Pontiac None Aztek Owner's Manual page 63

If you're using a top strap-equipped child restraint in the
center rear seat and need to temporarily transport a
flat tire for repair, move the child restraint to a rear seat
outboard position. See Securing a Child Restraint in
a Rear Outside Seat Position on page 1-54 for more on
this, including important safety information.
Be sure to follow the instructions that came with the
child restraint. Secure the child in the child restraint
when and as the instructions say.
1. Make the belt as long as possible by tilting the latch
plate and pulling it along the belt.
2. Put the restraint on the seat.
3. Run the vehicle's safety belt through or around the
restraint. The child restraint instructions will show
you how.
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