Restore Your Vehicle’s Fuel Delivery and Reliability
If your 2010-2012 Buick LaCrosse is experiencing frustrating issues like engine stalling, rough idling, extended cranking times, or a complete no-start condition, a failing Fuel System Control Module (FSCM) is a very likely culprit. Over my 20+ years in automotive diagnostics, I’ve seen these modules cause intermittent problems that can be a real headache to pinpoint. The FSCM is the brain that tells your fuel pump how much pressure to deliver. When it starts to fail, it can starve your engine of fuel, leading to poor performance and leaving you stranded.
Don’t let a faulty module dictate your car’s reliability. This is a direct-replacement Fuel System Control Module that solves these common issues. The best part? We take care of the most difficult step for you. Each module is professionally programmed with the latest GM software updates specifically for your vehicle’s VIN before it ships. This means you can skip the expensive trip to the dealership and the hassle of finding a shop with the right programming equipment. It arrives at your door ready for a straightforward, plug-and-play installation.
From the Diagnostic Bay: The Ghost in the Machine
I remember a 2011 Buick LaCrosse that came into my shop with a classic ghost problem. The owner said it would randomly stall at red lights, but then start right back up. He’d already replaced the fuel pump, thinking that was the issue, but the stalling continued. We hooked up the scan tool and saw a stored history code, P069E – Fuel Pump Control Module Requested MIL Illumination, but no active codes. While monitoring live data, we saw the fuel pressure command from the FSCM was dropping out intermittently. It was a classic case of a failing module getting heat-soaked and temporarily malfunctioning. We installed a VIN-programmed FSCM, and the problem was solved permanently. The customer was relieved to finally have a reliable car again, and it reinforced how critical this small part is to the entire fuel system.
Is Your LaCrosse Showing These Signs?
A failing FSCM can manifest in several ways. If you’re noticing any of the following, it’s time to inspect your module. This is the permanent fix for these common symptoms and diagnostic trouble codes (DTCs).
- âś” Engine cranks but will not start
- âś” Stalling, especially when the engine is warm
- âś” Hesitation or stumbling during acceleration
- âś” Reduced engine power and poor fuel economy
- âś” Check Engine Light with codes like P069E, U0109, P0230, or P025A
A Straightforward Guide to Installation
Installing your new 2010-2012 LaCrosse FSCM is a job most DIYers can handle with basic tools. In the LaCrosse, the module is conveniently located in the trunk.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Access the Module: Open the trunk and lift the floor covering. You may need to remove the right-hand trunk trim panel to gain access to the module’s location.
- Locate the FSCM: The module is a small, silver box mounted to the vehicle body, typically on the right side.
- Disconnect and Remove: Carefully unplug the electrical connectors. Then, unbolt the module from its mounting bracket. Note the orientation for the new part.
- Install the New Module: Bolt the new, pre-programmed FSCM into place. Reconnect the electrical connectors, ensuring they click securely into place.
- Final Steps: Re-install any trim panels you removed and reconnect the negative battery terminal. Your installation is complete! The vehicle is ready to start with no further programming needed.
Verified Vehicle Compatibility
This module is a guaranteed fit for a wide range of General Motors vehicles. While this listing is focused on the 2010-2012 Buick LaCrosse, it is also compatible with the models listed below. It directly replaces part numbers 20791901, 20827745, 20877116, and 20850927.
AVALANCHE 1500 10-12 (LH frame rail)
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 10-12 (LH frame rail)
ESCALADE ESV 10-12 (LH frame rail)
ESCALADE EXT 10-12 (LH frame rail)
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 PICKUP 10-12 (LH frame rail)
SIERRA DENALI 1500 11-12 (LH frame rail)
SILVERADO 1500 PICKUP 10-12 (LH frame rail)
SUBURBAN 1500 10-12 (LH frame rail)
TAHOE 10-12 (LH frame rail)
TRAVERSE 10-12 (rear crossmember)
VUE 10 (RH rear engine compartment)
YUKON 10-12 (LH frame rail)
YUKON XL 1500 10-12 (LH frame rail)
Frequently Asked Questions
Do I need to do any programming after I receive this module?
No. This FSCM is fully programmed to your vehicle’s specific VIN before we ship it. It is a true plug-and-play solution, saving you a trip to the dealer.
How do I provide my VIN?
After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). We cannot ship the part until we receive the VIN to perform the programming.
Is this part compatible with other part numbers?
Yes, this module is a direct replacement for several part numbers, including 20791901, 20827745, 20877116, and 20850927.
What tools are required for installation on a Buick LaCrosse?
For a 2010-2012 LaCrosse, you will typically only need basic hand tools, such as a socket set to remove the module’s mounting bolts and potentially a trim removal tool for the trunk paneling.
My car cranks but won’t start. Could this be the problem?
Yes, a ‘crank no-start’ condition is one of the most common symptoms of a completely failed Fuel System Control Module. The module fails to activate the fuel pump, so no fuel reaches the engine.