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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 186 (Heating, Ventilation, And Air Conditioning) >> Repair Instructions >> Auxiliary Air Conditioning Evaporator Tube Replacement (Suburban XL) >> Installation Procedure

Installation Procedure

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2008 GMC Yukon XL, 2008 GMC Yukon, 2008 Chevrolet Tahoe, 2008 Chevrolet Suburban, and 2008 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT: The replacement A/C and heater pipes are shipped in two sections and spliced together upon installation. Refer to Auxiliary Heater and Air Conditioning Pipe Repair .
  1. Install the auxiliary A/C evaporator tubes to the vehicle.
    2. Fig 1: View Of Auxiliary Heater Pipes, Clamps & Heater/A/C Tubes Retaining Nut & Stud
    GM691870Courtesy of GENERAL MOTORS CORP.
  2. Install the auxiliary A/C evaporator tubes (3) to the clamps (5).
    3. NOTE: Refer to Fastener Notice .
  3. Install the heater/A/C tubes retaining nut (4) to the stud (1) at the frame (6).

    Tighten:  Tighten the nut to 7 N.m (62 lb in).

    4. Fig 2: View Of Auxiliary A/C Evaporator Tubes & Nut & Auxiliary HVAC Module
    GM691871Courtesy of GENERAL MOTORS CORP.
  4. Install the auxiliary A/C evaporator tubes (2, 3) and the retaining nut to the auxiliary HVAC module.

    Tighten:  Tighten the nut to 16 N.m (12 lb ft).

  5. Lower the vehicle.
  6. Install the rear wheelhouse liner. Refer to Rear Wheelhouse Panel Liner Replacement (RPO X88 Chevrolet, RPO O88 GMC) or Rear Wheelhouse Panel Liner Replacement (RPO HP2) .
  7. Install the right assist step. Refer to Assist Step Replacement (Z71) or Assist Step Replacement (Power) or Assist Step Replacement (Chevrolet HP2) or Assist Step Replacement (GMC Denali XL) .
  8. Install the front wheelhouse liner. Refer to Front Wheelhouse Liner Replacement - Right Side .
    9. Fig 3: View Of Auxiliary A/C Evaporator Tubes At Condenser Tube & Accumulator
    GM612568Courtesy of GENERAL MOTORS CORP.
  9. Install the auxiliary A/C evaporator tubes (3) to the condenser tube (2) and the accumulator (5).

    Tighten:  Tighten the nuts to 16 N.m (12 lb ft).

  10. Recharge the refrigerant to the system. Refer to Refrigerant Recovery and Recharging (Non HP2)  or Refrigerant Recovery and Recharging (HP2) .
  11. Leak test the fittings of the component using the J 39400-A  . See Special Tools .
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