1999 K2500 6.5 turbo diesel VIN F Ext. Cab Long bed
The glow plug relay wires look like they could use some attention. I’d try getting those soldered and fixed and maybe it will bring back the wait to start. Any chance you could get a code reader as well just to insure there isn’t any injection pump codes.Basically everything is new, tank to IP, except the sending unit which looked newer. The sock has been changed too to AC deco.