I'm pretty sure I have the 1" one. Did the thicker one bolt right in?
I'm sure there is am acdelco equivalent to the radiator I posted. Probably just have to cross reference part numbers.
Here is the one on the 454 trucks. There are some for the HD trucks that are 34x
20x2ish that I believe may be too tall for the 1500 trucks. The one I installed is Height: 34-1/16 In.,Width: 17-1/4 In.,Thickness: 2-3/16
GM GENUINE 20905 {#52478818}
Info
Trans. code 4L80-E; 4.10 Rear Axle Ratio (GT5), Engine Oil Cooling System (KC4), Heavy Duty Radiator & Transmission Oil Cooler (V02); CORE SIZE 34INX17 1/4INX2 1/8 IN CODE PW, L8,SP,PA,PB,PD,PX,NF,NJ,05, L2, L3, L4, L7,Transmission Oil Cooler; 4 Speed Automatic Trans.
https://www.rockauto.com/en/catalog...,7.4l+v8,1031308,cooling+system,radiator,2172
