1965-97 GM; Fuel Tank Sending Unit; 0-90 Ohm; Universal Fit; For 6" to 24" Deep Fuel Tanks; Without Pick-Up Tube

Universal fuel tank sending unit for various 1965-97 Chevrolet and GMC trucks with custom tank under the bed and other GM models 1965 and later, that require a 90 ohm sender. Designed for use with OE or aftermarket 0-90 ohm gauges, each sending unit includes the sender, float, float rod, hardware, instructions, and seal. Since fuel tank senders only read resistance-to-ground, this sender will work on all 6-24 volt systems with positive or negative ground.

Sender does NOT have a pickup tube built into it like original senders do. Will work with most aftermarket fuel tanks from 6" to 24" deep by cutting the float rod to the length required by using the supplied instruction sheet. Refer to guide below for additional information about fuel sending units. Senders will only work on applications where the sending unit is mounted in the top of the tank.

• Uses standard 5-bolt GM bolt pattern
• Does NOT have fuel pickup tube
• Resistance 0-90 Ohms: Empty-Full
• For use with gravity feed tanks
• For use with FI tanks that use submersible fuel pump
• Adjustable float rod

• 1969 - 1994 Chevrolet Blazer
• 1975 - 1986 Chevrolet C10
• 1965 - 1967 Chevrolet C10 Panel
• 1965 - 1974 Chevrolet C10 Pickup
• 1967 - 1986 Chevrolet C10 Suburban
• 1983 - 1986 Chevrolet C15
• 1988 - 1997 Chevrolet C1500
• 1992 - 1997 Chevrolet C1500 Suburban
• 1975 - 1987 Chevrolet C20
• 1967 - 1967 Chevrolet C20 Panel
• 1965 - 1974 Chevrolet C20 Pickup
• 1967 - 1986 Chevrolet C20 Suburban
• 1988 - 1997 Chevrolet C2500
• 1992 - 1997 Chevrolet C2500 Suburban
• 1975 - 1986 Chevrolet C30
• 1965 - 1966 Chevrolet C30 Panel
• 1965 - 1974 Chevrolet C30 Pickup
• 1984 - 1997 Chevrolet C35
• 1988 - 1997 Chevrolet C3500
• 1975 - 1986 Chevrolet K10
• 1965 - 1974 Chevrolet K10 Pickup
• 1967 - 1986 Chevrolet K10 Suburban
• 1988 - 1997 Chevrolet K1500
• 1992 - 1997 Chevrolet K1500 Suburban
• 1975 - 1986 Chevrolet K20
• 1967 - 1967 Chevrolet K20 Panel
• 1965 - 1974 Chevrolet K20 Pickup
• 1967 - 1986 Chevrolet K20 Suburban
• 1988 - 1997 Chevrolet K2500
• 1992 - 1997 Chevrolet K2500 Suburban
• 1977 - 1986 Chevrolet K30
• 1968 - 1974 Chevrolet K30 Pickup
• 1988 - 1997 Chevrolet K3500
• 1975 - 1986 Chevrolet K5 Blazer
• 1987 - 1987 Chevrolet R10
• 1987 - 1988 Chevrolet R10 Suburban
• 1989 - 1991 Chevrolet R1500 Suburban
• 1987 - 1988 Chevrolet R20
• 1987 - 1988 Chevrolet R20 Suburban
• 1989 - 1989 Chevrolet R2500
• 1989 - 1991 Chevrolet R2500 Suburban
• 1987 - 1988 Chevrolet R30
• 1989 - 1991 Chevrolet R3500
• 1995 - 1997 Chevrolet Silverado
• 1965 - 1966 Chevrolet Suburban
• 1995 - 1997 Chevrolet Suburban 1500
• 1995 - 1997 Chevrolet Tahoe
• 1965 - 1997 Chevrolet Truck
• 1987 - 1987 Chevrolet V10
• 1987 - 1988 Chevrolet V10 Suburban
• 1989 - 1991 Chevrolet V1500 Suburban
• 1987 - 1987 Chevrolet V20
• 1987 - 1988 Chevrolet V20 Suburban
• 1989 - 1991 Chevrolet V2500 Suburban
• 1987 - 1988 Chevrolet V30
• 1989 - 1991 Chevrolet V3500

