96 GMC 6.5; 275K

Love my truck, but don't drive it much anymore. Last few times I took it out it would occasionally skip (kick - sputter) but only on deceleration. Seems to do it more when I accelerate hard then let of the throttle.

If I put it in N and coast, it quits. If I give it a little throttle it quits.

Doesn't skip at idle, or during acceleration (still has good power).

PCM going maybe? It's been several years since I replaced it, although it's on a heat block.

Any suggestions as to where I should start? Never had this before . . . . I'm at a loss . . . .