Pontiac 2000 Bonneville Owner's Manual page 271

Start the nut cap by pushing it onto the lug nut with
the wheel wrench. Tighten the nut caps snug using
the wheel wrench. Then continue tightening
-
one quarter turn. Do not overtighten.
5-28
When reinstalling
the full plastic wheel
cover, align the
valve stem with
the opening.
Then continue tightening one
-
plastic caps, or one eighth turn for steel caps.
Do not overtighten.
When reinstalling
the nut caps on
aluminum wheels,
tighten the caps
snug with the
wheel wrench.
-
quarter turn for