Where is the camshaft position sensor located?

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Truck sputters after 3k rpm, PCode 016 is on, as is the camshaft code. The crankshaft code was on too, but we replaced that yesterday, and found that the sensor itself was actually broken in half. Took about 2 hours to get it out of the hole. New one is in, but still sputtering at 3k RPM. Will replace camshaft sensor if I can find it.