Do you have a lifted Colorado or Canyon and are trying to clear larger tires? By adding Badland Industries Ball Joint Spacer you can relieve excessive ball joint stress when lifting your truck two to three inches. It also allows the upper control arm more freedom of movement and greater articulation of the suspension. Adding the ball joint spacer improves the upper ball joint angle, extending ball joint life by putting less stress on the ball joint boot. All of our ball joint spacers are precision machined design, and include grade 10.9 fasteners. We carry both z71 3 bolt style and z85 2wd 4 bolt style. 1 kit comes complete with 2 spacers and hardware. 1 kit =1 truck 
Installation video can be found here (5.30):
https://youtu.be/xSQD8PfwVfo