The Denso AC unit is pretty stout. But most service manuals and most parts stores do not list a replacement clutch.
It isn't just that simple to replace.
I have a spare Denso unit that needs a clutch and that is all - and I won't even touch it!
Since the Chevy Pick Up all uses the same compressor, it is cheaper to replace it with a used compressor or buy a new one.
Some technicians has told me that a new GM clutch is as much as $250, and the whole unit is $350 out of the Chevrolet Garage = with a guarantee.
It wouldn't make much sense to change it - even if you could!