I already posted this in a different section, but I think it was the wrong one.
Please forgive the re-post.

Bought the Deville not running.
here are the "history" codes (after sitting 2 weeks w/o a battery)
p0204
p0603
p1133
u1096
u1088
u1064
Plus about 20 "b" codes

She cranks and has fuel pressure (checked at the shrader valve)
Has been parked for several months (not wanting to start)indoors before I made her my own.

I know no other history of the car. I am very mechanically inclined, just wanted to get some ideas of where to start with the Northstar. have had a northstar powered car before, but just have not ever had to work onone.
I am very efficient with GM's in general.

Will not start... any suggestions?

Hello ron, i am not sure about your codes but somethings to check are the negative and positive battery cables and there connections. The ignition systemconsist of several items you can check, theignition switch, elctrionic ignition modual, the coils, spark plug wires, spark plugs and the battery are the ignitions system. Also you stated it has been sitting for several months, the fuel system may have water in it and that will cause it not to start as well.

Battery terminals and cable connections are clean. (battery is new)
I can not get to it this weekend, but will pull the plugs and check other connections during the week.
Thanks!