Home ReviewsRefund
Home/Hummer/H2/Hummer H2 I (2002-2007)/Repair manual/Automatic HVAC System/Heating, Ventilation and Air Conditioning: Specifications
Contents Wiring diagrams Section: Automatic HVAC System All sections

Heating, Ventilation and Air Conditioning: Specifications Hummer H2 I

Automatic HVAC System ~261 words

Fastener Tightening Specifications

ApplicationSpecification
MetricEnglish
A/C Accumulator Nut to Evaporator16 N.m12 lb ft
A/C Belt Tensioner Bolts50 N.m37 lb ft
A/C Low Pressure Switch6 N.m53 lb in
A/C Refrigerant Filter Retaining Nuts15 N.m11 lb ft
A/C Refrigerant Pressure Sensor6 N.m53 lb in
Accumulator Bracket Nut9 N.m80 lb in
Accumulator Clamp Bolt10 N.m8 lb ft
Air Distribution Duct Screws2 N.m18 lb in
Air Distribution Housing Screws2 N.m18 lb in
Blower Motor Screws2 N.m18 lb in
Compressor Bracket Mounting Bolts50 N.m37 lb ft
Compressor Clutch Plate Retaining Bolt18 N.m13 lb ft
Compressor Discharge Hose to Condenser Nut16 N.m12 lb ft
Compressor Mounting Bolts50 N.m37 lb ft
Compressor Suction/Discharge Hose Bolt16 N.m12 lb ft
Compressor Suction Hose at Accumulator Nut16 N.m12 lb ft
Condenser Upper Insulator Retainer Bolts9 N.m80 lb in
Evaporator Core Cover Screws2 N.m18 lb in
Evaporator Tube Fitting at Orifice25 N.m18 lb ft
Evaporator Tube at Condenser Nut16 N.m12 lb ft
Evaporator Tube at Evaporator Nut16 N.m12 lb ft
Filter Access Door Screw2 N.m18 lb in
Floor Air Outlet Duct Screw1.6 N.m14 lb in
Heater Core Cover Screws2 N.m18 lb in
Hood Spring Mounting Bolt and Nut17 N.m13 lb ft
HVAC Module Mounting Bolts4 N.m35 lb in
HVAC Module Mounting Nuts9 N.m80 lb in
HVAC Module Screws2 N.m18 lb in
Mode Actuator Screws2 N.m18 lb in
Recirculation Actuator Screws17 N.m13 lb ft

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
Accumulator ReplacementMl*Oz*
*Add 60 ml (2 oz) of PAG oil, plus the equal amount of oil drained from the accumulator.
Compressor Replacement60 ml2 oz
The Denso replacement compressor is precharged with 237 ml (8.0 oz) of PAG oil.
Condenser Replacement30 ml1 oz
Evaporator Replacement90 ml3 oz
If more than the specified amount of PAG oil was drained from a component, add the equal amount drained.
Total System PAG Oil Capacity210 ml7.1 oz
R-134a
Refrigerant Charge0.7 kg1.6 lb

Refrigerant System Capacities

The Heating, Ventilation and Air Conditioning (HVAC) system is divided into two sections. The first, Heating, Ventilation and Air Conditioning, it has all of the replacement procedures that pertain to the HVAC components or functions that are associated with an automatic control system. The second, HVAC Systems-Automatic, has all of the diagnostic procedures specific to the automatic control system.

For systems with DTCs, begin the system diagnosis with the following procedures: Diagnostic System Check - HVAC Systems - Automatic in HVAC Systems-Automatic

The Diagnostic System Check will provide the following information

  1. The identification of the control modules which command the system.
  2. The ability of the control modules to communicate through the class 2 serial data circuit.

The use of the Diagnostic System Check will identify and lead the technician to the correct diagnostic procedure.

Review the Description and Operation information to help you determine the correct symptom diagnostic procedure when a malfunction exists. Reviewing the Description and Operation information will also help you determine if the condition described by the customer is normal operation. The HVAC Description and Operation information is divided into

  1. «Air Delivery Description and Operation»(ref-187235-S37181654632005083100000) in HVAC Systems-Automatic
  2. «Air Temperature Description and Operation»(ref-187235-S20090950652005083100000) in HVAC Systems-Automatic

The Air Delivery Description and Operation contains the following topics

  1. HVAC Control Components
  2. Air Speed
  3. Air Delivery
  4. Recirculation Operation
  5. Automatic Operation

The Air Temperature Description and Operation contains the following topics

  1. HVAC Control Components
  2. Heating and A/C Operation
  3. Automatic Operation
  4. Engine Coolant
  5. A/C Cycle

More articles — Heating, Ventilation and Air Conditioning