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
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Wednesday, July 9th, 2008 AT 4:04 PM
1 Reply
RPISCI2638
MEMBER
2 POSTS
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.