Workshop Repair and Service Manuals GMC SIERRA
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Cooling

Air Conditioning Accumulator Replacement (Non-HP2) Accumulator      Air Conditioning Accumulator Replacement Callout Component Name Preliminary Procedure Recover the refrigerant. Refer toRefrigerant Recovery and Recharging. 1 Suction Hose Nut Caution:Refer toFastener...
Air Conditioning (A C) Refrigerant Pressure Sensor Replacement (Non-HP2)      Special Tools J-39400-A Halogen Leak Detector Removal Procedure Disconnect the electrical connector from the A/C refrigerant pressure sensor.Remove the A/C refrigerant pressure sensor-(1) from the condenser...
Air Conditioning (A C) Refrigerant Pressure Sensor Replacement (LGH LML)      Air Conditioning (A/C) Refrigerant Pressure Sensor Replacement Callout Component Name Preliminary Procedures Disconnect the electrical connector from the pressuresensor. 1 A/C Refrigerant Pressure Sensor...
Air Conditioning and Heater Module Assembly Removal and Installation      Special Tools J 43181 Heater Line Quick Connect Release Tool Removal ProcedureDrain the engine coolant. Refer toCooling System Draining and Filling. 43181 Using the J 43181 heater line quick connect release tool...
Air Conditioning Clutch Drive Plate Adjustment      Install the clutch plate assembly. Note:Ensure the drive plate does not drag against the pulley whenthe pulley is rotated. Measure the air gap between the pulley and the drive plate.Adjust the shims to achieve a...
Air Conditioning Compressor Bracket Replacement (LGH LML) Compressor      Air Conditioning Compressor Bracket Replacement Callout Component Name Preliminary ProceduresRemove the air conditioning compressor. Refer toAir Conditioning Compressor ReplacementRemove the auxiliary generator, if...
Air Conditioning Compressor Bracket Replacement (Non-HP2) Compressor      Removal ProcedureRemove the A/C compressor. Refer toAir Conditioning Compressor Replacement.Remove the A/C belt tensioner bolts.Remove the A/C belt tensioner. Remove the A/C compressor bracket mounting bolts.Remove the A/C...
Air Conditioning Compressor Oil Balancing (HP2) Compressor      Special ToolsGE-48997 A/C POE Oil Injector (HP2)J 39400-A Halogen Leak DetectorJ 45037 A/C Oil InjectorDraining ProcedureRemove the A/C compressor from the vehicle. Refer toAir Conditioning Compressor Replacement....
Air Conditioning Compressor Oil Balancing (Non-HP2) Compressor      Draining Procedure Important:Drain and measure as much of the refrigerant oil as possiblefrom the removed compressor. Before draining oil, position the compressor verdically(clutch facing upwards) and let it sit for 1...
Air Conditioning Compressor Replacement (LGH LML) Compressor      Air Conditioning Compressor Replacement Callout Component Name Preliminary ProceduresRecover the refrigerant. Refer toRefrigerant Recovery and RechargingRemove the drive belt. Refer toDrive Belt ReplacementRemove the...
Air Conditioning Condenser Replacement (LGH LML) Condenser      Special Tools GE-39400-AHalogen Leak Detector For equivalent regional tools, Refer toSpecial Tools Removal ProcedureRecover the refrigerant. Refer toRefrigerant Recovery and Recharging.Remove tie bar. Refer toFront End Upper...
Air Conditioning Cycling Switch Replacement (Non-HP2)      Special Tools J-39400-A Halogen Leak Detector Removal ProcedureDisconnect the electrical connector from the A/C low pressure switch. Remove the A/C low pressure switch from the accumulator.Remove the O-ring and...
Air Conditioning Evaporator Tube Replacement (Non-HP2) Evaporator      Special Tools J-39400-A Halogen Leak Detector Removal ProcedureRecover the refrigerant. Refer toRefrigerant Recovery and Recharging.Remove the upper radiator air baffle and deflector. Refer toRadiator Air Upper Baffle and...
Air Conditioning O-Ring Seal Replacement      Removal Procedure Disassemble the A/C refrigerant components. Refer to theappropriate repair procedureFor compression style fittings use a back up wrench on thefitting (2) and loosen the fitting nut (1).For banjo style...
Air Conditioning Refrigerant High Pressure Service Valve Replacement      Air Conditioning Refrigerant High Pressure Service Valve Replacement Callout Component Name Preliminary ProcedureRemove the service port cap.Recover the refrigerant. Refer toRefrigerant Recovery and Recharging. 1...
Air Conditioning Refrigerant Service Valve Core Replacement      Air Conditioning Refrigerant Service Valve Core Replacement Callout Component Name Preliminary ProcedureRemove the service port cap.Recover the refrigerant. Refer toRefrigerant Recovery and Recharging. 1 Air...
Air Conditioning System Seal Replacement      Removal Procedure Remove the seal washer from the A/C refrigerantcomponent. Important:Cap or tape the open A/C refrigerant components immediatelyto prevent system contamination. Inspect the seal washer for signs of damage...
Air Inlet Assembly Replacement      Air Inlet Assembly Replacement Callout Component Name Preliminary ProcedureRemove the HVAC module assembly. Refer toAir Conditioning and Heater Module Assembly Removal and Installation.Disconnect the electrical...
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...
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...