Sierra 3500 2WD V8-6.6L DSL Turbo VIN 2 (2004)
10. If necessary, remove the intake manifold tube.
11. If necessary, remove and discard the 2 O-ring seals from the tube.
12. Clean the gasket surfaces of the exhaust gas recirculation (EGR) cooler tube, intake manifold tube and inlet tube.
Installation Procedure
1. If necessary, install NEW O-ring seals onto the tube.
2. If necessary, install the intake manifold tube.
