I purchased a 2000 Grand Cherokee w/ a blown.

Should be able to. GM didn't start that programming nonsense until a few 2002 models. Ford and Chrysler usually don't copy GM's customer-unfriendly ideas until many years later. The Chrysler Engine Computers in that time period can be flashed with updated software but that is only to address emissions-related problems or driveability problems that become known years later, not so you have to spend money at the dealership. They do that so they, (and you) don't have to replace computers like we did in the '80s for those problems.