1995 yukon runs rough

you should run a scan on the engine. most auto parts stores do this for free. but check your fuel pressure if it's below 55 it may be to low. But if it's low around 55 then change your fuel filter. also get a can of choke cleaner and clean the throttle plate on both sides andthe oblong hole next to it. the engine may start hardafter doing this however. make sure to hook up air duct after doing this or it wont' run right. then take choke cleaner andspray edges of intake checking for vacuum leaks if it still runs rough. but getengine scanned......

thanks hmac300, Just an update, as maybe it will help someone else,
Dropped fuel tank, problem was obvious, the lines on the sending unit were rusted to less than half there normal diameter and pin holes were present. I was able to snap the metal (rusted) lines in half with two fingers. Bad news. the entire fuel line looks the same. This is a vehicle that still looks like new on the outside. not the first hint of rust. I was shocked. Thanks again