if its double roller you'll have to live with it they are noisey no matter what you do
only real option is to got stock style chain with GM tentioner or let it tick
as the cam bounces back and forth the cam sensor gets kicked back and forth also but worse is it back and forth at the gear which is angled so it pushes the shaft if the cam sensor up and down.
if you shim the sensor with less play in it it may get quieter