Gary is correct. There is no factory pinstripe on Sport Tracs. If you have a pinstripe, it was either added by the dealer or the previous owner.
In either case, it may not be a tape stripe, it may be painted on. I know a local pinstriper that visites a number of dealers in the area and pinstripes about a dozen new vehicles and the dealer charges and additional $150 for the pinstripes.
If the stripes are tape, they will have a straight, blunt cut at the door gaps or may even be wrapped around the door edges. These stripes can be just pulled off but beware that some tape pinstripes will leave a visable groove in the paint after they have been on a few years.
If they are painted stripes, they will have slightly rounded edges to the stripe at teh door gaps where the brush was lifted. Most pinstripes are done with enamel paint and can be removed with enamal reducer. You should test the enamal reducer on an inconspicuous spot under the hood just to make sure it does not disolve your paint. It should not harm your paint since it is urythane based and enamal reducer will remove the enamal without touching your factory paint.
...Rich