* Pitman Arm: This is attached to the steering gearbox (located near the firewall). It's a short arm that receives the rotational motion from the steering box and converts it to linear motion.
* Idler Arm: This is located on the passenger side (right side) of the vehicle, midway between the steering gearbox and the center link. It acts as a pivot point for the center link, allowing it to move up and down as the steering wheel is turned.
To locate them specifically, you'll need to look underneath the truck, focusing on the area directly below the steering wheel and the passenger-side front suspension. They are metal arms and relatively easy to spot once you're looking in the right area. A repair manual or online diagrams for your specific model year Silverado will be extremely helpful in visualizing their exact position. Be cautious when working underneath your truck; always properly support it on jack stands.