Run away from Detroit, don't walk
I'd stay away from any company automotive related, including the "Big 2"; DaimlerChrysler does not have a US flight department anymore; Pentastar, out at Pontiac (PTK) would be your best bet for non-freight flying in the area, they are not connected with DC, and the Ford that owns it is not tied into the Motor Company anymore. I believe Little Caesars uses Pentastar for crews on the GII (if they still have it???), the DC9-50 (Tiger's and Red Wing's) is operated by Guardian Ind. out of DTW, and they also fly their own DC9-30 (Piston's). ADI, also at PTK, own a F28-4000 on a 121 certificate; plus they do some management work so I'd stop in there too.