technically it's a 47 sold in 48 1/2 ton 5 window gmc 100, advanced design.
I apologize for stating 1st series. that may be misleading.
I could be wrong, but I think any smaller truck 47-53 will fit the bill. unsure about 54 and 55 1st
Last edited by rmw667; 01/05/2018 3:16 PM.
