Trailblazer dvd has audio but no display on monitor of dvd 2004 trailblazer lt

SOURCE: dvd no sound but shows picture

try a dvd cleaner

SOURCE: low oil preasure stop engine message displayed on

I havent encountered it. However, I highly recommend you do not drive this car. Low oil pressure can do permanent damage to the engine. It sounds like your oil pump is bad. However, if debris managed to get inside your engine it could have damaged the piston walls causing this to happen as well.

I hate to say it, but unless you are a very skilled mec hanic this is a job for the dealership.