Gas...not entirely true... it is possible.. Chevy made both the high cab and the low cab in 36..
The high cab was made for the first half of the year.. then they switched over to the low cab...
A 36 high cab is kinda sought after by guys workin on 34-35 cabs because the doors are all steel.. unlinke the 34-35 doors which are framed in wood..
but will a 36 low cab door fit on a high cab .. no..