Chevrolet 2001 Silverado 1500 Pickup Owner's Manual page 68

There are also anchorage points at the rear base of the
front passenger's seat.
Anchor the top strap to one of these anchor points.
Be sure to use an anchor point located on the same
side of the vehicle as the seating position where the
child restraint will be placed. Raise the head restraint
and route the top strap under it.
Once you have the top strap anchored, you'll be ready
to secure the child restraint itself. Tighten the top
strap when and as the child restraint manufacturer's
instructions say.
Lower Anchorages and Top Tethers for
Children (LATCH System)
Your vehicle may have the LATCH system. If it does,
you'll find anchors in the rear of the seat cushion.
For front passenger seat positions, there is an anchor
behind and to the bottom of the seat to secure the top
strap. For rear center seat positions, there is an anchor
near the driver's side rear seat head restraint.
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