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

Removal Procedure

    Object Number: 257459 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. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Remove the hardware retaining the EVAP pipe or disconnect the quick connect fittings (3).
  3. Note the location of the attaching hardware for installation.
  4. Remove the EVAP pipe.
  5. Inspect the hoses for cuts, swelling, cracks, and distortion. Replace the hoses as required.
  6. Inspect the pipes for bends, kinks, and cracks. Replace the pipes as required.

Installation Procedure

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

    Important: Route the replacement EVAP pipe in the same manner as the original EVAP pipe was routed.


    Object Number: 257459 Size: SH
  1. Install the EVAP pipe (3).
  2. Connector the quick connect or Reinstall the hardware retaining the EVAP pipe.
  3. Lower the vehicle.