×2! When I put a lift pump on my lly it was loud and always under a heavy load. In the winter around -10 and colder it wouldn't run...(before and after the lift pump). After I installed a beans sump it is so quite and smooth, plus it runs in the cold with no issues. I'm assuming my factory pickup straw was cracked or partially plugged. So if your lift pump is nice and quite I wouldn't add a sump....only if your having issues.I have no sump on my 2011... You only really need one if you need high volume, or the internal pickup is otherwise impaired.
The 1/4 tank problem only happens when there's a large amount of debris in the tank that plugs off the factory screen. I bought my truck used, so I puckered before I got it fired up... I had less than 1/8 of a tank, lol