LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> GMC >> 2004 >> Envoy RWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - 4.2L (Introduction) >> Repair Instructions >> Secondary Air Injection (AIR) Pump Replacement >> Installation Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Installation Procedure

    Fig 1: Removing/Installing AIR Pump
    GM1297873Courtesy of GENERAL MOTORS CORP.
  1. Install the AIR pump to the vehicle.
    2. NOTE: Refer to Fastener Notice in Cautions and Notices.
  2. Install the 3 bolts securing the AIR pump bracket to the vehicle frame.

    Tighten:  Tighten the bolts to 20 N.m (15 lb ft).

  3. Connect the electrical connector to the AIR pump.
  4. Install the electrical relay to the AIR pump bracket.
    5. IMPORTANT: Ensure the air inlet and air outlet pipes are clean and clear of any debris before connecting to the AIR pump.
  5. Connect both the air inlet and air outlet pipe to the AIR pump.
  6. Lower the vehicle.
scientia non olet · About LEMON Manuals