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Maybe it got disconnected during the install. If you are running an LS2, then you should have a conversion harness that plugs into the sensor up front in the timing cover. Then it runs to the rear of the motor where it plugs in to the car harness.
Are you getting any codes? Is the car starting and running, when it starts is it having a hard time or turning right over? Just swapped out my cam sensor because of code P0343 coming up, what is it you are hearing?
The good news was the part wasn't all that bad, less than $60, the bad part was its buried under the cowl and the intake had to come off, not all that bad.