I have come across a mention that the Pickups and Blazers sold to the military as early as 1984 had a central tire inflation system (CTIS) available. I found the on-line version of the Army's shop manual (at www.motormayhem.com) for the CUCV but it had no mention of the CTIS.

Any information anyone could provide, even anecdotal would be useful.

Thanx in advance, Dr. Lee