The following vehicles used the chassis code GMX690
1995-99 Buick Riviera
1995-2003 Oldsmobile Aurora
1997-2005 Buick Park Avenue
1998-2004 Cadillac Seville
2000-05 Buick LeSabre
2000-05 Pontiac Bonneville
2000-05 Cadillac Deville

https://en.m.wikipedia.org/wiki/GM_G_platform_(1995)