Restore Your Truck’s Power and Reliability
Is your 2008-2009 Sierra Denali suffering from frustrating issues like stalling, hesitation on acceleration, or a dreaded no-start condition? Before you consider replacing the entire fuel pump, the problem often lies with a faulty Fuel Pump Control Module (FPCM). This critical component, also known as a Fuel System Control Module (FSCM), regulates the voltage sent to your fuel pump, ensuring your engine gets the precise amount of fuel it needs. When it fails, it can mimic a bad fuel pump, leading to expensive and unnecessary repairs.
This is a direct-replacement FPCM, part number 20850907, that arrives at your door fully programmed to your vehicle’s specific VIN. We handle the complex flashing process for you, loading the latest GM software updates to ensure optimal performance and communication with your vehicle’s computer. This eliminates the need for a costly trip to the dealership for programming, making this a true plug-and-play solution for both professional technicians and determined DIYers.
Case Study: A Tricky Diagnosis
I once had a 2008 Silverado 1500 towed into my bay with a classic ‘crank, no start’ complaint. The owner had already replaced the fuel pump himself, but the issue persisted. He was frustrated and out a few hundred dollars. Hooking up my scan tool, I wasn’t getting any communication with the fuel pump module (a U0109 code). I went straight to the FPCM, located on the driver’s side frame rail. A visual inspection showed heavy corrosion on the casing and connectors—a common sight on these trucks. After confirming power and ground to the module, it was clear the FPCM itself had failed internally. A new, pre-programmed module had the truck running perfectly in under 20 minutes. It’s a textbook example of why diagnosing the FPCM first can save significant time and money.
Is Your Truck Showing These Symptoms?
A failing FPCM can cause a range of issues that are often misdiagnosed. If you’re experiencing any of the following, this module is the likely solution:
- ✔ Intermittent stalling or engine cutting out while driving
- ✔ Crank but no-start condition, especially when warm
- ✔ Reduced engine power and poor acceleration
- ✔ Check Engine Light with codes such as P069E, P0230, or U0109
- ✔ A fuel pressure gauge showing erratic or low readings
A Straightforward Guide to Installation
Replacing the 2008-2009 Sierra Denali FPCM is a job most people can handle with basic tools. It’s typically located on the driver-side frame rail, near the spare tire.
- Safety First: Disconnect the negative terminal from your vehicle’s battery.
- Locate the Module: Find the FPCM mounted to the frame crossmember. It’s a small, finned aluminum box with electrical connectors.
- Disconnect Wiring: Carefully unplug the electrical harnesses connected to the old module. Press the release tabs firmly to avoid damaging the clips.
- Remove Old Module: Unbolt the old FPCM from the frame. These bolts can sometimes be rusty, so a little penetrating oil might be helpful.
- Install New Module: Bolt the new, pre-programmed FPCM into place. Ensure it is securely mounted.
- Reconnect Wiring: Plug the electrical connectors into the new module until they click, ensuring a secure connection.
- Final Step: Reconnect the negative battery terminal. Turn the key to the ‘On’ position for 10 seconds before starting the engine to allow the system to initialize.
Verified Vehicle Compatibility
This module is a direct replacement for a wide range of GM trucks and SUVs. It is compatible with the following part numbers: 13501024, 15213110, 20759945, 20850907, 25785013, 25854536, 25866052, and 25967325. Please confirm your vehicle is on the list below for guaranteed fitment.
ACADIA 09, AVALANCHE 1500 08-09, CANYON/COLORADO 09, ENCLAVE 09, ESCALADE/ESV/EXT 08-09, EXPRESS/SAVANA 1500 VAN 08-09, HUMMER H2 08-09, HUMMER H3 09, OUTLOOK 09, SIERRA 1500 PICKUP 07 (New Body Style) & 08-09, SIERRA DENALI 08-09, SILVERADO 1500 PICKUP 07 (New Body Style) & 08-09, SUBURBAN 1500 08-09, TAHOE 08-09, TRAVERSE 09, VUE 08-09, YUKON/YUKON XL 1500 08-09.
Frequently Asked Questions
Why do you need my VIN?
Your Vehicle Identification Number (VIN) is required so we can program the module with the exact software and calibrations for your specific vehicle. This ensures it works correctly right out of the box, with no dealership visit needed.
Is this part difficult to install?
No, this is one of the easier modules to replace. It’s typically mounted on the frame rail and held on by a few bolts. With basic hand tools, most DIYers can complete the job in under 30 minutes.
Will this fix a P069E trouble code?
Yes, the DTC P069E (Fuel Pump Control Module Requested MIL Illumination) is one of the most common codes indicating a failed FPCM. Replacing the module with this pre-programmed unit is the correct fix for this code.
What happens if I install it without programming?
An unprogrammed module will not communicate correctly with your vehicle’s Engine Control Module (ECM). This will result in a no-start condition and set communication error codes. Our pre-programming service solves this problem for you.
Where is the FPCM located on my 2009 Sierra Denali?
On most GMT900 platform trucks, including the 2008-2009 Sierra Denali, the FPCM is mounted to the frame crossmember above the spare tire on the driver’s side of the vehicle.