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Fuel Gauge: Notes

Use a suitable Gas Gauge Tester (J-22344 or equivalent). Disconnect feed wire from the gas gauge tank terminal and connect one test lead to the wire and ground the other lead. Switch tester to "EMPTY" and "FULL" positions and fuel gauge should read the same as the tester. If not, proceed with the following tests with ignition in "ON" position.

Fig 1: General Motors "G" Models Instrument Cluster
G09327723Courtesy of GENERAL MOTORS COMPANY
Fig 2: General Motors "C" & "K" Models Instrument Cluster
G09327724Courtesy of GENERAL MOTORS COMPANY