How do you change an idler arm on a 1998 GMC Safari Van?

To change the idler arm on a 1998 GMC Safari Van, first, ensure the vehicle is securely lifted and supported on jack stands. Remove the nut and bolt securing the idler arm to the frame and the pitman arm. Replace the old idler arm with a new one, tightening the fasteners to the manufacturer's specifications. Finally, recheck the alignment, as replacing the idler arm can affect steering geometry.