Here's a new find on # of turn signal flashes that I think some asked about:
SCCM
724-01-01 xxxx x*xx xx:
0,1,2,3=1 flash
4,5= 2 flashes
6,7= 3 flashes
8,9= 4 flashes
A,B= 5 flashes
C,D = 6 flashes
E,F= 7 flashes
The truck will add 2 flashes to any of the above values when a trailer is connected.