Will a cluster from a 1998 cavalier w/tach, bolt right into a 2000 cavalier w/o tach?

im not sure about a 2000 but i think 95-99 im not sure of anything tho just trying to help hopefully someone will be able to tell ya

No

95-97 will Work interchangible, the 98-99 with digital will only work in digital 98-99 vehicles, the mechanical ones are interchangeable with 95-97. And in the 96-99 mechanical ones be wary that the 95 cluster does odd things with your DRL's. Also 95-99 Cavalier clusters are not interchangable with the sunfire without some modifications. 2000-2004? Are interchangable among themselves. (Both sunfire and cavaliers I believe) but will not accept the 95-99 ones