1997 luminia replace fuel tank need help now

Ok the internet sometimes sucks. To many answers to a question and there all differnt, My 1997 luminia 3.6 v6 there is no question I need to replace the fuel tank. My problem is I look at the owners manual that came with the car it says the tank is 16.1 gallons. Online things say 16.6 to 17.0 I looked to order the tank and there are 2 or 3 differant ones shown ranging from 16.0 to 17 I just need to know I guess if I get a 17 gallon will it fit or not?

My 1997 luminia 3.6 v6
You have a 3.6L engine? Not a 3.1L?


I look at the owners manual that came with the car it says the tank is 16.1 gallons. Online things say 16.6 to 17.0 I looked to order the tank and there are 2 or 3 differant ones shown ranging from 16.0 to 17 I just need to know I guess if I get a 17 gallon will it fit or not?
Links to the various tank options you're looking at?

I'd have said the difference is in how the capacity is measured; and maybe in the tank fittings for vents and outlets. Perhaps a Federal vs. California emissions thing.

All my GM cars will accept more than their "rated" capacity. Rated capacity seems to be on the low side.