Restore Your Vehicle’s Fuel Delivery and Performance
There’s nothing more frustrating than an engine that cranks but won’t start, or one that stalls unexpectedly in traffic. These are classic signs of a fuel system problem, and after 20 years in the business, I’ve seen countless drivers mistakenly replace their fuel pump when the real issue was a failed Fuel System Control Module (FSCM). This module is the brain of your fuel delivery system, and when it falters, it can cause unpredictable and concerning symptoms. This isn’t just an inconvenience; it’s a reliability issue that needs a definitive solution.
This is the reliable, direct-fit solution for your 2010-2012 Buick Enclave and a wide range of other GM vehicles. The critical advantage here is that we program the module to your vehicle’s specific VIN before it ships. This means it arrives ready to install, loaded with the latest GM software updates, saving you a costly trip to the dealership and the hassle of finding a shop with the right programming equipment.
A Technician’s Notebook
I remember a 2011 Sierra 1500 that came into the shop on a tow truck. The owner was at his wit’s end. He’d already replaced the in-tank fuel pump assembly himself, but the truck still had a crank-no-start condition. He was convinced he got a bad pump. After hooking up my scan tool, I saw the tell-tale DTC: P069E – Fuel Pump Control Module Requested MIL Illumination. I checked for power at the FSCM connector, which was good, but there was no voltage being sent to the pump. The FSCM, located on the frame rail, had failed internally. We installed one of our pre-programmed modules, and the truck fired right up. It’s a classic case where diagnosing the controller first saved hundreds of dollars and hours of frustration.
Is Your Vehicle Showing These Symptoms?
A failing FSCM can manifest in several ways. If you’re experiencing any of the following, this module is the most likely solution.
- ✔ Engine cranks but will not start
- ✔ Stalling, especially under load or when coming to a stop
- ✔ Hesitation or stumbling during acceleration
- ✔ ‘Reduced Engine Power’ message on the dash
- ✔ Check Engine Light with diagnostic trouble codes (DTCs) such as P069E, U0109, P0230, or P2635
A Straightforward Guide to Installation
For the skilled DIYer or professional technician, replacing the FSCM is a manageable job. On the 2010-2012 Enclave, it’s typically located on the rear crossmember. Always consult a service manual for your specific vehicle’s location and torque specs.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate the Module: Find the old FSCM. On trucks and large SUVs, it’s often on the driver’s side frame rail. On crossovers like the Enclave, check the rear subframe/crossmember area. It’s a small silver box with electrical connectors.
- Disconnect and Remove: Carefully unplug the electrical connectors. Press the release tabs firmly. Then, unbolt the module from its mounting point. These bolts can be rusty, so a little penetrating oil can help.
- Install the New Module: Bolt the new, pre-programmed FSCM into place. Ensure it is securely fastened.
- Reconnect and Test: Plug the electrical connectors back in until they click, ensuring a secure connection. Reconnect the battery terminal. Cycle the key to the ‘On’ position for a few seconds to prime the system before starting the engine.
Verified Vehicle Compatibility
This module is a direct replacement for part numbers 20791901, 20827745, 20877116, and 20850927. It fits a wide array of GM vehicles. Please verify your model and year below. Note that location can vary.
Cadillac: CTS (10-12), Escalade / ESV / EXT (10-12)
Chevrolet: Avalanche 1500 (10-12), Captiva Sport (12), Colorado (10-12), Express 1500 Van (10-12), Impala (12), Silverado 1500 (10-12), Suburban 1500 (10-12), Tahoe (10-12), Traverse (10-12)
GMC: Acadia (10-12), Canyon (10-12), Savana 1500 Van (10-12), Sierra 1500 / Denali 1500 (10-12), Yukon / XL 1500 (10-12)
Hummer: H3 (10)
Saturn: Outlook (10), Vue (10)
Note: Some 2012 models are specified as ‘w/o integrated trailer brake control’. Please confirm your vehicle’s options.
Frequently Asked Questions
Why do I need to provide my VIN?
Your VIN is essential. We use it to load the exact, correct GM software for your vehicle’s specific configuration. This ensures perfect communication between modules and prevents performance issues, making the part truly plug-and-play.
Is this part difficult to install?
For someone with moderate mechanical skill, it is a straightforward replacement. It involves unbolting the old module and plugging in the new one. However, its location can sometimes be tight, so having the right tools is key.
Where is the FSCM located on a 2011 Buick Enclave?
On the 2010-2012 Buick Enclave, as well as the Acadia and Traverse, the Fuel System Control Module is typically mounted to the rear crossmember, near the fuel tank.
Will this fix a P069E or U0109 trouble code?
Yes, these are two of the most common codes indicating a failed FSCM or a loss of communication with it. While you should always confirm the diagnosis, this module is the definitive fix for these codes in most cases.
Can I just use a module from a junkyard?
We strongly advise against it. A used module will be programmed to the VIN of the donor vehicle, which will almost certainly cause communication errors, no-start conditions, or other performance problems in your car. Our modules have fresh, vehicle-specific programming.
My original part is 20877116. Will this one work?
Yes. This module, 20791901, is fully compatible and serves as a direct replacement for part numbers 20827745, 20877116, and 20850927. It will function identically once programmed to your VIN.