Home/Cadillac/STS/Cadillac STS I (2004-2007)/Repair manual/Automatic HVAC System/Heating, Ventilation and Air Conditioning: Specifications
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Heating, Ventilation and Air Conditioning: Specifications Cadillac STS I

Fastener Tightening Specifications

ApplicationSpecification
MetricEnglish
A/C Compressor Mounting Bolts23 N.m17 lb ft
A/C Compressor Mounting Bracket Bolts50 N.m37 lb ft
A/C Discharge Hose Bolt - Compressor9 N.m80 lb in
A/C Discharge Hose Bolt - Condenser9 N.m80 lb in
A/C Suction Hose Bolt - Compressor9 N.m80 lb in
A/C Suction Hose Bolt - Condenser9 N.m80 lb in
A/C Suction Hose Bracket Retaining Nut9 N.m80 lb in
A/C Suction Line Bracket Screw2 N.m18 lb in
Air Distribution Duct Screws2 N.m18 lb in
Air Inlet Assembly Bolts6 N.m53 lb in
Air Outlet Duct Screws2 N.m17 lb in
Blower Motor Mounting Screws1.5 N.m13 lb in
Condenser Bracket Mounting Bolts5.4 N.m48 lb in
Condenser Mounting Bracket to Radiator Bolts5.4 N.m48 lb in
Desiccant Bag Plug2.9 N.m26 lb in
Heater Hose Bracket Screws9 N.m80 lb in
HVAC Module Mounting Nuts9 N.m80 lb in
HVAC Module Screws1 N.m9 lb in
Oil Drain Bolt30 N.m22 lb ft
Refrigerant Pressure Sensor9.8 N.m87 lb in
TXV Bolts3.5 N.m31 lb in

Fastener Tightening Specifications

Refrigerant System Capacities

ApplicationSpecification
MetricEnglish
PAG Oil GM P/N 12378526 for United States PAG Oil GM P/N 88900060 for Canada
Compressor Replacement
The Denso 7SBU16 service compressor is precharged with the specified amount of PAG oil.140 ml 14.73 oz 1
Condenser Replacement40 ml 11.35 oz 1
Desiccant Bag Replacement10 ml 10.34 oz 1
Evaporator Replacement40 ml 11.35 oz 1
Refrigerant Line Replacement10 ml 10.34 oz 1
Total System PAG Oil Capacity140 ml4.73 oz
R-134a
Refrigerant Charge0.625 kg1.38 lb
1 If more than the specified amount of PAG oil was drained from a component, add the equal amount of oil drained.

Refrigerant System Capacities

Begin the system diagnosis with Diagnostic System Check - Vehicle in Vehicle DTC Information. The Diagnostic System Check - Vehicle will provide the following information

  1. The identification of the control modules which are not communicating.
  2. The identification of any stored diagnostic trouble codes (DTCs) and their status.

The use of the Diagnostic System Check - Vehicle will identify the correct procedures to begin vehicle diagnosis. These must be performed before system DTC or symptom diagnosis.