Will a 5.3 vortex engine from 2004 Chevy Tahoe fit in a1992 silveroda?

No, a 2004 5.3L Vortec engine from a Chevy Tahoe will not easily fit into a 1992 Silverado. While both are GM trucks, there are significant differences in engine bay dimensions, mounting points, and accessory placement between the two generations. You'd be facing substantial modifications, likely requiring custom fabrication of mounts, wiring harnesses, and possibly even firewall modifications. The cost and complexity of such a swap would likely outweigh the benefits.