RepairPal Certified shops can diagnose and repair your 1993 Chevrolet Lumina. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
If your fan is only blowing on the highest setting, then the blower motor resistor may have failed. Try a search on this site to find out what that is. This can be a fairly inexpensive repair, so hopefully that's all it is.
thanks for the help, it took me awhile to find the resister. Had to repair connecter due to corrossin but now its working