Pontiac 2001 Montana Owner's Manual page 338

For wheels with a wheel lock key, use the wheel lock
key between the lock nut and folding wrench. The key
is supplied in the front passenger door pocket.
NOTICE:
To help avoid damage to lock nut or wheel lock
key, do not use an impact wrench with this key.
2. Loosen the wheel
--
nuts but do not
--
remove them using
the folding wrench.
(Turn the handle about
180 degrees, then flip
the handle back to the
starting position.
This avoids taking the
wrench off the lug nut
for each turn.)
3. Near each wheel,
there is a notch in
the vehicle's body.
Position the jack
and raise the jack
head until it fits
firmly into the
notch in the
vehicle's frame
nearest the flat tire.
5-25