2004 tahoe z71 passenger side motor has no spark on any cylinder new coild wires plug

[chucky412]

my tahoe has no spark to none of the cylinders on the passenger side of the engine anyone have any idea of what would cause it has 4 new coils even swapt them to driver side and still no spark on passenger side on the motor any help would work > was running fine then it lost power and would not move much