Help With Dtc!!!

[molotovman]

P0356 ignition coil "F" primary/secondary circuit
i have switched coils and wire and it reads the same code, it has a misfire what else can i do to try and fix it. 2001 5.3L Tahoe LT, 108K, 4X4

 

[Sepiroth]

Assuming you checked the third cylinder on the passenger side of the engine block, found the specs for resistance, measured the resistance from B positive to the coil and ground to B positive, and all were in spec, I would then turn towards the spark plug.