Where on the GM 350 Vortec engine would you find the camshaft positioning sensor?
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