Where is the thermostat on a 1999 Chevy S10 pickup?

The Top Radiator Hose, Is Connected To The Radiator Then To The Engine. The Thermostat Is Behine The Thermostat Housing. This Is The Part Where The Top Hose Is Clamped On. Should Be Held On The Engine By Two Bolts. Remove The Hose From Housing, Remove Housing. Get New Thermostat And Gasket & A Small amount Of Silicone Sealant. When You Remove The Thermostat Remember The Direction It Was So You Can Install The New One Correctly +++ Spring Side Toward Engine.