GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 1999 🢒 Eldorado 🢒 Engine 🢒 Engine Controls - 4.0L and 4.6L 🢒 Evaporative Emission Hoses/Pipes Replacement - Engine

Removal Procedure

    Object Number: 20426 Size: SH

    Notice: Do Not attempt to repair the EVAP pipes or the connecting hoses. Replace the damaged EVAP pipes or the connecting hoses are damaged. If the nylon EVAP pipe becomes kinked and cannot be straightened, it must be replaced.

  1. Remove the intake manifold sight shield. Refer to Intake Manifold Removal in engine mechanical.

    2. Object Number: 277968 Size: SH
  2. Remove the hardware retaining the EVAP pipe/hose.
  3. Inspect the location of the attaching hardware for installation.
  4. Remove the EVAP pipe/hose.
  5. Inspect the pipe/hose for bends, kinks, and cracks.
  6. Replace the pipes/hose as required.

Installation Procedure

    Object Number: 277968 Size: SH

    Notice: Properly secure the EVAP pipe in order to prevent chafing of the pipe.

  1. Install the EVAP pipe/hose.
  2. Reinstall the hardware retaining the EVAP pipe/hose.

    3. Object Number: 20426 Size: SH
  3. Reinstall the intake manifold sight shield. Refer to Intake Manifold Removal in engine mechanical.