2010 Chevy Tahoe trouble codes

I just installed E3 spark plugs in my 2010 tahoe 5.3 motor. The plugs where the only change that I made. I turned the car on and it ran rough. The DIC gave me service stabilitrack and service traction control. I got trouble codes P0300 and P3400 when I plugged my reader into the obd port. Which is miss fire and and bank 1 shutdown I believe. The idle is running really rough. I pulled and reinstalled all the plugs torquing to specs. What would cause the problem of miss fire after just changing the plugs