[1979 GMC Sierra]

Jonboy, thanks for the info man, i appreciate it. Looking for OEM doors from 77-87 expands my chances of finding doors quicker than if i was looking for 77-80 doors.

motornut, you bring up some good points...i forgot about the glass being thicker in the older doors. I have some vent windows out of a 76 that i was hoping to install in the OEM doors i end up getting...but if i get late 80s doors, the vent window glass from the 76 vent windows will be thicker than the door window glass in the doors. Do you know what year the glass thickness changed ? If i got late 80s doors, could i put my thicker glass from my current 79 doors into the late 80s doors ? Perhaps it would be easier to just stick with my search for OEM doors from the years 77-80...although that really does narrow my chances in finding doors.