How do you change thermostat on1988 Chevy truck. Serpentine Tensioner is in the way?

Answer 1

Must loosen the nut that goes through the tensioner. Pop the belt off, and put a wrench on the outside nut of the tensioner, so it will catch something when you torque the inside nut. You should be able to loosen the tensioner enough to get the strap wiggling enough to pop it off the thermostat housing stud.