Restore Your Hummer’s Performance and Reliability
Is your 2010 Hummer H3 experiencing frustrating and unpredictable issues like stalling, hesitation on acceleration, or a complete no-start condition? Before you condemn the fuel pump, the real culprit is often the Fuel System Control Module (FSCM). This critical component regulates the power to your fuel pump, and when it fails, it can leave you stranded. This isn’t just an inconvenience; it’s a safety concern. We offer a direct, reliable solution: a Fuel System Control Module, pre-programmed specifically for your vehicle.
Case Study: A Tricky Diagnosis
I remember a 2010 H3 that came into my shop a few years back. The owner had already replaced the fuel pump himself, but the truck still had an intermittent stall, especially on hot days. He was frustrated and out of ideas. His scanner showed a U0109 (Lost Communication With Fuel Pump Control Module) code. Instead of guessing, we went straight to the FSCM located on the rear frame. It was showing signs of corrosion from road salt and moisture. We installed a new, properly programmed module, and the problem was solved instantly. It’s a classic case where throwing the most obvious part at the problem isn’t the solution; understanding the system is key.
Is Your Hummer H3 Showing These Signs of FSCM Failure?
A failing FSCM can mimic other fuel system problems. If you’re experiencing any of the following, this module is the likely solution. Pay close attention to diagnostic trouble codes (DTCs), as they often point directly to this part.
- ✔ Engine cranks but will not start
- ✔ Stalling, especially when the engine is warm or under load
- ✔ Severe hesitation or sputtering during acceleration
- ✔ Reduced engine power and poor fuel economy
- ✔ Check Engine Light with codes like P069E, P0230, or U0109
The Smart Solution: Pre-Programmed and Ready for Installation
The biggest challenge when replacing a modern electronic module is the need for expensive, dealer-specific programming. Our service eliminates that roadblock. When you purchase this 2010 Hummer H3 FSCM, we use the VIN you provide to flash the module with the latest, most stable software from GM. This ensures it communicates perfectly with your vehicle’s other computers, like the ECM, right out of the box. You get a part that performs correctly from the moment you plug it in, saving you a costly trip to the dealership and hours of diagnostic headaches. This is the most efficient way to get your H3 running right again.
A Straightforward Guide to Installation
Replacing the FSCM on your Hummer H3 is a manageable job for a DIY enthusiast with basic tools. The module is typically mounted to the vehicle’s frame, making it accessible without removing major components.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the Module: On the 2010 Hummer H3, the FSCM is mounted on the rear frame rail. You may need to safely lift and support the vehicle to gain comfortable access.
- Disconnect Electrical Connectors: Carefully press the release tabs on the two electrical connectors and pull them straight off the module. Inspect the connectors for any corrosion or damage.
- Remove the Old Module: The FSCM is held in place by two bolts. Use the appropriate socket to remove them and take the old module off the frame.
- Install the New Module: Mount your new, pre-programmed FSCM onto the frame and tighten the bolts securely.
- Reconnect Everything: Plug the electrical connectors back into the new module until they click into place. Reconnect the negative battery terminal. The installation of your 2010 Hummer H3 FSCM is now complete.
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 confirm your vehicle is on this list before ordering.
ACADIA 10-12 Fuel Pump; (rear crossmember)
AVALANCHE 1500 10-12
CANYON 10-12 Fuel Pump; (rear center frame)
CAPTIVA SPORT 12 Fuel Pump; (LH rear compartment)
COLORADO 10-12 Fuel Pump; (rear center frame)
CTS 10-12 Fuel Pump; (LH rear compartment)
ENCLAVE 10-12 Fuel Pump; (rear crossmember)
ESCALADE 10-12
ESCALADE ESV 10-12
ESCALADE EXT 10-12
EXPRESS 1500 VAN 10-12 Fuel Pump; (LH frame rail)
IMPALA 12 Fuel Pump; (RH rear quarter panel)
LACROSSE 10-12
OUTLOOK 10 Fuel Pump
REGAL 11-12 Fuel Pump; (LH rear quarter interior)
SAVANA 1500 VAN 10-12 Fuel Pump; (LH frame rail)
SIERRA 1500 PICKUP 10-12
SIERRA DENALI 1500 11-12
SILVERADO 1500 PICKUP 10-12
SUBURBAN 1500 10-12
TAHOE 10-12
TRAVERSE 10-12 Fuel Pump; (rear crossmember)
VUE 10 Fuel Pump; (RH rear engine compartment)
YUKON 10-12
YUKON XL 1500 10-12
Frequently Asked Questions
What exactly does the Fuel System Control Module (FSCM) do?
The FSCM acts as a smart controller for your fuel pump. Instead of the pump running at full speed all the time, the FSCM receives commands from the Engine Control Module (ECM) and adjusts the voltage to the pump. This provides precise fuel pressure for better efficiency and performance.
Why is it critical that I provide my VIN?
Your vehicle’s VIN is like its fingerprint. We use it to load the exact GM-specified software and calibrations for your Hummer H3’s engine, transmission, and emissions equipment. This step is essential for the module to function correctly and prevents compatibility issues.
Can I install this module myself?
Yes, absolutely. Because we handle the programming, the physical installation is a straightforward unbolt-and-bolt-on process. It’s a very common repair for DIYers with basic mechanical skills and tools. Just follow our guide above.
Will this fix a Check Engine Light with code P069E?
In the vast majority of cases, yes. DTC P069E (Fuel Pump Control Module Commanded OFF) is a very strong indicator that the FSCM itself has failed. Replacing it with this pre-programmed unit is the direct and proper repair for that code.
What happens if I install a module from a junkyard without programming?
It’s very unlikely to work correctly. An FSCM from another vehicle is programmed for that vehicle’s specific VIN and options. Installing it in your H3 will almost certainly cause a no-start condition, set communication error codes, and will not solve your original problem.
Are the other part numbers listed (20827745, 20877116, 20850927) interchangeable?
Yes. Those part numbers are all superseded by or are compatible with this module, 20791901. We supply the correct hardware, and our VIN programming ensures it works for any of the applications covered by those numbers.