How to relace oxygen sensors yourself on a 2004 armada

FIRST OF ALL YOU NEED TO RUN ENGINE FOR 5 MINUTES.BECAUSE ITS HARD TO REMOVE OXYGEN SENSOR WHEN THEY ARE COLD. WEAR LONG SLEEVES AND GLOVES SO YOU WONT GET BURN BY EXHAUST PIPES YOU HAVE TO SAFELY RAISE VECHICLE SECURE ON JACK STANDS.YOU NEED A SLOT SOCKET MADE TO REMOVE OXYGEN SENSOR.YOU CAN IT AT ANY AUTO PARTS PLACES. YOU NEED A 3/8 RATCHET .ALL YOU DO IS DISCONNECT OXYGEN SENSOR WIRE LOOSEN SENSOR WITH THE SLOT SOCKET.REMOVE IT.REPLACE WITH NEW ONE.IF YOU NEED PHOTOS OF SENSORS YOU CAN BUY A HAYNES MANUAL