My 01 gt backed it out of the garage the other day after setting for about a month. A couple of hrs later went to start itwould only turn over . Was sure it was the fuel pump . I replaced it. Still nothing. When I turn the key on the cooling fan runs the odometer has all dashes theft light is flashes. When I hook up my code reader it will not connect. From posts I read sounds like it might be the ccrm is there any way to test this before I go buy another?