GM Service Manual Online
For 1990-2009 cars only

The information in this table is intended for use with the J 33431-C Signal Generator and Instrument Panel Tester. The fuel level sensor values represent the test values to be used on the Signal Generator to drive the fuel gage display to the indicated positions. Vehicles that require more than one fuel level sensor calculate gage position from many possible resistance combinations of fuel levels between the 2 tanks. Therefore, the values in the table may not correlate directly to readings taken from the vehicle primary or secondary sending units.

The values in the table are approximate values based on information obtained from properly operating vehicles. Actual results may vary slightly.

3.8L (L26 and L32)

Fuel Gage Display

Voltage

Resistance

Fuel Level

E

0-0.5 V

26-31 ohms

0-6%

1/4

1.3 V

84 ohms

28%

1/2

1.6 V

117 ohms

49%

3/4

2.0 V

157 ohms

71%

F

2.5 V

225-250 ohms

93-100%

3.6L (LY7)

Fuel Gage Display

Voltage

Resistance

Fuel Level

E

0.8 V

40-4 ohms

4.92 L (1.3 Gallons)

1/4

1.3 V

84 ohms

17.79 L (4.7 Gallons)

1/2

1.6 V

118 ohms

32.93 L (8.7 Gallons)

3/4

2.0 V

170 ohms

52.61 L (13.9 Gallons)

F

2.5 V

225-250 ohms

63.97 L (16.9 Gallons)