Back when I spent 6 months touring the Rockies, Mexico, Alaska and Canada in
my 1984, during what I call my "mid-life walk-about" (six months), I went
over most of the high passes in the Rockies with no engine or vehicular
difficulties.  Got snowed in during an overnight atop, I believe, McClellan
Pass, and a town grader came up and cleared a way down for me - a care taker
on a mountain top several miles away had seen my dilemma and notified the
town below.  I could have hiked down easily - had all the equipment I
needed - but was grateful for the assistance.  The guy wouldn't accept any
payment, but did refer me to a local youth organization where I could make a
donation - They and I were appreciative.
SamC