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HOMESERVICE MANUALSGMC1999FORWARD CONTROL 5.7 R, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 719 (ENGINE MECHANICAL - 3.8L (UNIT REPAIR))REPAIR INSTRUCTIONSINTAKE MANIFOLD REMOVAL - LOWER (L36)
1999 GMC Forward Control 5.7 R, Automatic

Intake Manifold Removal - Lower (L36)

1999 GMC Forward Control 5.7 R, AutomaticSECTION Intake Manifold Removal - Lower (L36)
WARNING: This page is about a different car, the 2002 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.

Important:  The two bolts which fasten the lower intake manifold to the cylinder head are accessible only after the upper intake is removed. The bolts are located in the right front and left rear corners of the lower intake manifold. Remove the upper intake manifold to service the lower intake.

  1. Remove the EGR outlet pipe from the intake manifold.
  2. Remove the lower intake manifold bolts.
  3. Remove the lower intake manifold.
  4. Remove the lower intake manifold gasket.
    Fig 1: EGR Outlet Pipe, Lower Intake Manifold, Bolts & Gasket
    G01703497Courtesy of GENERAL MOTORS CORP.
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.