Hate this being my first post but I am stumped. My 08 WT Silverados blower motor started acting erratic on off on the other day so started researching and everything seemed to point at the resistor..got a new one..no go..then pointed to the fan control..got one...no go..so then thought may as well try a new blower..did that as well and still nothing..anyone have any thoughts..gotta have heat

 

check for battery voltage to the motor with the key in run