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Removal (Auxiliary Tahoe/Yukon)

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  1. Recover the refrigerant from the A/C system. See RECOVERY, EVACUATION & RECHARGING in GENERAL SERVICING PROCEDURES article in GENERAL SERVICING. Drain the engine coolant. Raise the vehicle.
  2. Disconnect the heater lines from the auxiliary HVAC module at the underside of the vehicle. See Figure. Disconnect the air conditioning lines from the auxiliary HVAC module at the underside of the vehicle. See Figure.
  3. Remove the nuts from the studs that secure the auxiliary HVAC module to the underside of the vehicle. See Figure. Remove the safety stands. Lower the vehicle.
  4. Remove the right rear quarter trim panel. Remove the electronic suspension control module Disconnect the electrical connectors from the Auxiliary HVAC module.
  5. Remove the fastener for the upper auxiliary air duct. Carefully slide the duct up, into the headliner, until the bottom edge of the duct is above the air distributor duct. See Fig 1.
  6. Remove the fasteners retaining the auxiliary HVAC module to the vehicle. Remove the auxiliary HVAC module from the vehicle. See Figure.
Fig 1: Removing Fasteners For Upper Auxiliary Air Duct (Tahoe/Yukon)
G00223815Courtesy of GENERAL MOTORS CORP.
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