stock fuel gauge

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does any one know how the stock fuel gauge operates? i am looking at getting a sunpro gauge. i am replacing my temp/oil/volts dummy lights in my grand prix with sunpro gauges and am wondering about doing the fuel gauge as well. the sunpro one states it operates 240 ohms empty and 33 ohms full. i am wondering if i would need to replace my sending unit or not. here's the link.

Sunpro Fuel Gauge

 

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bump.

 

[adumb]

okay i think i found that gm sending units operate at 0 - 90 ohms. can anyone verify?

 

[supercrackerbox]

Lemme go put my reader on my sending unit and see if I can't get an answer for ya. Got some other stuff to do while I'm out there, so might be a couple hours.

 

[Brick442]

okay i think i found that gm sending units operate at 0 - 90 ohms. can anyone verify?

Correct.

 

[supercrackerbox]

Yep, that's what mine read.

 

[adumb]

Alright, Thanks everyone!!