My car stop running. Took it to a mechanic, had to put a new engine. The day I took it out of the mechanic, on the first stop light, the car stop running again.

Hi Meelosu, obviously with big jobs like this, costs are painful... Here is my advice, either the shop really messed things up or you're terribly unlucky. You and I, don't know the truth. Find another shop locally, and consider towing it to them. I find it rather strange that the car dies immediately after picking it up, do you know if they test drove it at all? Not sure why they said don't run the AC? By new engine, do you mean factory NEW, rebuilt, or a used engine? Also please describe your issue with the vehicle the first time, why did they recommend a new engine, what happened, what was their diagnosis, and also more details of "stopped running." The second time? Just dies while idling at the light? Did it start immediately after you cranked again? I am a shop owner, if car dies after a new engine, I'd ask you to come immediately back...

Sorry, the purpose of towing to the other shop is to have them review the engine, and the current diagnosis, just let them diagnose it from scratch. This can sometimes be a pain for another shop (please realize this) especially if they didn't do a great job with the engine install.

omg- you are tangled in a waking nightmare- cut your losses, and get another car- the Saturn is an extinct car, anyway-

Hope you got money back for your first transmission that went out, it has been recalled by GM and they reimburse any tranny work you had done to it.

Body control module.

If when putting in engine if torqe converted wasn't fully seated will blow transmission, bad conection to tcm module on trans