Removal Procedure
Note: The intake manifold, throttle body, fuel rail, and injectors may be removed as an assembly. If not servicing the individual components, remove the manifold as a complete assembly.
- Remove the throttle body. Refer to
Throttle Body Assembly Replacement.
- Remove the fuel injectors. Refer to
Fuel Injector Replacement.
- Disconnect the following electrical connectors:
• | Manifold absolute pressure (MAP) sensor (1) |
- Remove the knock sensor harness electrical connector from the intake manifold.
- Set the electrical harness aside.
- Disconnect the electronic temperature control (ETC) connector.
- Remove the positive crankcase ventilation (PCV) hose - dirty air (716).
- Remove the MAP sensor (714) and retainer (736) as required.
- Remove the O-ring (715) from the sensor, as required.
- Remove the evaporative emission (EVAP) purge solenoid vent tube by performing the following:
10.1. | Remove the EVAP tube end (2) from the solenoid (1). |
10.2. | Squeeze the EVAP pipe quick connect fitting (3) retainer together. |
10.3. | Remove the EVAP tube end (3) from the vapor pipe. |
- Remove the EVAP purge solenoid bolt (2), solenoid (3), and isolator (1) from the intake manifold.
- Remove the intake manifold bolts (512).
- Remove the intake manifold (500) with gaskets.
- Remove the intake manifold gaskets (514).
- Discard the intake manifold gaskets.
Installation Procedure
- Install NEW intake manifold gaskets (514) to the intake manifold.
- Install the intake manifold (500).
- Apply a 5 mm (0.20 in) band of threadlock GM P/N 12345382 (Canadian P/N 10953489) to the threads of the intake manifold bolts (512). Refer to
Adhesives, Fluids, Lubricants, and Sealers for the correct part number.
Caution: Refer to Fastener Caution in the Preface section.
- Install the intake manifold bolts.
4.1. | Tighten the intake manifold bolts a first pass in sequence to
5 N·m (44 lb in). |
4.2. | Tighten the intake manifold bolts a final pass in sequence to
10 N·m (89 lb in). |
- Install the EVAP purge solenoid (3), isolator (1), and bolt (2) to the intake manifold. Tighten the EVAP purge solenoid bolt to
10 N·m (89 lb in).
- Install the EVAP purge solenoid vent tube to the solenoid (1) and vapor pipe.
- Install the engine coolant air bleed clamp and hose to the throttle body, if applicable.
- Lubricate the MAP sensor grommet (715) with clean engine oil.
- Install the grommet onto the MAP sensor (714).
- Install the MAP sensor (714) and the retainer (736).
- Install the PCV hose - dirty air (716).
- Connect the knock sensor harness electrical connector to the intake manifold.
- Connect the following electrical connectors:
• | Exhaust gas recirculation (EGR) valve, if equipped |
- Install the fuel injectors. Refer to
Fuel Injector Replacement.
- Install the throttle body. Refer to
Throttle Body Assembly Replacement.