I am trying to track down a possible vacuum issue. I have no HVAC
control and understand it is operated by vacuum.
I found what looks to be a vacuum line disconnected on the driver side
of the motor but can not find where it goes.

2000 Blazer with Kumho tires that are two years old and have 50% of
tread per my local tire place.  Snow traction is absolutely horrible
for stopping and turns, I have to slow down to a near stop to take a
curve on the backroads.  I know it was a year ago, but it has never