For those who want to use a factory style GM aux. engine oil cooler like this, you will most likely need to replace the seals and gaskets in both the lines and the engine oil pad adpater block so you need to pick up a Fel-Pro #ES72671 from your neighborhood parts store-it has what you need for both the V8 and V6 engines....it's about $10 or so....but you no want any oil leaky leaky in your driveway!
This set was donated by a generous 1990 Suburban chillin out in one of my favorite boneyards. It mounts on the trucks just like it did in the Burb...easy-peasy.
Soon I'll have the trans cooler w/fan that the same Burban also kindly gave up...pics coming soon on that one.