Heating And Air Conditioning - GMC G Service Manual

HEATING AND AIR CONDITIONING

SUBJECT
Heating.........................................................................................................................................................................1 A-1
Air Conditioning.......................................................................................................................................................... 1B-1
SUBJECT
R/V And G Series Heaters - Description.................................................................................................................. 1A- 2
Blower And Air Inlet Assembly.................................................................................................................................1A- 2
Heater Distributor Assembly...................................................................................................................................... 1A- 2
Insufficient Heat Diagnosis............................................................................................................................................ 1A- 3
Heater Circuit Diagnosis................................................................................................................................................ 1A- 6
Diagnosis of the Heater System...................................................................................................................................1A- 7
R/V Series Heater - On-Vehicle Service................................................................................................................... 1A- 8
Blower Motor Replacement........................................................................................................................................ 1A- 8
Heater Hose Routing................................................................................................................................................... 1A- 9
Heater Distributor Case and Core Replacement.................................................................................................... 1A- 9
Control Assembly Replacement................................................................................................................................1A-11
Control Cable Replacement.......................................................................................................................................1A-12
Cable Adjustment................................................................................................... .....................................................1 A-12
Blower Switch Replacement......................................................................................................................................1A-12
Resistor Replacement................................................................................................................................................. 1A-13
Vent Replacement........................................................................................................................................................ 1A-13
R/V Series Auxiliary Heater........................................................................................................................................... 1A-14
Description................................................................................................................................................................... 1 A-14
R/V Series Auxiliary Heater - On-Vehicle Service................................................................................................... 1A-16
Blower Motor Replacement........................................................................................................................................1A-16
Heater Core Replacement........................................................................................................................................... 1A-16
Resistor Replacement................................................................................................................................................. 1 A-16
Auxiliary Blower Switch Replacement..................................................................................................................... 1A-16
Coolant-Control Valve Replacement........................................................................................................................ 1A-16
G-Van Heater - On-Vehicle Service............................................................................................................................1A-17
Blower Motor Replacement........................................................................................................................................1A-17
Heater Hose Routing................................................................................................................................................... 1A-17
Heater Distributor Case and Core Replacement.................................................................................................... 1A-18
Distributor And Defroster Duct Replacement......................................................................................................... 1A-19
Control Assembly and/or Blower Switch Replacement........................................................................................1A-19
Control Cable Replacement.......................................................................................................................................1A-21
Cable Adjustment........................................................................................................................................................ 1A-21
Resistor Replacement................................................................................................................................................. 1A-22
Vent Replacement........................................................................................................................................................ 1A-22
SECTION 1
CONTENTS
SECTION 1A
HEATING
CONTENTS
1A-1
PAGE
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