Buick Lucerne 2010 Owner's Manual page 326

Then, without shutting off the engine, follow these
steps:
See Engine Compartment Overview on page 6 14
for more information on location.
2. Pull out the dipstick and wipe it with a clean rag or
paper towel.
3. Push it back in all the way, wait three seconds,
and then pull it back out again.
6-24
1. For the 3.9L V6 engine,
locate the transmission
fluid dipstick top which
is a round loop with
this symbol.
3.9L V6 Engine
4. Check both sides of the dipstick and read the
lower level. The fluid level must be in the
cross-hatched area.
5. If the fluid level is in the acceptable range, push
the dipstick back in all the way.