Workshop Repair and Service Manuals GMC SIERRA
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HVAC

Blower Motor Replacement      Removal ProcedureIf equipped, remove the sound insulator panel. Refer toInstrument Panel Insulator Replacement.Remove the blower motor insulating cover screws.Disconnect the electrical connector from the blowermotor.Remove the...
Compressor Clutch Plate Hub Assembly Replacement Compressor Compressor Clutch      Compressor Clutch Plate/Hub Assembly Replacement Callout Component Name Preliminary ProcedureRemove the air conditioning compressor belt. Refer toAir Conditioning Compressor Belt Replacement.Remove the air...
Defroster Door Replacement      Removal Procedure Remove the HVAC module. Refer toAir Conditioning and Heater Module Assembly Removal and Installation.If equipped remove the heat stakes-(1) from theHVAC module-(2) with a screwdriver and a hammer. If...
Drive Belt Idler Pulley Replacement - without Air Conditioning      Removal Procedure Loosen the idler pulley bolt.Remove the drive belt. Refer toDrive Belt Replacement.Remove the idler pulley.Installation Procedure Install the idler pulley.Install the idler pulley bolt until...
Driver or Passenger Seat Back Ventilation Heating and Cooling Blower Replacement (Denali with KB6)      Driver or Passenger Seat Back Ventilation Heating and Cooling Blower Replacement Callout Component Name 1 Front Seat Back Cushion Finish Panel Procedure Using a nylon flat-bladed tool push the tabs in onthe side...
Duct Air Temperature Sensor Replacement - Lower Right Side      Duct Air Temperature Sensor Replacement - Lower Right Side Callout Component Name Preliminary ProceduresRemove the front floor console (if equipped). Refer toFront Floor Console Replacement.Remove the radio front...
Duct Air Temperature Sensor Replacement - Lower Left Side      Duct Air Temperature Sensor Replacement - Lower Left Side Callout Component Name Preliminary Procedure Remove the knee bolster. Refer toKnee Bolster Replacement. 1 Air Temperature Sensor – LH Tip:Disconnect...
Duct Air Temperature Sensor Replacement - Upper Right Side      Duct Air Temperature Sensor Replacement - Upper Right Side Callout Component Name Preliminary ProcedureRemove the instrument panel upper trim panel with windshielddefroster nozzle grille. Refer ToInstrument Panel...
Duct Air Temperature Sensor Replacement - Upper Left Side      Duct Air Temperature Sensor Replacement - Upper Left Side Callout Component Name Preliminary Procedure Remove the instrument panel to the service position. Refer toInstrument Panel Service Positioning. 1...
Expansion (Orifice) Tube Replacement      Expansion (Orifice) Tube Replacement Callout Component Name Preliminary ProceduresRecover the refrigerant. Refer toRefrigerant Recovery and Recharging.Remove the air cleaner outlet duct. Refer toAir Cleaner Resonator...
Floor Air Outlet Duct Replacement - Left Side      Removal Procedure Remove the push pin from the left floor air outletduct-(3).Remove the left floor duct-(3) from the rightfloor air outlet duct-(2).Installation Procedure Install the left floor air outlet duct-(3) to...
Floor Air Outlet Duct Replacement - Right Side      Floor Air Outlet Duct Replacement - Right Side Callout Component Name Preliminary ProcedureRemove the I/P insulator. Refer toInstrument Panel Insulator Replacement.Remove the front floor console side trim panel...
Flushing (HP2)      Special ToolsJ 41447 Leak Detection DyeJ 42220 Universal 12V Leak Detection LampJ 43600 ACR 2000 Air Conditioning Service CenterJ 45268 Flush Adapter Kit Important:Flushing with the ACR 2000 is not intended to remove metal...
Flushing (Non HP2)      Special ToolsJ 41447 Leak Detection DyeJ 42220 Universal 12V Leak Detection LampJ 43600 ACR 2000 Refrigerant StationJ 45268 Flush Adapter Kit Important:Flushing is not intended to remove metal from the A/C system. Flushing is...
Front Seat Cushion Ventilation Blower Replacement (Denali with KB6)      Front Seat Cushion Ventilation Blower Replacement Callout Component Name Preliminary Procedure Remove the front seat. Refer toFront Seat Removal and Installation - Bucket. 1 Front Seat Adjuster Outer Finish...
Front Seat Heater Control Module Replacement      Front Seat Heater Control Module Replacement Callout Component Name Preliminary Procedure Remove the front driver seat. Refer toFront Seat Removal and Installation - Bucket. 1 Driver Seat Adjuster Outer...
Front Seat Heater Switch Replacement      Removal ProcedureRemove door upper trim panel. Refer toUpper Extension Trim Panel Replacement. Pull the door trim panel away from the door and support thebottom of the trim panel on the door panel hooks. Refer toFront Side...
Heater and Air Conditioning Evaporator and Blower Upper Case Replacement      Heater and Air Conditioning Evaporator and Blower Upper Case Replacement Callout Component Name Preliminary ProceduresRemove the air conditioning and heater module assembly. Refer toAir Conditioning and Heater Module...
Heater and Air Conditioning Evaporator and Blower Lower Case Replacement      Heater and Air Conditioning Evaporator and Blower Lower Case Replacement Callout Component Name Preliminary ProceduresRemove the air conditioning and heater module assembly. Refer toAir Conditioning and Heater Module...
Heater Core Cover Replacement Heater Core      Heater Core Cover Replacement Callout Component Name Preliminary Procedure Remove the HVAC module. Refer toAir Conditioning and Heater Module Assembly Removal and Installation. 1 Heater Core Cover Screw...
Heater Core Replacement Heater Core      Heater Core Replacement Callout Component Name Preliminary ProcedureRemove the HVAC module. Refer toAir Conditioning and Heater Module Assembly Removal and Installation.Disconnect the wiring harness retainer from the...
Heater Inlet Hose Replacement (LML) Heater Lines      Heater Inlet Hose Replacement Callout Component Name Preliminary ProceduresDrain the coolant. Refer toCooling System Draining and Filling.Remove the air cleaner outlet duct. Refer toAir Cleaner Outlet Duct...
Heater Outlet Hose Replacement (LGH and LML)      Heater Outlet Hose Replacement Callout Component Name Preliminary ProceduresDrain the coolant. Refer toCooling System Draining and Filling.Disconnect the radiator surge tank hose from the heater outlet hose. Refer...
Heater Outlet Hose Replacement (Non-HP2)      Removal ProcedureDrain the cooling system. Refer toCooling System Draining and Filling.Remove the air intake tube.Remove the heater and surge tank hoses from the mountingclip. Squeeze the plastic retainer release tabs....