2005 Chevy K1500 4x4 crew cab AC 134 capacity???

[Summajet]

V8 non flex fuel 5.3L 4x4 crew cab with digital climate control.
Does anyone know what the capacity is for AC R134 in this truck with rear
and without rear ac??
Thanks!

 

[ks03]

One of the decals on the cover of the radiator support normally has that information. 1.6lbs if you believe this random pic

 

[Summajet]

My sticker on top of the radiator is not readable.
Thanks