Restore Your Vehicle’s Performance and Reliability
Is your 2010-2012 Buick LaCrosse or other GM vehicle experiencing frustrating issues like stalling, hesitation, a long crank time, or a sudden ‘Reduced Engine Power’ message? Before you condemn the fuel pump, the real culprit is often its electronic brain: the Fuel System Control Module (FSCM). This critical component regulates the voltage sent to the fuel pump, ensuring your engine gets the precise amount of fuel it needs. When it fails, it can cause a host of intermittent and confusing problems that can leave you stranded.
This isn’t just a replacement part; it’s a complete solution. We take a genuine OEM-quality FSCM and program it with the latest GM software specifically for your vehicle’s Vehicle Identification Number (VIN). This means it arrives at your door ready for a true plug-and-play installation, saving you a costly trip to the dealership for programming. Get your vehicle running right again with a reliable, straightforward fix.
From the Diagnostic Bay: The Ghost of a Stalling Silverado
A customer brought in his 2011 Silverado 1500 with a classic, frustrating complaint: it would die randomly at stoplights, then start right back up. No consistent check engine light, just a history code for P069E (Fuel Pump Control Module Commanded On). In the shop, I’ve seen this dozens of times. These FSCMs, often mounted on the frame rail, take a beating from weather and vibration. Instead of just throwing a fuel pump at it, we monitored the FSCM’s commanded fuel pressure versus the actual pressure on the rail. The command was steady, but the actual pressure would erratically drop just before a stall. This confirmed the FSCM was failing internally. We installed one of our pre-programmed modules, and the truck was back on the road in under 30 minutes, running perfectly. This is the exact, reliable fix for that kind of problem.
Is Your GM Vehicle Showing These Signs?
- ✔ Engine stalls unexpectedly, especially at low speeds or idle.
- ✔ Vehicle hesitates or stumbles during acceleration.
- ✔ Extended cranking time before the engine will start.
- ✔ Check Engine Light is on with codes like P069E, P0230, or P2635.
- ✔ ‘Reduced Engine Power’ or ‘Service Fuel System’ message on the dash.
- ✔ A noticeable whine from the fuel pump that changes pitch erratically.
A Straightforward Guide to Installation
Installing your pre-programmed 2010-2012 LaCrosse FSCM is a simple process that most DIYers can handle. Since the programming is done, no special tools are required.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before beginning any electrical work.
- Locate the Module: On trucks and SUVs (like Silverado, Tahoe, Escalade), the FSCM is typically mounted on the driver’s side frame rail, near the spare tire. On cars (like LaCrosse, CTS, Impala), it’s often found in the trunk area, behind a trim panel on the right-hand side.
- Disconnect and Remove: Carefully unplug the electrical connectors. Note their orientation. Then, unbolt the old module from its mounting location.
- Install the New Module: Bolt your new, pre-programmed FSCM into place. Securely reconnect the electrical connectors.
- Final Step: Reconnect the negative battery terminal. Start the vehicle and allow it to idle for a few minutes to confirm the repair.
Verified Vehicle Compatibility
This module is a direct-fit replacement for a wide range of General Motors vehicles. Please verify your model and year below. This part is compatible with part numbers 20791901, 20827745, 20877116, and 20850927.
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 / Yukon XL 1500 (10-12)
Hummer: H3 (10)
Saturn: Outlook (10), Vue (10)
Note: Some models have specific options (e.g., ‘w/o integrated trailer brake control’). Please ensure your vehicle matches the fitment details.
Frequently Asked Questions
What does a Fuel System Control Module (FSCM) do?
The FSCM, sometimes called a fuel pump driver module, acts as a smart relay. It receives commands from the Engine Control Module (ECM) and precisely controls the speed of the fuel pump by varying the voltage it supplies. This ensures optimal fuel pressure and efficiency under all driving conditions.
Do I really need to provide my VIN?
Yes, absolutely. Providing your VIN is essential. We use it to load the correct, vehicle-specific GM software onto the module before shipping. This step ensures the module communicates properly with your vehicle’s other computers and makes the installation a simple plug-and-play process, saving you a trip to the dealer.
Will this fix a P069E diagnostic trouble code?
In the vast majority of cases, yes. The code P069E (‘Fuel Pump Control Module Commanded On’) is a very common indicator that the FSCM itself has failed. Replacing it with this pre-programmed unit is the standard, effective repair for this code.
Is this part difficult to install myself?
Not at all. For most DIYers with basic hand tools, this is a very manageable job. Since we handle the programming, the physical swap is straightforward. The most challenging part is simply accessing the module, which is usually on the frame rail or in the trunk.
Is this compatible with other part numbers?
Yes. This module is a direct replacement for several part numbers, including 20791901, 20827745, 20877116, and 20850927. If your original module has any of these numbers, this part will work for your vehicle after being programmed to your VIN.