energy momentum tensor Definition and 1 Threads

This is probably a stupid question but say I am in Minkowski s-t and I want to find ##T_{ii}##, (Assuming signature ##(+,-,-,-)##), I get : ##(firstterm) + L = T^{ii}## ##T^{ii}## is a vector but ##L## is a scalar (obviously I appreciate for a more complicated metric the vector form will be...