Silverado 1500 2WD V6-4.3L (2007)
5. Install the spark plugs.
6. Position the exhaust manifold heat shield to the manifold and install the bolts.
Tighten the bolts to 9 N.m (80 lb in).
7. Raise and support the vehicle.
8. Install the catalytic converter to exhaust manifold nuts (1).
Tighten the nuts to 50 N.m (37 lb ft).
9. Lower the vehicle.