2011 silveraldo
vehicle has no 3rd gear and the speedo will stay at 0 untill about 18 mph then jumps up to there
i know the code P0722 is Output Speed Sensor No Signal
can someone tell me how to test the wires going to the sensor and test the sensor. what the specs should be,
wiring diag would help also.

this is a cam and stalled truck, fyi