Is an 25L s10 engine the same motor as 1989 Chevy Celebrity 2.5L engine?

No, a 2.5L S10 engine and a 1989 Chevy Celebrity 2.5L engine are not the same. While both are 2.5L engines, they are different designs and likely won't have interchangeable parts. The S10 used an inline-4, while the Celebrity likely used a V6. Even if both were inline-4s (which is unlikely given the year), the specifics of the block, heads, and internals would differ significantly.