My 1998 2500 Suburban runs great, drives great but when you're at a stop light or in park with the engine running every now and again there's a slight vibration for about a second and then back to normal, it happens frequently when stopped but at random. The injectors have been replaced along with all the other fun stuff (plugs wires etc). I'm at a loss, any suggestions would be greatly appreciated!

 

If it has the crappy plastic body distributor that my '99 Yukon had I would suspect it is worn.

 

awesome, I’ll give it a try