GM Service Manual Online
For 1990-2009 cars only

DTC

Definition

10

Inside Air Temperature Sensor Voltage Low

11

Inside Air Temperature Sensor Open Circuit

12

Left Air Outlet Sensor Voltage Low

13

Left Air Outlet Sensor Open Circuit

14

Right Air Outlet Sensor Voltage Low

15

Right Air Outlet Sensor Open Circuit

16

Interior Air Mix Door Motor Voltage Low or Open Circuit

17

Interior Air Mix Door Motor Voltage High

18

Left Air Mix Door Motor Voltage Low or Open Circuit

19

Left Air Mix Door Motor Voltage High

20

Right Air Mix Door Motor Voltage Low or Open Circuit

21

Right Air Mix Door Motor Voltage High

22

Floor Air Mix Door Motor Voltage Low or Open Circuit

23

Floor Air Mix Door Motor Voltage High

24

Defroster Air Mix Door Motor Voltage Low or Open Circuit

25

Defroster Air Mix Door Motor Voltage High

27

Blower Motor Voltage Low or Open Circuit

28

Air Circulation Valve Voltage Low or Open Circuit

29

Air Circulation Valve Voltage High

30

Heating Cutoff Valve Voltage Low or Open Circuit

31

Heating Cutoff Valve Voltage High

35

A/C Request Signal Voltage Open Circuit

36

A/C Request Signal Voltage Low

37

Heater & A/C Control Switch Stuck

38

Solar/Twilight Sensor Supply Voltage Low

39

Solar/Twilight Sensor Supply Voltage High

40

Solar/Twilight Sensor Ground Shorted to Voltage

51

Replace Heater & A/C Control

52

Heater & A/C Control Not Programmed

55

Replace Heater & A/C Control

169

Outside Temperature Sensor Voltage Low

171

Outside Temperature Sensor Open Circuit