Seattle Metro Operated a large fleet of AMGeneral 10240 buses both diesel and electric coaches. The diesel buses were phased out of service by 1996, and the Trolleybuses were retired in 2003 with their electrical gear being rebuilt and installed in new Gillig bodies.

Diesel coaches 1100-1245 featured raised platform seating and dual stream rear doors. The seats were vinyl and cloth. Coaches 1246-1313 had single stream rear doors and a flat floor with all vinyl seats. The last order, Coaches 1340-1349 were similar except they had 8V71T's and Wheelchair lifts. These coaches were little used by metro, and the lifts were never used in regular service because they were so unreliable. By August of 1991, coaches 1340-1347 were overhauled for use on the Seattle Express, a joint operation with Pierce Transit. The Wheelchair lift was removed, and the coach received Grey carpeted floors, Red upholstered walls, Red seatbacks and burgundy seats. Coaches 1348-1349 joined the first batch by October of 1992. 6 of these buses were sold to Pierce Transit by May of 1995. Pierce Transit retired them in 1999. 

Coach Series	Model	Year In Service	Year Retired	Notes:
900-929, 1009	10240T	1979	1999-2003	1009 ex 911
930-1008	10240T	1979	2002-2003
1100-1245	10240B8	1976	1990-1996	Had platform seating, dual stream rear doors
1246-1313	10240B8	1976	1990-1996	Had standard seating and single stream rear doors
1340-1349	10240B8	1978	1995	Originally equipped with TD&T Wheelchair lifts, all refurbished for the Seattle Express, 6 sold to Pierce Transit in 1995