Buick RIVIERA 1993 Manual page 209

Put the flat end into the
notch and carefully pry
off the small cover.
Remove the lock nut
by inserting the key
,
wrench into the ,hole
in
the: center of the wheel
'I'
,cover and turn
it
q1ockwis.e to loosen the
lock nut completely.
i
1
i
"
,,.
If your Buick has aluminum wheels, there are no wheel
covers that have to be removed.
Now you are ready to start using the jack and wheel
wrench to raise your vehicle. Using the wheel wrench,
loosen all the wheel nuts. Don't remove them yet.
207