Really easy. It just screws right in. Could just use a cressent wrench. Standing in front of the front bumper it is on the right hand (driver) front part of your lower intake. I its a single red wire. It is by an injecter and one of the lower intake bolts.
Also make sure the sender wire did not come off the sending unit or break along its run.
If wanting to be even cheaper, a new sender is 4 bucks and change at the parts store.
Good luck.