Chevrolet 2005 Uplander Owner's Manual page 78

2. Unlatch the harness by pushing the button on the
buckle.
3. Move one side of the harness off the child's
shoulder.
4. Move the other side of the harness off the child's
shoulder.
5. Remove the child from the child restraint cushion.
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Storing the Built-In Child Restraint
Always properly store the built-in child restraint before
using the vehicle's lap-shoulder belt.
1. Move both latch plates and both sides of the
shoulder harness clip to the bottom of the
harness straps.