Sooo got my truck up on the lift, found these cracks. The spindle will be replaced with an aftermarket one soon, but I need help identifying the steering arm that is cracked in two places so that i can replace it. Been searching through schematics and such but cant identify... any ideas? Thanks everyone

 

It's called a Steering Knuckle Arm(PNC 45611 & 45612). You can find the diagram(below) in the Front Steering Gear & Link section.