Not without modification as 2000 is the newer body style which was implemented in 1999.
1994 Chevy fenders fit a 2000 Chevy
YES they will bolt right in.
Can a extended cab 2000 ford ranger seats fit in a regular cab 1994 ranger
no, unless the 2000 suburban was really a 1999.5. If the body style is different they will not fit
yes
YES, The cabs are the same.
YES
NO
will a 2004 tailgate fit a 2006 Chevy
It will if it is for a truck.
Yes same engine.
of'course