GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2009 🢒 TopKick C-Series (Conventional) C4/C5 🢒 Body Systems 🢒 Air Compressor - Auxiliary 🢒 Evaporative Emission Canister Replacement

Evaporative Emission Canister Replacement C4500 and C5500

Removal Procedure

    Object Number: 803200 Size: SH
  1. If equipped, remove auxiliary air tank.
    2. 1.1. Drain auxiliary air tank.
    1.2. Disconnect pressure switch electrical connector.
    1.3. Disconnect input and output lines at auxiliary air tank.
    1.4. Remove 4 nuts and auxiliary air tank.
  2. Support canister assembly and remove four canister bracket nuts.
  3. Disconnect the evaporative emission (EVAP) vent hose from the EVAP canister.
  4. Lower EVAP canisters and disconnect EVAC line.
  5. Disconnect the EVAP purge pipe and the pipe to the fuel tank vapor pipe from the EVAP canister.
  6. Remove the EVAP vent valve from the EVAP canister bracket.
  7. Remove the EVAP canister bracket nut.
  8. Remove the EVAP canister from the EVAP canister bracket.

Installation Procedure

    Object Number: 803200 Size: SH
  1. Install the EVAP canister into the EVAP canister bracket.

    2. Caution: Refer to Fastener Caution in the Preface section.

  2. Install the EVAP canister bracket nut.

    3. Tighten
    Tighten the nut to 5 N·m (44 lb in).

  3. Install the EVAP vent valve to the canister bracket.
  4. Connect the EVAP purge pipe and the fuel tank vapor pipe to the EVAP canister.
  5. Connect the EVAP vent hose to the EVAP canister.
  6. Connect EVAP line to canister.
  7. Install EVAP canisters to step with four nuts.

    8. Tighten
    Tighten the nuts to 25 N·m (15 ft lb).

  8. If equipped, install auxiliary air tank.
    9. 8.1. Install 4 nuts and auxiliary air tank.
    8.2. Connect input and output lines at auxiliary air tank.
    8.3. Connect pressure switch electrical connector.

Evaporative Emission Canister Replacement C6500/7500 and 8500

Removal Procedure
  1. Support canister assembly and remove the 2 canister bracket nuts and the 2 canister bracket bolts.

    2. Object Number: 816405 Size: SH
  2. Disconnect the evaporative emission (EVAP) vent hose from the EVAP canister.
  3. Lower the EVAP canister(s) and disconnect EVAP line.
  4. Disconnect the EVAP purge pipe and the pipe to the fuel tank vapor pipe from the EVAP canister.
  5. Remove the EVAP vent valve from the EVAP canister bracket.
  6. Remove the EVAP canister bracket bolt.
  7. Remove the EVAP canister from the EVAP canister bracket.

Installation Procedure
  1. Install the EVAP canister into the EVAP canister bracket.

    2. Caution: Refer to Fastener Caution in the Preface section.

  2. Install the EVAP canister bracket bolt.

    3. Tighten
    Tighten the bolt to 5 N·m (44 lb in).

  3. Install the EVAP vent valve to the canister bracket.

    4. Object Number: 816405 Size: SH
  4. Connect the EVAP purge pipe and the fuel tank vapor pipe to the EVAP canister.
  5. Connect the EVAP vent hose to the EVAP canister.
  6. Connect EVAP line to the canister.
  7. Install EVAP canister(s) to the step with 2 nuts and 2 bolts.

    8. Tighten
    Tighten the nuts and bolts to 25 N·m (15 lb ft).