I have installed a new Gem on 11/16/2005 for the 4x4 not working. On 01/20/2006 the vehicle came back for the 4x4 high and the 4x4 low lights flashing. I checked for codes in the pcm and there were none. I checked for codes in the Gem and got codes P1804 and P...

FIX posted 3/1/2006

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