Does the pigtail have to replace when fuel pump is replaced on a 1996 Tahoe?

Generally, the pigtail (the wiring harness connector to the fuel pump) on a 1996 Tahoe does not need to be replaced when the fuel pump is replaced, unless it's damaged. If the pigtail is brittle, cracked, shows signs of corrosion, or the connections are loose or damaged, then it should be replaced. Otherwise, it's usually reusable. However, inspect it carefully before reusing. A faulty pigtail can lead to a new fuel pump failing prematurely or causing electrical problems.