Question about 2003 Hummer H2

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Gas gauge and speedometer not working

Hi, I own a '03 Hummer H2 suv my gas gauge shows full when it's above 1/2 and my speedometer shows I'm doing 40+ mph when I'm stopped at a traffic light both started these problems at the sametime? Please help me Thanks!

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For what i had experienced is to change the fuel sender unit and speedometer gauge and recalibrate the IPC to the latest calibration.

Posted on Jun 01, 2009

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1 Answer

When I connected diagnostic/testers to the OBD-II connector on my 2007 Hummer H2 SUV, they did not work at all, does anyone know why ? What are the exact pinout of this connector on Hummer H2 ?


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