Hello gang. I have been trying to get an answer to this problem for about a month now from all over. My 2000 Deville (Base) will not crank. Everything works, battry new, replace key cylinder, crank sensor A & B, ignition switch, starter and starter relay, and check all connections and grounds (to the best of my knowledge). There appears to be a break down between the starter and gound. If you connect a separate ground from body to starter the engine will turn over slowly. If you run the additional ground to the body, it barely turns the engine over I used jumper cables and also tried using on the battery ground. The only codes were P0335, P0340, P0385, which all point to to crank and cam sensor curcuit, all of which seem to have tested fine. Even used a scan tool not a Tech 2 (loaded with updated software, except for the GM high priced subscriptions) a friend has, but could not get a crank request. Any help would greatly be appreciated. I do have the factory service manuals.
Wednesday, December 1st, 2010 AT 11:00 PM