GMC

NOTE: 1 Ton

Year(s)	Engine	Core Size	Rows
1948-54	All	20-3/4 x 19-3/4	4

NOTE: 1/2-3/4 Ton

Year(s)	Engine	Core Size	Rows
1948-54	All	20-3/4 x 19-3/4	3,4

NOTE: 1/2 Ton, 21-3/8" Wide Core

Year(s)	Engine	Core Size	Rows
1955-59	6 Cyl / V8 350	19-7/8 x 21-3/8	3,4

NOTE: 3/4 Ton, 23-1/2" Wide Core

Year(s)	Engine	Core Size	Rows
1955-59	6 Cyl / V8 350	19-1/4 x 23-1/2	3,4

NOTE: Pontiac V8 Engine

Year(s)	Engine	Core Size	Rows
1955-59	V8	22-3/8 x 23-1/2	3,4

NOTE: 1/2- 1 Ton, 21-3/8" Wide Core, 1-1/2" Inlet, 1-3/4" Outlet

Year(s)	Engine	Core Size	Rows
1960-62	All	19-7/8 x 21-3/8	3,4

NOTE: 1/2 Ton, 21-3/8" Wide Core, 1-3/4" Inlet, 2" Outlet

Year(s)	Engine	Core Size	Rows
1960-62	All	19-7/8 x 21-3/8	3,4

NOTE: 3/4 Ton or All Automatic Trans, 1-1/2" Inlet, 1-3/4" Outlet

Year(s)	Engine	Core Size	Rows
1960-62	All	19-1/4 x 23-1/2	3,4

NOTE: 3/4 Ton or All Automatic Trans, 1-3/4" Inlet, 2" Outlet

Year(s)	Engine	Core Size	Rows
1960-62	All	22-3/8 x 23-1/2	3,4

Year(s)	Engine	Core Size	Rows
1963-66	L6 230	17-3/8 x 18-1/2	2,3