New LS1 Owners - Newbie Tech - Help!! Misfire cylndr 7 code p0307

HEY guys Ive got a check engine light blinking""
I got new spark plugs..put fuel injector cleaner..the wires look good..i put a new coil on cylinder 7...and the code still is popping on...everynow and then it'll say random misfire instead of the cylinder 7...:confused:

replace the coli pack

coil pack sorry or take the injector clip pull it out and reconnect it

Switch coils around and see if the misfire follows the coil pack. Switch that wire also and see if it follows that wire.

Was it misfiring before plugs went in?