If it's an actual C&C, in other words the straight 34" frame rails from back of the cab rearwards, unfortunately no. The C&C tank is very narrow in comparison to the regular pickup truck tank, and that's so it will fit between the frame rail and the driveshaft of the narrower C&C frame. Here are the two compared side by side.. regular C3500 tank on left, C&C C3500 tank on right:
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It may not seem at first glance like that drastic of a difference, but they're the same height and length, but the C&C tank is almost half the capacity.
And here's the C&C tank in the frame:
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Richard