hey everyone. i have a 97 gmc sonoma 4.3 vortec. yesterday i was driving and it lost power, i couldnt get it over 3 grand. under half throttle it iwas ok anything past that it was nothing, it would wanna die, when this was happening i was waiting for the check engine light to come on so i could have it checked but it never came on, so i pulled into the driveway shut it off, looked things over and it wouldnt start back up, didnt even try to fire. i checked and it has spark, there was fuel pressure at the rail. fuel pump comes on. the oil was a little low so i added oil and still wouldnt start, i know that gmc does have a low oil shutoff. i disconnected the battery for a while connected it again and still no go, just cranks and doesnt even try, does anyone know where i should start. also checked all the fuses and they were all good, and before this happened it ran fine except for hight idle while moving and a little skiping while held at a certain speed