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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 377 (Engine Controls - Removal & Installation - Flex Fuel & Gasoline) >> Air Induction Systems >> Intake Manifold >> Removal (Upper - 4.3L)

Removal (Upper - 4.3L)

WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the air cleaner resonator outlet duct. See AIR CLEANER RESONATOR OUTLET DUCT .
  2. Release fuel system pressure. See FUEL SYSTEM PRESSURE RELEASE . Disconnect fuel feed and fuel return line fittings at rear of engine. See Figure.
  3. Remove fuel feed and fuel return line retainer nuts at fuel meter assembly. Remove fuel feed and fuel return line retainer at fuel meter assembly. Remove fuel line-to-intake manifold bracket retaining bolt. Pull fuel lines straight up from fuel meter assembly. Set fuel lines aside.
  4. Remove and discard the following components from the fuel meter body: Fuel seal retainers, upper fuel seals, spacer rings and lower fuel seals. See Figure.
  5. Disconnect accelerator control cable from throttle lever and bracket. Disconnect cruise control cable from throttle lever and bracket (if equipped). Label and disconnect vacuum hose(s) for installation reference.
  6. Disconnect A/C compressor clutch and A/C pressure switch harness connectors (if equipped). Remove engine wiring harness clip from accelerator control cable bracket. Remove accelerator control cable bracket-to-throttle body and intake manifold studs/nuts. See Figure. Remove accelerator control cable bracket with cables attached and position aside.
  7. Disconnect harness connectors from Throttle Position (TP) sensor, Idle Air Control (IAC) valve and control port injector module. See Figure. Remove engine wiring harness clip bolt near left front corner of engine. Disconnect Manifold Absolute Pressure (MAP) sensor and EVAP canister purge solenoid valve harness connectors.
  8. Disconnect EVAP canister purge solenoid valve hose. Remove 2 nuts retaining engine wiring harness bracket to intake manifold studs at left rear corner of engine. Remove engine wiring harness bracket from intake manifold mounting studs. Remove engine wiring harness ground wire nut on rear of right cylinder head. Remove engine wiring harness ground wire from rear of right cylinder head.
  9. Remove engine wiring harness rear bracket nut at EVAP canister purge solenoid valve. Remove engine wiring harness bracket stud. Remove engine wiring harness bracket with harness attached and position aside.
  10. Remove PCV hose from left side of engine. See Figure. Remove power brake booster vacuum hose from intake manifold fitting. Remove accelerator control cable routing bracket-to-throttle body retaining nuts. See Figure.
  11. Remove accelerator control cable routing bracket. Remove upper intake manifold studs. Remove 2 front throttle body studs. Remove upper intake manifold. Remove upper intake manifold gasket and discard. Remove and discard the "O" ring seal from the fuel meter body.
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