2004 GMC Canyon Owner's Manual - Page 24

Shoulder Belt Height Adjuster Before you begin to drive, move the shoulder belt height adjuster to the height that is right for you. Adjust the height so that the shoulder portion of the belt is centered on your shoulder. The belt should be away from your face and neck, but not falling off your shoulder. To move it up or down, squeeze the release buttons together and move the height adjuster to the desired position. After you move the adjuster to where you want it, try to move it down without squeezing the release buttons to make sure it has locked into position. The lap part of the belt should be worn low and snug on the hips, just touching the thighs. In a crash, this applies force to the strong pelvic bones. And you would be less likely to slide under the lap belt. If you slid under it, the belt would apply force at your abdomen. This could cause serious or even fatal injuries. The shoulder belt should go over the shoulder and across the chest. These parts of the body are best able to take belt restraining forces. The safety belt locks if there is a sudden stop or crash, or if you pull the belt very quickly out of the retractor. 1-18