CTS V6-3.2L VIN N (2003)
Installation Procedure
1. Assembly the intake plenum if necessary.
2. Remove the masking from the intake plenum ports and ensure the sealing surfaces are clean and dry.
3. Lightly coat the intake plenum O-ring seals with clean engine oil and install to the intake manifold.
4. Position the intake plenum to the intake manifold, aligning the pins.
Notice:
Refer to Fastener Notice in Service Precautions.
See: Engine, Cooling and Exhaust/Service Precautions/Vehicle Damage Warnings/Fastener Notice
5. Install the intake plenum bolts.
Tighten the intake plenum bolts to 20 Nm (15 ft. lbs.).
6. Install the intake plenum bolt caps.
7. Install the 2 bolts securing the ECM bracket to the intake plenum.
Tighten the ECM bracket bolts to 8 Nm (71 inch lbs.) in sequence 2-3.
