What is the stock sender ohm range? I am making a custom fuel cell for my 2002 Silverado and I'll need a sender that will work with my stock gauge on my dash. I think it's 0 ohms empty, 90 ohms full but I might be wrong.

 

I'm pretty sure its not 0-90ohm. Do a search and that could reveal an answer. Hopefully someone will respond as I'm interested too.

 

Blown06 I just found this thread and it says that it is 40/250 ohms. Looks like I'm off to find a sender.

 

Fuel Level Specifications
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
Sender Voltage
Fuel Level
Fuel Remaining

26.0 Gallon Tank (Short Bed Pickup and 4-Door Utility)

E
40-66 ohms
1.0 V
0-13%
0-11.9 L (0-3.1 gal)

1/4
83-110 ohms
1.25 V
30-35%
32.8 L (8.7 gal)

1/2
118-140 ohms
1.6 V
50-55%
51.3 L (13.5 gal)

3/4
150-190 ohms
2.2 V
72-78%
74.3 L (19.7 gal)

F
197-250 ohms
2.5 V
88-100%
92.8-98.4 L (24.5-25.9 gal)

Low Fuel Indicator On
62-72 ohms
1.1 V
11-17%
16.5 L (4.3 gal)

Low Fuel Indicator Off
74-83 ohms
1.2 V
14-25%
18.9 L (5 gal)

33.0 Gallon Tank (Suburban 1500 and 2500 Series)

E
40-58 ohms
0.9 V
0-13%
0-15.1 L (0-4 gal)

1/4
83-110 ohms
1.25 V
30-35%
41.6 L (11 gal)

1/2
118-148 ohms
1.9 V
50-55%
64.4 L (17 gal)

3/4
155-195 ohms
2.3 V
68-78%
84 L (22.2 gal)

F
199-250 ohms
2.5 V
88-100%
118.8-123.4 L (31.4-32.6 gal)

Low Fuel Indicator On
55-69 ohms
0.9 V
11-17%
14.3 L (3.80 gal)

Low Fuel Indicator Off
70-80 ohms
1.1 V
14-26%
19.3 L (5.1 gal)

34.0 Gallon Tank (Long Bed Pickup)

E
40-6 ohms
1.0 V
4-14%
4.5-15.7 L (1.2-4.1 gal)

1/4
80-11 ohms
1.5 V
30-36%
43.8 L (11.6 gal)

1/2
117-15 ohms
1.8 V
50-58%
70.4 L (18.6 gal)

3/4
155-195 ohms
2.1 V
70-80%
97.2 L (25.7 gal)

F
196-250 ohms
2.5 V
88-99%
123.6-126.9 L (32.6-33.5 gal)

Low Fuel Indicator On
61-72 ohms
1.1 V
11-14%
22.7 L (6 gal)

Low Fuel Indicator Off
76-83 ohms
1.2 V
13-25%
25.7 L (6.8 gal)

39.0 Gallon Tank (Suburban 2500 Series)

Important: The resistance values only reflect the specified fuel level when the signal circuits for both the primary and secondary fuel level senders are tied together.
The fuel remaining values are approximate.


E
12-29 ohms
1 V
2-14%
18.9 L (5 gal)

1/4
30-40 ohms
1.5 V
31-34%
45.4 L (12 gal)

1/2
43-64 ohms
1.8 V
50-58%
73.8 L (19.5 gal)

3/4
65-79 ohms
2.0 V
70-76%
98.4 L (26 gal)

F
95-125 ohms
2.4 V
87-100%
138.1-147.6 L (36.5-39 gal)

Low Fuel Indicator On
25-35 ohms
1.0 V
11-13%
28.3 L (7.5 gal)

Low Fuel Indicator Off
36-41 ohms
1.1 V
14-16%
30.2 L (8 gal)


straight from gmsi. hope it helps.
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Document ID# 675267
2002 Chevrolet Chevy C Silverado - 2WD

 

Sorry to bump an old thread but did GM change the resistance on the 2004+ returnless pumps?

On my stock 2004 sending unit i get 250 empty and 40ohm full. I have an old return style bucket laying around that i want to use and it is the opposite with 40 empty and 250 full. Can anyone verify if this is correct?

 

YES, In 2004 GM switched from the OLD EMPTY-40ohm FULL-250ohm to the Opposite. EMPTY-250ohm FULL-40ohm.