Hi my names chris and i have a 2003 silverado and ive been having issues with my 4wd system the service 4wd light comes on every time a start the truck but ive replaced all the components in the system except the encoder ring but i have a code for a bad ground to the actuator ive cleaned the ground points under the truck on the driver side and still nothings changed im stuck in 2 hi and even with the new selector switch it doesn’t light up all the time

I will when i get the scanner again i had to barrow it