INTAKE MANIFOLD (UPPER) Removal (4.3L)

WARNING: This page is about a different variant/trim than selected.

CAUTION: Always apply a few drops of clean engine oil to the male fuel pipe ends before connecting fuel pipe fittings in order to reduce the risk of fire and personal injury. This will ensure and prevent a possible fuel leak. During normal operation, the O rings located in the female connector will swell and may prevent proper reconnecting if not lubricated.

NOTE: Manufacturer does not provide a torque sequence for upper intake manifold on 4.3L, 5.0L & 5.7L engines.

Remove air cleaner assembly. Remove interior engine cover (if equipped). Remove canister purge solenoid. Disconnect A/C pressure switch, Throttle Position (TP) sensor, Idle Air Control (IAC) motor, Sequential Central Port Injection (SCPI) harness connector and the Manifold Absolute pressure (MAP) sensor.
Disconnect accelerator and cruise control cables from throttle body. Disconnect fuel lines at rear of engine. Remove brake booster vacuum hose. Remove upper intake manifold bolts. Remove upper intake manifold. See Fig 1.

Fig 1: Exploded View Of Intake Manifold Assembly (4.3L)

Courtesy of GENERAL MOTORS CORP.