1995 GMC C1500 1995 GMC 1500 5.0L

My 95 has just started dying about a week ago.
No check engine light comes on. It seems to do it more at slower speeds, It will start up after it dies. I drove it last week, and it died about 1500 rpms, almost like someone just shut it off. Sometimes if you give it gas it will come out of it.

I tuned it up about 4 months ago, and replaced the fuel filter a couple of days ago, but the problem has returned.