well guys still no fix, my 2014 silverado was towed in for the 2nd time in 6 days
my service dept tech found one of the battery grounds going to the frame had undercoat under the cable, cleaned that off & it started right up. drove it home,
the next morning well you guessed it, no start no crank. the gm smart guys gave us a part # for a completly different starter,i should have this part by friday. if this works i will post the pt# for this new & improved starter. kinda bad when you work for a chevy dealer & your new truck keeps being towed to work every day !