Where is the camshaft position sensor located on a 1997 Chevrolet K 3500?

Inside the timing chain cover there is a crank position sprocket and a sensor that connects into the side of the timing chain cover. There is also a sensor in the distributor(this is the camshaft position sensor). The connector faces the firewall. To setup your timing you have to rotate the distributor to 0 deg or you will get a P1345 code. A timing light won't help. If you don't have the right equipment you need to take it to the dealer or keep adjusting the distributor until the code goes away. Jon