GM Service Manual Online
For 1990-2009 cars only

Description

Module

DTC 10 Inside Air Temperature Sensor Voltage Low

Heater and A/C Control

DTC 11 Inside Air Temperature Sensor Open Circuit

Heater and A/C Control

DTC 12 Left Air Outlet Sensor Voltage Low

Heater and A/C Control

DTC 13 Left Air Outlet Sensor Open Circuit

Heater and A/C Control

DTC 14 Right Air Outlet Sensor Voltage Low

Heater and A/C Control

DTC 15 Right Air Outlet Sensor Open Circuit

Heater and A/C Control

DTC 16 Interior Air Mix Door Motor Voltage Low or Open Circuit

Heater and A/C Control

DTC 17 Interior Air Mix Door Motor Voltage High

Heater and A/C Control

DTC 18 Left Air Mix Door Motor Voltage Low or Open Circuit

Heater and A/C Control

DTC 19 Left Air Mix Door Motor Voltage High

Heater and A/C Control

DTC 20 Right Air Mix Door Motor Voltage Low or Open Circuit

Heater and A/C Control

DTC 21 Right Air Mix Door Motor Voltage High

Heater and A/C Control

DTC 22 Floor Air Mix Door Motor Voltage Low or Open Circuit

Heater and A/C Control

DTC 23 Floor Air Mix Door Motor Voltage High

Heater and A/C Control

DTC 24 Defroster Air Mix Door Motor Voltage Low or Open Circuit

Heater and A/C Control

DTC 25 Defroster Air Mix Door Motor Voltage High

Heater and A/C Control

DTC 27 Blower Motor Voltage Low or Open Circuit

Heater and A/C Control

DTC 28 Air Circulation Valve Voltage Low or Open Circuit

Heater and A/C Control

DTC 29 Air Circulation Valve Voltage High

Heater and A/C Control

DTC 30 Heating Cutoff Valve Voltage Low or Open Circuit

Heater and A/C Control

DTC 31 Heating Cutoff Valve Voltage High

Heater and A/C Control

DTC 35 A/C Request Signal Voltage Open Circuit

Heater and A/C Control

DTC 36 A/C Request Signal Voltage Low

Heater and A/C Control

DTC 37 Heater & A/C Control Switch Stuck

Heater and A/C Control

DTC 38 Solar/Twilight Sensor Supply Voltage Low

Heater and A/C Control

DTC 39 Solar/Twilight Sensor Supply Voltage High

Heater and A/C Control

DTC 40 Solar/Twilight Sensor Ground Shorted to Voltage

Heater and A/C Control

DTC 51 Replace Heater & A/C Control

Heater and A/C Control

DTC 52 Heater & A/C Control Not Programmed

Heater and A/C Control

DTC 55 Replace Heater & A/C Control

Heater and A/C Control

DTC 169 Outside Temperature Sensor Voltage Low

Heater and A/C Control

DTC 171 Outside Temperature Sensor Open Circuit

Heater and A/C Control