RI Hummer... some other thoughts. I assume your H2 will start & run. This again means that the passlock system is not activated (doing its job). The system is powered up all the time. This would indicate a loss of power to the system. Again, check fuses, etc. If you were disconnecting/connecting various wires/grounds during your wiper installation retrace your steps to be certain you didn't leave a wire disconnected. One other last resort if you have Onstar you might see if they can run diagnostics that might help you. Hope this helps with some ideas.
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Jonahs
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