transmission reverse gear failure on 1995 GMC Jimmy

I started the vehicle like always when i shifted to reverse it wont work

Asked by for the 1995 GMC Jimmy
Check your fluid level with the engine warm and the tranny in park. If that is ok, then you will need to have the transmission fixed, sorry to say. My friend's wife had her Suburban tranny go out in the same way, all of sudden, no reverse, what a shame.