What the Delphi FG1057 Replaces (and Why Full Modules Matter)
Modern fuel systems rely on an integrated fuel pump module, not just the pump itself. The Delphi FG1057 replaces the entire assembly, including:
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High-pressure electric fuel pump
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Fuel level sending unit
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Strainer (pre-filter)
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Internal pressure regulation components
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OE-style electrical connectors and housing
Replacing only the pump motor often leads to repeat failures caused by worn sending units, clogged strainers, or weak internal regulators. This module solves all of it at once.
Performance, Reliability & Drivability Benefits
Delphi fuel modules are engineered to maintain factory-correct fuel pressure (PSI) and stable flow volume, which is critical for injector atomization and proper air-fuel ratios.
Benefits of installing the FG1057:
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Restores consistent fuel pressure
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Improves cold starts and throttle response
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Eliminates hesitation and lean conditions
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Ensures accurate fuel gauge operation
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Protects injectors and engine longevity
This isn’t a performance pump—but without correct fuel delivery, performance doesn’t exist. Reliability is performance.
Safety & Engineering You Can Trust
Fuel pumps operate submerged in gasoline for cooling. As pumps age, they draw more current, generate excess heat, and stress wiring—raising the risk of electrical failure or vapor issues.
The Delphi FG1057 is built with:
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OE-quality materials and motor design
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Precision-tested electrical components
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Proper sealing to prevent vapor leaks
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Factory-style fitment and connectors
Best practice: Always replace the fuel filter after installation and avoid running the tank below ¼ full to extend pump life.
Fuel Module Assembly. Delphi brings 80 + years of OE Heritage into each Delphi assembly, ensuring quality and fitment for each Delphi part.
Installation Notes
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Direct-fit, vehicle-specific design
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No splicing or modification required
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Installs using factory mounting points
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Professional installation recommended if tank removal is required
This is how fuel system repairs should be done—once, correctly.
From the manufacturer
Where Does Delphi Quality Come From?
OE Engineered
Our parts are engineered with the same stringent standards applied to the parts we make for the top global OEMs.
Durability Tested
Our rigorous testing ensures reliability and readiness for the road ahead. In fact, our parts are tested up to 150,000 miles and in more than 20% ethanol.
For Over 80 Years
Our expertise goes back to the beginning and we’re still innovating today. We’ve been a manufacturer of dependable fuel delivery parts for over 80 years.
Innovative Design
We utilize the latest OE technology and components to bring OE quality and durability to our fuel line and even make enhancements over some OE designs. In fact, we hold more than 30 OE-proprietary innovations and patents in fuel alone.
Fueled by Innovation: Delphi’s OE DNA
When it comes to choosing the parts for fuel delivery systems, reach for the brand that delivers the most advantages: Delphi. In the aftermarket, we’re best known for our fuel management program. As a world manufacturer in fuel pump technology and an OE manufacturer, we apply our high quality standards to every part we sell.
Why Do Fuel Pumps Fail?
OE fuel modules and hanger/senders, which house the electric fuel pump, typically operate for 7-10 years before failure, depending on a variety of circumstances. Premature failures can be caused by:
- Extreme hot/cold environments
- Contaminated fuel, which can cause rust or corrosion
- Excessively running a vehicle on an empty tank. Running near empty does not keep the fuel pump fully submerged and can cause the pump to overheat.
- 21% of returned fuel pumps failed because they operated in a contaminated system. Before installing a new pump, make sure to visually inspect for dirt, rust or discoloration.
Tech Tips
Start Your New Pump in a Clean Environment
Replacing the fuel pump strainer is required, but it is not enough if the tank is dirty. Make sure to inspect and clean the fuel tank as well.
Clogged filters are a leading cause of premature pump failure, so replace the fuel filter if it is not internal to the assembly. Internal filters are not serviced separately.
A Pressure Test is Not Enough to Condemn the Pump
High fuel pressure can often be attributed to a fuel pressure regulator issue or a restriction in the return line. The engine may run rich or fuel trims may be elevated.
Low fuel pressure can be caused by insufficient power or ground to the fuel pump or a malfunctioning fuel pressure regulator. Contamination in the system can cause restrictions to the fuel feed lines, fuel strainer, or fuel filter.
No pressure can be due to a faulty relay, fuse, wire harness, or oil pressure switch, tripped inertia switch, or dried test fluid.
What to Check Prior to Repair
The pump may not necessarily be the cause of fuel-related driveability problems or failures. So make sure to:
1. Confirm there is fuel in the fuel tank
2. Check fuel pressure
3. Check flow
4. Check fuel filter and pressure regulator
5. Perform a voltage drop test
6. Check electrical connections
7. Clean tank and inspect for debris
What Tools Will I Need?
Safety glasses and gloves are always recommended. Delphi also recommends a digital voltmeter, pressure gauge, and graduated cylinder. You should always have a fire extinguisher on hand.
Safety first
Never smoke or work near anything that could cause a spark or ignite fuel, such as pilot lights or incandescent light bulbs. Work in a well-ventilated area. Keep clean-up materials on hand, and clean up any spills immediately.
Always relieve fuel pressure prior to opening fuel systems. Store fuel in an approved container like a gas caddy or gas can.
Delphi Fuel Modules
Delphi Hanger Pump Assemblies
Delphi Electric Fuel Pumps
Why Buy from Pro Street Online
At Pro Street Online, we focus on parts that actually solve problems. The Delphi FG1057 is the right choice if you want OEM-level reliability, not mystery-brand guesswork.
If your fuel system is failing, this is the fix you install and forget.
JB Kid –
GET THIS ONE! I bought this for my 2011 gmc sierra 1500. It fits well. It is a big job to change the fuel pump. Get a really high quality unit like this one. It looks more rugged than the original. It was easy to install, once everything was already removed and cleaned up. It has been functioning well for almost 2 years.
Scott Smith –
both fuel connections and both electrical connections were correct 2011 gmc 1500
ElCid89 –
So far so good on my ’10 Silverado 5.3.
michael charpentier –
Perfect fit,no lock ring with pump,but worth the money. You don’t want to do this job twice.
Michael Derosa –
Nice fit work’s fine
Woods –
O.E.M. Fit. Works as original equipment
Miechelle Davis –
Direct replacement 2009 Silverado 1500 with 6.0 engine. Plug wires were the same.
James S. Trumble –
Fuel pump was a great price compared to what was available locally. It was not an easy install. Requires dropping fuel tank or removing truck bed. We went with removing the bed. Requires fuel line disconnect tools. Once bed was removed and lines disconnected, install was a breeze. It’s getting to that point that was difficult. Old pump broke during removal, but was probably still good. Fuel Pressure Control Module was bad (which requires programming).
Dave B –
It works on the 5.3. great fuel pump
Like many others, my original rotted out. It was actually spraying gas through a pinhole leak.This new one fits my 2011 5.3 aluminum block perfectly even though Amazon said it did not.According to Delphi site it also fits the cast iron 5.3 without issue.I’m putting this here because I had to do quite a bit of research to confirm what my gut told me that this would fit my truck.
Dave –
Silverado 2009 1500 crew cab flex fuel
Fit perfect for 2009 1500 silverado crew cab with 5.5 ft box.Swapped the fuel pressure sensor with my old one as I read the reviews and that tends to be an issue. Got it back together no problem. Been running for weeks as my daily driver since, no issues, no codes, no problems