My LATCH manual is 2009, so assuming there are no changes from 09-10:
Expedition:
2nd Row - 3 sets of LATCH for the bench seat, or 2 sets of LATCH & tether anchors for the captain's chairs. Tether anchors are at the bottom of the seat back.
3rd Row - One tether anchor in the center seat back, no LATCH
Sequoia:
2nd Row - 3 sets of LATCH, tether anchors on back of seat
3rd Row - One tether anchor on back of center seat, no LATCH
Tahoe:
2nd Row Bench seat- LATCH in the center and passenger side only. Driver's side does have a tether anchor. All are on the bottom of the seat.
2nd Row Captain's chairs- Both haveLATCH and tether at the bottom of the seatback.
3rd row 2 seat model - no LATCH, one tether anchor that can be used for either seat on bottom rear of seat.
3rd row 3 seat model - no LATCH, one tether anchor on the driver's side that can be used for either center or driver's outboard.
Hope that helps!