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

Fuel Gage Display

Resistance

Fuel Level

Fuel Remaining

20 Gallon Tank (Regular Wheel Base)

E

40-56 ohms

0-7%

0-8.5 L (0-2.3 gal)

1/4

106 ohms

30%

23.4 L (6.2 gal)

1/2

143 ohms

51%

38.3 L ( 10.1 gal)

3/4

176 ohms

70%

53.2 L (14.1 gal)

F

215-250 ohms

90-100%

68.1-75.7 L (18-20 gal)

Low Fuel Indicator On

76 ohms

15%

9.3 L (2.4 gal)

25.5 Gallon Tank (Long Wheel Base)

E

40-53 ohms

2-11%

0-10.6 L (0-2.8 gal)

1/4

97 ohms

31%

29.3 L (7.7 gal)

1/2

134 ohms

51%

47.9 L ( 12.7 gal)

3/4

171 ohms

70%

66.5 L (17.6 gal)

F

218-250 ohms

90-100%

85.2-94.6 L (22.5-25 gal)

Low Fuel Indicator On

54 ohms

12%

11 L (2.9 gal)