Pontiac 2005 Aztek Owner's Manual page 118

2. Unlock the slide locks from the two rear floor
retainers by pushing the button down and pressing
them inward.
3. Disengage the front forks from the retainers by
lifting and pulling the assembly toward you.
2-44
Reinstalling the Floor Track Assembly
Before beginning this procedure make sure that nothing
is in the rear of the vehicle.
You will be able to see all four floor retainers (A)
with nothing in the vehicle.