GMC 2000 Sierra - Manual (Page 211)

yellow blue
4-15
The following steps must be performed on each of the
push
- pins to remove the air dam:
1. Insert the blade portion
of a flat - blade
screwdriver into the
push
- pin slot and pull
downward until the
push
- pin snaps loose.
2. While continuing to pull
downward on the
push
- pin, squeeze and
rotate the expandable
end of the push
- pin
with a pair of pliers
until it releases from
the retainer.