Can you buy charcoal and where for apurge canister for a 2005 buick lacrosse 3.8L

Question edited for clarity.
Question moved to sub category.

Likely to be the Throttle Position Sensor but you need a scan tool to diagnose..

https://www.google.com/search?q=2005+Buick+Lacrosse+TPS

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Hello. You can go online to eBay to find a PCM for your Buick LaCrosse. Include the year, make, model and V.I.N. information to ensure you order the correct PCM. Good luck and keep me informed; if you want to.

Remove the plastic cover off top of engine . purge valve solenoid under it.

Evaporative Emission (EVAP) Canister Purge Solenoid Valve
Top rear of the engine, on the intake manifold, near the fuel injectors. If you don't know what it looks like google part to see a picture .

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.

Here is a link that will show you how to
Tail Light Change 2005 2009 Buick LaCrosse 2006 Buick LaCrosse CX 3 8L V6

Take it to a qualified repair shop or auto parts store that checks codes for free or buy a scan tool . Buy a service manual or subscribe to alldata diyer repair info .$20 for a year .
ALLDATAdiy com Easy To Use Repair Information

An Alignment shop can adjust it,

There is a rear suspension offset toe link
bolt avail for around $ 12.00 ea

Google--- 2005 buick lacrosse rear toe out adjustment

I own a 2007 Buick Lacrosse, but I imported it to Paraguay, South America. Now I bought a new Engine Start Keyless Entry Remote from Amazon, but here we do not have any GM dealer to program the unit.
I really need help to program the keyless remote control, I will appreciate very much your help.

Both my remotes no longer work. I will be ordering new ones off Ebay and having my dealer program them. New ones from Buick are very pricey.

Should be the vent box for the charcoal canister.
Your fuel tank has a vent line. This runs to the charcoal canister, then to that vent box.