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 two 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.

Fuel Gauge Display

Resistance (ohms)

Fuel Level (%)

Fuel Remaining

20 Gallon Tank (Regular Wheel Base)

E

40-56

0-7

0-8.5 L (0-2.3 gal)

1/4

106

30

23.4 L (6.2 gal)

1/2

143

51

38.3 L ( 10.1 gal)

3/4

176

70

53.2 L (14.1 gal)

F

215-250

90-100

68.1-75.7 L (18-20 gal)

Low Fuel Indicator On

76

15

9.3 L (2.4 gal)

25 Gallon Tank (Long Wheel Base)

E

40-53

2-11

0-10.6 L (0-2.8 gal)

1/4

97

31

29.3 L (7.7 gal)

1/2

134

51

47.9 L ( 12.7 gal)

3/4

171

70

66.5 L (17.6 gal)

F

218-250

90-100

85.2-94.6 L (22.5-25 gal)

Low Fuel Indicator On

54

12

11 L (2.9 gal)