug the electrical connectors. Then, remove the bolts or nuts holding the module to the frame.
- Install the New Module: Mount the new, pre-programmed module in the same location and secure it with the original hardware.
- Reconnect: Plug the electrical connectors firmly into the new module. You should hear a click.
- Final Steps: Reconnect the negative battery terminal. Turn the key to the ‘ON’ position for 10 seconds (without starting) to allow the system to prime, then start your engine.
Verified Vehicle Compatibility
This module is a direct replacement for part numbers 20827745, 20791901, 20877116, and 20850927. Please verify your vehicle is on the list below. Note that for some models, you must match the ID number on your original part or specific vehicle options.
AVALANCHE 1500 10-12
CANYON 10-12 (rear center frame)
CAPTIVA SPORT 12 (LH rear compartment)
COLORADO 10-12 (rear center frame)
CTS 10-12 (LH rear compartment)
ENCLAVE 10-12 (rear crossmember)
ESCALADE & ESV & EXT 10-12
EXPRESS 1500 VAN 10-12 (LH frame rail)
HUMMER H3 10 (rear frame)
IMPALA 12 (RH rear quarter panel)
LACROSSE 10-12 (RH rear trunk)
OUTLOOK 10
REGAL 11-12 (LH rear quarter interior)
SAVANA 1500 VAN 10-12 (LH frame rail)
SIERRA 1500 & DENALI 1500 10-12
SILVERADO 1500 PICKUP 10-12
SUBURBAN 1500 10-12
TAHOE 10-12
TRAVERSE 10-12 (rear crossmember)
VUE 10 (RH rear engine compartment)
YUKON & YUKON XL 1500 10-12
What is a Fuel System Control Module (FSCM)?
2010 Hummer H3 Fuel Module
For most vehicles on the fitment list, including the , installation is straightforward. It typically involves disconnecting the battery, unplugging the old module, unbolting it from the frame, and installing the new one. No special tools are usually required.