where is the cheapest place to buy one? because my lines are leaking and i busted the rear brake line so im going to be replacing them this week and i figured i might as well replace it as well.

They are relatively inexpensive at Advance Auto, I would call ahead though they had to order mine. It was 97 dollars.

look for a site tanks to pans $99 IIRC was what I paid for mine last year, you may get one with a gasser pickup sock on it, Diesel tank pickup is different, just swap the sock, look for "snot in my stocking post" for info

If you want a genuine GM unit, try Staff edit to non site vendor removedThey have been very helpful with finding correct parts and seem to be pretty good with 6.5 parts. Prices have been good and shipping has been very reasonable. Phone number is on the website.
Ted