HomeAir and Fuel Delivery > Fuel Pumps and Related ComponentsDelphi MF0033 Mechanical Fuel Pump
Part #: MF0033

Delphi MF0033 Mechanical Fuel Pump

⚙️ 28 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Chevrolet and GMC, P30, R3500, P3500, R30, C20, C20 Suburban, C30, C2500, C2500 Suburban, and C3500
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Reliable Mechanical Fuel Pump for Chevrolet and GMC Trucks

The Delphi MF0033 mechanical fuel pump is designed to provide consistent fuel delivery for select Chevrolet and GMC truck models. Engineered for gas fuel systems, this pump ensures steady flow and pressure to support your vehicle's performance needs.

  • Compatible with Chevrolet and GMC C20, C20 Suburban, C30, C2500, C2500 Suburban, C3500, P30, P3500, R30, and R3500 models
  • Standard replacement mechanical fuel pump with a 0.500 inch inlet outside diameter
  • Includes gasket and instruction sheet for straightforward installation
  • Features hose bead inlet and threaded outlet with two outlets sized 5/8-18 UNF
  • Average flow rating of 25 gallons per hour at 7 psi system pressure

Technical Specifications and Features

The Delphi MF0033 mechanical fuel pump is designed for gasoline fuel systems, featuring a hose bead inlet with a 0.500 inch outside diameter to ensure secure hose connections. The pump includes two threaded outlets with 5/8-18 UNF fitting thread size, allowing for reliable fuel delivery. With an average flow rating of 25 gallons per hour and a system pressure of 7 psi, this pump meets the standard requirements for fuel delivery in medium-duty Chevrolet and GMC trucks. The package includes a gasket and an instruction sheet to assist with proper installation and sealing.

Applications and Common Issues Addressed

  • Replacement for worn or leaking mechanical fuel pumps in Chevrolet and GMC trucks
  • Resolves inconsistent fuel flow or pressure problems affecting engine performance
  • Addresses fuel delivery interruptions caused by damaged inlet or outlet fittings
  • Prevents fuel leaks with included gasket for a secure seal
  • Suitable for restoring fuel system reliability in C20, C2500, and P3500 series trucks

Installation Notes and Tips

When installing the Delphi MF0033 mechanical fuel pump, ensure the gasket is properly seated to prevent fuel leaks. Verify that the hose bead inlet and threaded outlets are securely connected to the fuel lines. Follow the included instruction sheet carefully to maintain correct system pressure and flow. It is recommended to inspect related fuel system components during installation to ensure overall system integrity.

Quality Assurance and Warranty

Delphi mechanical fuel pumps are manufactured to meet OEM standards for fit and function. The MF0033 part number undergoes rigorous quality control to ensure durability and reliable performance in Chevrolet and GMC trucks. This standard replacement part includes a gasket and installation instructions to support proper setup. Warranty coverage details should be confirmed with the point of purchase or Delphi directly.

BrandDelphi
Part NumberMF0033
Average Flow Rating25
Fuel TypeGas
Gasket Or Seal IncludedYes
Inlet Outside Diameter0.500
Inlet TypeHose Bead
Item GradeStandard Replacement
Outlet Fitting Thread Size5/8-18 UNF
Outlet Quantity2
Outlet TypeThreaded
Package ContentsMechanical Fuel Pump, Gasket, Instruction Sheet
System Pressure7 psi

This part fits 28 vehicles. Search below:

YearMakeModelPositionNotes
1989ChevroletP30N/AFits vehicles with a 3 Line Pump.
1989ChevroletR3500N/AFits vehicles with a 3 Line Pump.
1989GMCP3500N/AFits vehicles with a 3 Line Pump.
1989GMCR3500N/AFits vehicles with a 3 Line Pump.
1988ChevroletP30N/AFits vehicles with a 3 Line Pump.
1988ChevroletR30N/AFits vehicles with a 3 Line Pump.
1988GMCP3500N/AFits vehicles with a 3 Line Pump.
1988GMCR3500N/AFits vehicles with a 3 Line Pump.
1987ChevroletP30N/AFits vehicles with a 3 Line Pump.
1987ChevroletR30N/AFits vehicles with a 3 Line Pump.
1987GMCP3500N/AFits vehicles with a 3 Line Pump.
1987GMCR3500N/AFits vehicles with a 3 Line Pump.
1986ChevroletC20N/Awith 3 Line Pump; with Federal Emission System
1986ChevroletC20 SuburbanN/AFits vehicles with a 3 Line Pump.
1986ChevroletC30N/AFits vehicles with a 3 Line Pump.
1986ChevroletP30N/AFits vehicles with a 3 Line Pump.
1986GMCC2500N/AFits vehicles with a 3 Line Pump.
1986GMCC2500 SuburbanN/AFits vehicles with a 3 Line Pump.
1986GMCC3500N/AFits vehicles with a 3 Line Pump.
1986GMCP3500N/AFits vehicles with a 3 Line Pump.
1985ChevroletC20N/Awith 3 Line Pump; From 01/1985
1985ChevroletC20 SuburbanN/Awith 3 Line Pump; From 01/1985
1985ChevroletC30N/Awith 3 Line Pump; From 01/1985
1985ChevroletP30N/Awith 3 Line Pump; From 01/1985
1985GMCC2500N/Awith 3 Line Pump; From 01/1985
1985GMCC2500 SuburbanN/Awith 3 Line Pump; From 01/1985
1985GMCC3500N/Awith 3 Line Pump; From 01/1985
1985GMCP3500N/Awith 3 Line Pump; From 01/1985

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

424406442440647247868595AMF0033M23024M60480M6628SP1104MP

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.