Sparta PN4078 Fuel Tank Sending Unit

Fuel Tank Sending Unit for Classic GM Trucks

The Sparta PN4078 fuel tank sending unit is built for gasoline applications in higher-mileage and earlier model vehicles. It provides the fuel level signal your gauge relies on, with OE-informed fit and performance support from Delphi distribution.

• Fuel type: gas
• Terminal type: pin, male terminal, 1 terminal
• 1 outlet
• Strainer included
• Resistance: 0 ohms empty, 95 ohms full
• Package contents: fuel tank sending unit with float arm, seal, (2) retainer clips, instruction sheet

Detailed Product Overview

Sparta PN4078 is a fuel tank sending unit for select Chevrolet C10, C20, C30, K10, K20, and K30 trucks, plus 1979 GMC C1500, C2500, C3500, K1500, K2500, and K3500 models. It is designed for gasoline fuel systems and uses a pin-style male terminal with one electrical connection for the fuel level circuit. The unit’s 0-ohm empty and 95-ohm full resistance range supports accurate gauge operation in the listed applications. This part cross-references Dorman OE Solutions 692-073 for the same application.

Vehicle Fitment

• Fits 1975-1979 Chevrolet C10, N/A
• Fits 1975-1979 Chevrolet C20, N/A
• Fits 1975-1979 Chevrolet C30, N/A
• Fits 1975-1979 Chevrolet K10, N/A
• Fits 1975-1979 Chevrolet K20, N/A
• Fits 1977-1979 Chevrolet K30, N/A
• Fits 1979 GMC C1500, N/A
• Fits 1979 GMC C2500, N/A
• Fits 1979 GMC C3500, N/A
• Fits 1979 GMC K1500, N/A
• Fits 1979 GMC K2500, N/A
• Fits 1979 GMC K3500, N/A

Common Repair Uses

• Restores fuel level gauge readings that are stuck, erratic, or inaccurate
• Addresses worn sender contacts in older Chevrolet and GMC truck fuel tanks
• Replaces a damaged float arm or failed sending unit assembly
• Helps correct fuel gauge behavior after tank service or restoration work
• Supports proper fuel level reporting in classic GM truck applications

Installation Notes

Verify tank style, electrical connector style, and resistance range before installation. The package includes the sending unit, float arm, seal, and retainer clips; follow the instruction sheet for proper placement and sealing. Clean the tank opening and inspect the fuel strainer area during installation to help ensure reliable operation.

Quality Assurance

Sparta is distributed by Delphi, an OE full-line fuel supplier with application knowledge focused on fit and performance for earlier model vehicles. That OE-backed sourcing supports confidence when selecting PN4078 for classic Chevrolet and GMC truck fuel system service.