Will a trans from 1995 Chevy Suburban fit 1992 1500 pickup?

No, a transmission from a 1995 Chevy Suburban will almost certainly not fit a 1992 Chevy 1500 pickup. While both are GM trucks, there were significant differences in transmissions used across those years and models. The bolt patterns, input shafts, output shafts, and even the overall case dimensions would likely be incompatible. You'd need to find a transmission specifically designed for a 1992 Chevy 1500 pickup.