If it has the same engine, then damn near everything. they have the same frame, tranny, running gear... almost the same car with a slightly different body.
Yes, some will be.
The GP was redesigned in 2004 so parts are only interchangeable with 2004 or later. 99-2003 wont work.
1997-2003
1997 - 2003
Not likelyNot likely
Yes
the interchangeable parts where invented in 1798.
The 3800L is a common engine among the w-body GM's. The 94 is a Series 1, and is interchangeable with most other 3800 s1. 95 + are branded with "Series II" on the engine, and are not compatible. Keep in mind however, that many parts are still interchangeable.
Many parts are interchangeable between a 1992 and 1995 Honda Civic, but always consult a qualified automotive mechanic before trying to use these parts.
interchangeable parts are used in factories
Suzuki and Peugeot do not share parts. 4-cylinder Grand Vitaras built before 2006 have some interchangeable parts with Chevrolet Tracker vehicles, because Suzuki was building them for General Motors.
Interchangeable is an adjective; parts is a noun.