Go back and scroll through that link I provided. There are some incorrect statements made. The correct ohm reading for the sending unit to work with your original dash gauge is one that provides 70 ohms resistance at EMPTY (float down) and 10 ohms resistance at FULL (float up). 0 - 90 ohms is the specification for EMPTY and FULL on older GM vehicles. Are you using an original instrument panel gauge?Thanks, seams right the after market sender unit I have is 0-270, guessing the Aussie after market version will be 0-90ohms?..