2001 Isuzu Rodeo Question Fuel guage inoperative

2001 ISUZU RODEO
45,258 MILES • 6 CYL • 2WD • AUTOMATIC
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TIM 69
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I replaced the tank sending unit and this didn't fix the problem. On the advice of a Isuzu tech I also replaced the ECM located under the hood on the driver's side.

The fuel guage reads empty and the low fuel light stays on even with a full tank.

A tech checked the sending unit and it appears good.

What could the problem be?

Thank you,
Tim
Jul 9, 2008 at 4:04 PM
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RPISCI2638
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You'l have to get the G.M. dealer or someone with a tech II scanner to flash the pcm to get the sending unit programmed. the sending unit sends a signal to the pcm then the pcm powers the fuel gauge.
Aug 21, 2008 at 6:04 PM