• 1966 - 1966 GMC 1000
• 1965 - 1965 GMC 1000 Series
• 1966 - 1966 GMC 1500
• 1965 - 1965 GMC 1500 Series
• 1966 - 1966 GMC 2500
• 1965 - 1965 GMC 2500 Series
• 1975 - 1978 GMC C15
• 1975 - 1978 GMC C15 Suburban
• 1967 - 1974 GMC C15/C1500 Pickup
• 1967 - 1974 GMC C15/C1500 Suburban
• 1979 - 1997 GMC C1500
• 1979 - 1997 GMC C1500 Suburban
• 1975 - 1978 GMC C25
• 1975 - 1978 GMC C25 Suburban
• 1967 - 1974 GMC C25/C2500 Pickup
• 1967 - 1974 GMC C25/C2500 Suburban
• 1979 - 1997 GMC C2500
• 1979 - 1997 GMC C2500 Suburban
• 1975 - 1978 GMC C35
• 1967 - 1974 GMC C35/C3500 Pickup
• 1979 - 1997 GMC C3500
• 1970 - 1991 GMC Jimmy
• 1975 - 1978 GMC K15
• 1975 - 1978 GMC K15 Suburban
• 1967 - 1974 GMC K15/K1500 Pickup
• 1967 - 1974 GMC K15/K1500 Suburban
• 1979 - 1997 GMC K1500
• 1979 - 1997 GMC K1500 Suburban
• 1975 - 1978 GMC K25
• 1975 - 1978 GMC K25 Suburban
• 1967 - 1974 GMC K25/K2500 Pickup
• 1967 - 1974 GMC K25/K2500 Suburban
• 1979 - 1997 GMC K2500
• 1979 - 1997 GMC K2500 Suburban
• 1977 - 1978 GMC K35
• 1968 - 1974 GMC K35/K3500 Pickup
• 1979 - 1997 GMC K3500
• 1987 - 1987 GMC R1500
• 1987 - 1991 GMC R1500 Suburban
• 1987 - 1989 GMC R2500
• 1987 - 1991 GMC R2500 Suburban
• 1987 - 1991 GMC R3500
• 1965 - 1966 GMC Suburban
• 1965 - 1997 GMC Truck
• 1987 - 1987 GMC V1500
• 1987 - 1991 GMC V1500 Suburban
• 1987 - 1987 GMC V2500
• 1987 - 1991 GMC V2500 Suburban
• 1987 - 1991 GMC V3500
• 1992 - 1997 GMC Yukon

ANSWER: A fuel sender can be bench tested with a multimeter. With the multimeter set to the O setting put the red probe on the post that is the gauge lead and put the black probe on the ground post or on the body of the fuel sender. Record your readings with the fuel sender in the empty position and in the full position. Those two numbers will tell you the ohm range is of your sender.

The first step would be to make sure that you have the proper ohm range fuel sender to match your gauges. For example a 73-10 ohm fuel sender would read backwards on a 0-90 ohm fuel gauge. If you find you have the correct ohm range fuel sender make sure that the float arm is installed on the correct side. The front of the rheostat shows which side the float should stick out from. If the float arm is installed on the other side the gauge will read backwards. Also if the rheostat is installed upside down the gauge will read backwards.

If you have disassembled your sender unit, and now it won't read correctly, check the following:

1.) Make sure that the bracket is in full contact with the flange. There should be full continuity between the metal strip between the rheostat and the bracket and the bracket and the flange.

2.) Make sure that the center gauge lead post is isolated from the flange and bracket. If that post is grounding out you will only see zero ohms on a gauge or multimeter.