The Rio Grande is reported as a little-known and extremely rare offering in 1969. Available on special order, this was essentially a GT in the so-called "Grabber" colors of Wimbledon White, Poppy Red or Calypso Coral, partially blacked-out hood with scoop, side stripes, bed rails, vinyl top and unique "Ford Ranchero Rio Grande" wheel centers. As a result, Rancheros so equipped received Ford's "Special Performance Vehicle" identification on the data plate regardless of engine choice. These vehicles may be identified by the aforementioned designation, as well as a blank space where the trim code would normally be found. Production figures are unclear, but those in the know suggest around 900 total units were built.

With many uncommon features, this Ranchero Rio Grande came from the factory with a 351-cid V-8 engine and is matched to an automatic transmission. Among the highlights are a striped tonneau cover for the bed, Continental-style kit, wide whitewall tires, CB radio with twin antennas, sport mirrors, hood ornament and AM radio.