GM Service Manual Online
For 1990-2009 cars only

Item Measured

Preset Controls

Preset Controls

Preset Controls

Preset Controls

Engine Idling/Closed Loop/Park/Doors Closed/Windows Closed/Ambient Air Temp out of the sun (inside). 22-27°C (70-80°F)

--

Temp. Set to 56°C (74°F)

Temp. Set to Max. Hot

Temp. Set to Max. Cold

Temp. Set to 56°C (74°F)

--

A/C Request-OFF

A/C Request-OFF

A/C Request-ON

A/C Request-ON

--

Fan-OFF

Fan-Max. Speed

Fan-Max. Speed

Fan-Auto

--

Mode-Floor

Mode-Floor

Mode-Upper Vent

Mode-Auto

--

Outside Air-OFF

Outside Air-ON

Outside Air-ON

Outside Air-ON

--

Recirc Air-OFF

Recirc Air-OFF

Recirc Air-OFF

Recirc Air-ON

--

Rear Defog-OFF

Rear Defog-OFF

Rear Defog-OFF

Rear Defog-OFF

Outside Air Temperature

27°C (80°F)

26°C (79°F)

27°C (80°F)

27°C (80°F)

Inside Air Temperature

28°C (81°F)

29°C (82°F)

26°C (79°F)

26°C (79°F)

Upper Outlet Temperature

17°C (62°F)

21°C (69°F)

9°C (49°F)

19°C (67°F)

Lower Outlet Temperature

25°C (75°F)

51°C (124°F)

16°C (61°F)

23°C (73°F)

Solar Sensor

231 Counts

231 Counts

231 Counts

231 Counts

Mix Valve Maximum Position

200 Counts

200 Counts

200 Counts

200 Counts

Air Mix Valve Commanded

48 Counts

200 Counts

48 Counts

48 Counts

Air Mix Valve Actual

49 Counts

200 Counts

47 Counts

50 Counts

Mix Valve Minimum Position

48 Counts

48 Counts

48 Counts

48 Counts

Blower Motor PWM Speed

0%

96%

96%

13%

Mode Selection Position

Floor

Floor

Upper Outlet

Auto

A/C Request

No

No

Yes

Yes

A/C LED ON

OFF

OFF

ON

ON

Rear Defog Switch

OFF

OFF

OFF

OFF

Select Solenoid 1

ON

ON

OFF

OFF

Select Solenoid 2

OFF

OFF

ON

ON

Select Solenoid 3

ON

ON

ON

ON

Select Solenoid 4

OFF

OFF

OFF

OFF

Select Solenoid 5

OFF

OFF

OFF

OFF