Montana AWD V6-3.4L VIN E (2004)
13. Remove the lower intake manifold.
14. Loosen the valve rocker arms and remove the push rods.
15. Remove the lower intake manifold gaskets and seals.
16. Clean the lower intake manifold gasket and seal surfaces on the cylinder heads and the engine block.
17. Clean and inspect the lower intake manifold.
18. If you are replacing the lower intake manifold, remove the ECT sensor.
19. If you are REPLACING the lower intake manifold, remove the thermostat.
Installation Procedure
1. Apply 8 - 12 mm (0.08 - 0.11 inch) bead of RTV Sealer GM P/N 12345739 or equivalent on each ridge where front and rear of the lower intake
