Yes. They used the exact same engine.
wiil a 1999 blazer engine fit a 2002 blazer
Yes.
An alternator from a 2000 Chevy blazer will fit a 2002 S10 blazer with a little fabrication.
Some parts from any (later) 94 and up will fit.. some parts will only fit from 1998 and up. Engine parts from 1996 - 2002.
Yes
Yes
Yes.
yup
Will fit a 1997 Chevy Blazer
Yes
A 2.0L SOHC SPI engine wil fit any year from 1997 to 2002.
The Vortec Motor hasn't changed sence it came out. it will fit perfectly.