Intake Plenum Installation

Lightly coat the intake plenum O-rings with engine oil.
Install the O-ring seals and intake plenum.
NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
Install the intake plenum bolts.
Tighten

Tighten the intake plenum bolts to 20 N.m (15 lb ft).
Install the intake plenum bolt caps.

Fig 1: Installing O-Ring Seals, Bolts & Intake Plenum
Courtesy of GENERAL MOTORS CORP.
Install the crankcase ventilation tube adapter.
Install the crankcase ventilation tube adapter bolt.
Tighten

Tighten the crankcase ventilation tube adapter bolts to 8 N.m (71 lb in).
Install the vacuum lines to the crankcase vent tube adapter.

Fig 2: Installing Crankcase Ventilation Tube Adapter & Bolts
Courtesy of GENERAL MOTORS CORP.
Install the ECM bracket.
Install the ECM bracket bolts.
Tighten
- Tighten the ECM bracket bolts to the intake manifold plenum to 8 N.m (71 lb in).
- Tighten the ECM bracket bolt to the cylinder head to 20 N.m (15 lb ft).
  
  Fig 3: Installing ECM Bracket & Bolts
  Courtesy of GENERAL MOTORS CORP.
Install the ECM.
Install the ECM nuts.
Tighten

Tighten the ECM nuts to 8 N.m (71 lb in).

Fig 4: Installing ECM & Retaining Nuts
Courtesy of GENERAL MOTORS CORP.
Lightly coat the throttle body O-rings with clean engine oil.
Install the throttle body with O-rings.
Install the throttle body bolts.
Tighten

Tighten the throttle body bolts to 8 N.m (71 lb in).

Fig 5: Installing Throttle Body
Courtesy of GENERAL MOTORS CORP.