GMC 2006 Yukon XL Owner's Manual page 29

Bucket Seats (Second Row)
If your vehicle has bucket seats, the seatbacks can be
reclined, and the seats can be flipped and folded for
additional cargo space.
Reclining the Seatbacks
To recline the seatback, do the following:
Regular Model Lever
shown, Extended Model
Lever similar
1. Pull up on the lever
located under the
outboard side of
the seat cushion.
2. Move the seatback to the desired position and
release the lever to lock the seatback in place.
CAUTION:
{
If the seatback is not locked, it could move
forward in a sudden stop or crash. That could
cause injury to the person sitting there.
Always push and pull on the seatback to be
sure it is locked.
Pull up on the lever without applying pressure to the
seatback and the seatback will return to the upright
position. Push and pull on the seatback to make sure
it is locked in place.
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