Just purchased my 77 (my first blazer) two weeks ago and found this site a few days ago. I just did a search on the forum as i had questions regarding the transfer case and the hiloc, high, low loc low etc. I did not quite understand since i am a newbie. Well had a four wheel drive some 17 years ago when is was single and full of venom (those were the days) Anyway i searched and just copied to word some 7 pages of posts regarding this question. This is simply a killer site. I can see i will probably be spending a lot of time learning from you all. Thanks all from sunny so cal.