General Motors

Hold lock cylinder sleeve and rotate key clockwise against stop (viewed from key end). Lay a 1/16" drill on housing surface next to housing bore. Drill prevents forcing lock cylinder inward beyond its normal latched position. Insert cylinder into housing bore with key on lock cylinder sleeve aligned to keyway in housing. Rotate knob counterclockwise. Maintain a light push inward on lock cylinder until drive section of lock cylinder mates with sector. Push in until spring latch pops into groove and lock cylinder is secured into housing. Remove 1/16" drill and check freedom of rotation.