That radio will fit your 1953. It is a Canadian radio and is made adjustable to fit the truck and several cars. However the bezel that you purchased is for the US model, not the Canadian model. I think there may be a metal bezel that goes on the outside of the dash . hopefully someone who has one installed can respond. ere is a link to the GM manual on the radio.
http://chevy.oldcarmanualproject.com/radios/51gmr/51gmrindex.htm I am having trouble with my keyboard, otherwise I would have embedded the link. It is located on the Ã’ld Online Chevy Manuals`site.
