What is the stock horsepower for five point seven liter V8 Vortecs from 88-99?

HP for 97 GMC Sierra 5.7L VortecAccording to autos.msn.com, it's 255hp @ 4600 RPM for an 97 (which I own).

http://autos.msn.com/research/vip/spec_engines.aspx?year=1997&make=GMC&model=Sierra%20C/K%203500&trimid=-1#EngineSpecs

True, but Vortec engines were not introduced in GM trucks until 1995. 1988-1994 were standard 5.7 TBI engines at approx. 210hp

Actually the 5.7 didn't come out until 1996. The vortec in 1995 was only the 4.3 for the sierras.

Well I know for a fact that the later 1995 Sierras had a Vortec 5.7 option... I own one.