will a 1994 chevy 1500 bench seat fit into a 1988 chevy 1500 truck

It should be a direct bolt in. Both trucks are fourth generation (1988-2000).

So long as they are the same body style truck. Some of the older square body style carried over into 88 such as the blazer and suburban. But if you are dealing with the same body style truck then there is no difference and it will bolt right in.

Would a 2001 chevy truck bench set fit my 1973 gmc 1500