I'm not sure if what Bolter "jimgmc" posted above made sense or not, so to expand on his words a bit and hopefully clear the confusion, the 1937 GMC 1.5 ton (and 2 ton) trucks were identified as model T16. 1937 GMC models T14 (1/2 ton), T15 (3/4 and 1 ton) and T16 (1-1/2 and 2 ton) trucks all shared the same radiator shell and grill assemblies/components as well as hood assemblies and components.*

So I think you can safely say the T16 1-1/2 ton GMC grill will fit your T14. thumbs_up

* My source for this information is an original 1937 GMC T14-T15-T16 Parts List wink

~ Dan
1951 Chevy 3 window 3100
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"My Grandpa Carl's Truck and How it Became Mine"
1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver)
US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)