JayCee - As I did a bit of digging to offer some info on your "generator question" in the Electrical Bay, I went ahead and did some decoding of your pictured data plate to help ID your truck. The decoding, done with the help of this Old GMC resource web page, breaks down as follows for your ID "253-24 S Z1121"

25 = 1 Ton
3 = 137" wheel base
24 = 248 engine
S = Built at the St. Louis, MO plant
Z = 1954 Model year
1121 = 120th 1 Ton off the St. Louis line for 1954

Hope this info is of some help. 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)