^^^ Agreed with all of that ^^^

But I do wish to add that if you are NOT comfortable doing this yourself and go to take it to a shop. Do NOT under ANY circumstances allow them to "FLUSH" the tranny. As this will cause it to fail completely. Lots of info as to why, ask or search if you want to know why. But more or less... Pan drop, replace filter, refill with dexron fluid (consult manual for dex3 or dex6... 05 is a oddball year, could go either way).