Silverado 1500 2WD V6-4.3L VIN X (2004)
6. Reposition the inlet hose clamp at the water outlet.
7. Remove the inlet hose from the water outlet.
8. Remove the water outlet studs.
9. Remove the water outlet.
10. Remove the thermostat.
11. Clean the sealing surface of the water outlet.
12. Clean the sealing surface of the intake manifold.
13. Remove and discard the O-ring seal.
