Spectra FG10C Fuel Tank Sending Unit

The Spectra FG10C fuel tank sending unit is a direct-fit replacement for select Cadillac fuel systems that need accurate fuel level reporting and dependable tank-side operation. Built for 1977-1980 Cadillac DeVille and Fleetwood applications, plus 1982 Cadillac Fleetwood, it supports OE-style service on classic GM vehicles.

• Fuel tank sending unit for select Cadillac applications
• OE-style replacement for fuel level sensing service
• Fits 1977-1980 Cadillac DeVille, N/A
• Fits 1977-1980 Cadillac Fleetwood, N/A
• Fits 1982 Cadillac Fleetwood, N/A
• Part number FG10C for application matching and catalog lookup

Application Details

Compatible with 1977-1980 Cadillac DeVille and 1977-1980 Cadillac Fleetwood, as well as 1982 Cadillac Fleetwood. This Spectra FG10C unit is engineered and manufactured with quality control processes intended to meet or exceed the performance of the original equipment it replaces. This part cross-references 25000614 and TNKFG10C for the same application.

Common Replacement Reasons

• Inaccurate or erratic fuel gauge readings
• Fuel level sender wear from age and tank exposure
• Intermittent gauge movement during driving
• Service replacement during fuel tank repair
• Restoration work on classic Cadillac DeVille and Fleetwood models

Installation Notes

For 1977-1980 Cadillac DeVille and Fleetwood applications, the notes specify 3 outlets. The fuel tank must be inspected and cleaned before installation. Replacing the tank lock ring and seal is required; failure to do so voids the warranty. Verify tank condition and fitment before installation of FG10C.

Quality Assurance

Spectra Premium fuel tank sending units are built with engineering, manufacturing technology, and quality control processes aimed at matching or exceeding OE performance. The FG10C is intended for reliable service in classic Cadillac fuel delivery systems and is backed by the warranty terms noted in the fitment instructions.