What are the 5 holes on our buick 2005 lacrosse dip stick mean ?

1. Turn off engine ,
2. Take of oil cap on engine
3. Put in a little oil in oil filler hole of engine.
4. then pull out the oil dip stick from engine
5. and clean the dip stick on a rag.
6. Put dip stick back in engine
7. pull out again and check the level showing on the dip Stick
8. If level is too low on dip stick and is not at full level go back to step 1

These steps ensures you avoid over filling the engine with oil

Tip for beginners
The 4 litre oil bottle is way too much oil for an engine to handle.
If you have a full 4 litre oil plastic bottle square shape . hold the bottle on its side to pour the oil out slowly and smoothly.

Door Lock Mechanism Sticks : Buick LaCrosse Common ...

repairpal.com > Problems > Buick > LaCrosse
Door lock mechanism not operating properly on Buick LaCrosse. Door lockmechanisms ... problem details. 2005 Buick LaCrosse126,000Visitor .... door panel to repair? Lock will neither lock or unlock using key fob but does work manually.

i think you mean
when running the engine
the DIP STICK seal as it fits the dip stick tube end. leaks oil
this a bad PCV valve.
excess crank case pressures.... cause by not doing service on car.
or worse a very worn out engine with huge blow by gassed.
is engine miles high? over 300k? miles?
or the dips stick seal there is bad.... looking at it tells you that.

most cars this is in the operators guide(glovebox) lost?
sure.
bet one at Buick. free.
3rd google hit.
and
http://www.vadengmpp.com/owners-manual/buick/2005-Buick-Lacrosse.pdf

page 5-92

nor more guessing its there. always was...

Check the sending unit for the oil then check the oil pump. I bet on the oil pump being bad.

WELL BUICK LACROSSE HAVE TIMING CHAIN.THE SERVICE SCHEDULES MAINTENANCE DONT GIVE NO TIME CHANGE.I SEEN TIMING CHAINS LAST OVER 100000 MILES OR MORE.IF YOU NOT A HARD DRIVER.TIMING STILL GOOD.CHAIN OKAY IF YOU HEAR CHAIN NOISES OR YOU NEED TO REPAIR FRONT TIMING COVER SEAL THEN REPLACE TIMING CHAIN.YOU BE THE JUDGE.IM NOT GOING TO TELL YOU NO OR YES.IF YOU GOT THE MONEY.WOULDNT HURT NOTHING.JUST THE COST AND LABOR..

The good practice is to change the oil every 3,000 miles...but what really dictates this is what type of driving condition you are incurring.

If you drive all highway miles then an oil change between 1,500 and 3,000 miles is highly encouraged.

Dirty/dusty conditions....definitely around 1,500 to 2,000 miles.

The average for tranny fluid/filter changes goes from the additional 60-90,000 mile mark and then every 50,000-60,000 miles after that....it is shortened by heavy duty and dirty/dusty conditions.

Locate the switch under the hood and clean all the connections

No a Plugged fuel filter would not cause more fuel consumption but would lead to damage to the injectors and the fuel pump, and is much cheeper than the fuel pump or injectors. And I believe you mean Flex plate broke? And I do believe you should check with the dealer this unit should have a 100,000 drive train warrenty and they should kick in on the transmisson.

The power steering reservoir on 3800 V6-equipped vehicles is located behind and below the rear cylinder head.
With the engine off unscrew the resevior cap and remove the cap wipe the dip stick with a clean cloth(paper towel) and re-install. remove once more and check the level on the dipstick. and then reinstall turn till it stops