if you have ever changed spark plugs in a gas engine,then you can handle the glow plugs.
The only thing you have to worry about is if the ends of the plugs have swollen.If they are fine it's a hour job if you take your time
90 Chev 3500 c/c 4x4,6.2na,400 auto,4:10 gears.DSG Timing gears,main girdle, isspro tach, pyro,boost,oil and trany temp.Dual Tstats, High volume peninsular pump,on shelf, Custom turbo and intercooler 85%complete. Change of plans for the dually, it's going to get a Cummins. Both trucks are Blue 90 4x4 crews