Where is the thermostat located on a 1996 Oldsmobile Cutlass Supreme?

follow the top radiator hose back to the engine, it should be right under the hose connection

follow the top radiator hose back to the engine, it should be right under the hose connection

on the 3100 V6,

It is buried literally under the throttle body, behind the heater pipe (pipe from the water pump area, across and then back toward the firewall. 2 small nipples carry hot water to TB.)