Hello all i have an 07 pontiac that im trying to install a nex 8100 i have the rp5gm11 interface but i cant figure out where to put the pink wire car speed input do i need to hook it up with the rp5gm11 thanks for all ur help Bob

i connected my cars vss to the harness's vss

My 06 gm has the vss wire in the smaller connector to oem radio.