:banghead: Which is the specific problem of the Blazer 95 that shuts off sudden when it is running?
I have read that the cause is in the ignition switch.
Is the harness of the switch wired or the device where the key goes?

April 19 2006
Thank you for your helps BlazerLT. I changed the ignition module. In this model Blazer 1995 the ignition module is located in the base of the coil, mounted on heat dissipate. Up to now the vehicle has worked well. I will count you if there is some novelty in the operation or if it is presented the problem again.

I will put a picture where I asked the initial question in the page of automotive forums.
http://img107.imageshack.us/img107/1129/modulodeignicionblazer24od.jpg (http://imageshack.us)