GM Service Manual Online
For 1990-2009 cars only
Table 1: IPC Indicators
Table 2: DIC Indicators

The indicator description and operation uses generic indicator names. Refer to the table below for the indicators that are available on this vehicle:

IPC Indicators

Vehicle Indicator Name

Indicator Description Title

ABS

ABS Indicator

Air Bag

Air Bag Indicator(s)

Battery symbol

Charging System Indicator(s)

BRAKE

Brake System Indicator(s)

CRUISE

Cruise Control Indicator

Fasten Safety Belt symbol

Fasten Safety Belt Indicator

Fog Lamp

Lighting System Indicator(s)

High Beam symbol

Lighting System Indicator(s)

Oil Pressure symbol

Engine Oil Indicator(s)

SECURITY

Theft Deterrent Indicator(s)

SERVICE ENGINE SOON

Malfunction Indicator Lamp (MIL)

TRAC ON

Traction Control System Indicator(s)

TRAC OFF

Traction Control System Indicator(s)

Turn Signal symbols

Lighting System Indicator(s)

DIC Indicators

Vehicle Indicator Name

Indicator Description Title

AIR BAG PROBLEM - 1

Air Bag Indicator(s)

BATTERY SAVER ACTIVE - 29

Charging System Indicator(s)

CHANGE OIL NOW - 2

Engine Oil Indicator(s)

CHANGE OIL SOON - 3

Engine Oil Indicator(s)

CHECK CHARGE SYSTEM - 4

Charging System Indicator(s)

CHECK GAS CAP - 36

Fuel System Indicator(s)

CHECK OIL LEVEL - 5

Engine Oil Indicator(s)

CONFIRM TIME AND DATE - 7

Date and Time Indicator(s)

DRIVERS DOOR AJAR - 8

Door Ajar Indicator(s)

ENGINE HOT...A/C OFF - 9

Engine Coolant Indicator(s)

HEADLAMPS SUGGESTED - 27

Lighting System Indicator(s)

HOT... REDUCE ENGINE RPM - 10

Engine Coolant Indicator(s)

HOT... STOP ENGINE - 11

Engine Coolant Indicator(s)

HOT...IDLE ENGINE - 32

Engine Coolant Indicator(s)

LEFT REAR DOOR AJAR - 13

Door Ajar Indicator(s)

LOW BRAKE FLUID - 14

Brake System Indicator(s)

LOW ENGINE COOLANT - 15

Engine Coolant Indicator(s)

LOW FUEL - 16

Fuel System Indicator(s)

LOW OIL PRESSURE - 17

Engine Oil Indicator(s)

LOW TIRE PRESSURE - 18

Tire Pressure Monitoring Indicator(s)

LOW WASHER FLUID - 19

Windshield Washer Indicator(s)

PARK BRAKE SET - 20

Brake System Indicator(s)

PASSENGER DOOR AJAR - 21

Door Ajar Indicator(s)

RIGHT REAR DOOR AJAR - 22

Door Ajar Indicator(s)

SERV STABILITY SYS - 26

Stability System Indicator(s)

SERVICE VEHICLE SOON - 23

Electrical System Indicator(s)

STABILITY SYSTEM ACTIVE - 42

Stability System Indicator(s)

STARTING DISABLED - 33

Theft System Indicator(s)

THEFT ATTEMPTED - 25

Theft System Indicator(s)

THEFT SYSTEM FAULT - 12

Theft System Indicator(s)

TRANS HOT... IDLE ENGINE - 6

Transmission System Indicator(s)

TRUNK AJAR - 28

Trunk Ajar Indicator

TURN SIGNAL ON ? - 24

Lighting System Indicator(s)

ABS Indicators

The IPC illuminates the ABS indicator when the following occurs:

    • The electronic brake control module (EBCM) detects a malfunction with the antilock brake system. The IPC receives a class 2 message from the EBCM requesting illumination.
    • The IPC performs the displays test at the start of each ignition cycle. The indicator illuminates for approximately 5 seconds.
    • The IPC detects a loss of class 2 communications with the EBCM and the discrete back-up ABS indicator signal circuit is high.

When the ABS indicator is commanded on, the IPC also illuminates the TRAC OFF indicator and illuminates the SERVICE STABILITY SYSTEM indicator in the DIC.

Air Bag Indicator(s)

Air Bag Indicator

The IPC illuminates the air bag indicator when any of the following occur:

    • The inflatable restraint sensing and diagnostic module (SDM) detects a malfunction with the supplemental inflatable restraint system. The IPC receives a class 2 message from the SDM requesting illumination.
    • The IPC performs the displays test at the start of each ignition cycle. The IPC flashes the air bag indicator 7 times.
    • The IPC detects a loss of class 2 communications with the SDM.

AIR BAG PROBLEM -- 1

The DIC displays the AIR BAG PROBLEM message when any of the following occur:

    • The inflatable restraint sensing and diagnostic module (SDM) detects a malfunction with the supplemental inflatable restraint system. The DIC receives a class 2 message from the SDM requesting illumination.
    • The DIC detects a loss of class 2 communications with the SDM.

Brake System Indicators

BRAKE

The IPC illuminates the BRAKE indicator when any of the following occur:

    • The IPC detects that the park brake is engaged. If the vehicle travels 3-15.2 meters (10-50 feet) with the park brake engaged, the IPC sends a class 2 message to the radio in order to activate an audible warning.
    • The IPC detects a low brake fluid condition. The IPC sends a class 2 message to the radio in order to activate an audible warning.
    • The electronic brake control module (EBCM) detects a failure in the braking system. The IPC receives a class 2 message from the EBCM requesting illumination. The IPC sends a class 2 message to the radio in order to activate an audible warning.
    • The IPC performs the displays test at the start of each ignition cycle. The indicator illuminates for approximately 5 seconds.
    • The IPC detects a loss of class 2 communications with the EBCM and the discrete back-up ABS indicator signal circuit is high.

LOW BRAKE FLUID -- 14

The DIC displays the LOW BRAKE FLUID -- 14 message when the IPC detects a low brake fluid condition. The DIC receives a class 2 message from the IPC requesting illumination.

PARK BRAKE SET -- 20

The DIC displays the PARK BRAKE SET -- 20 message when the IPC detects that the park brake is engaged with the vehicle in Park or Neutral.

Charging System Indicator(s)

BATTERY SAVER ACTIVE -- 29

The DIC displays the BATTERY SAVER ACTIVE -- 29 message when the dash integration module (DIM) detects that the battery is in a heavy discharge condition for a long period of time. The blower fans, rear defogger, heated seats, and heated mirrors are disabled. The DIC receives a class 2 message from the DIM requesting illumination. The IPC sends a class 2 message to the radio in order to activate an audible warning.

Charging System Indicator

The IPC illuminates the charging system indicator when any of the following occur:

    • The PCM detects that the generator output is less than 11 volts or greater than 16 volts. The IPC receives a class 2 message from the PCM requesting illumination.
    • The IPC determines that the system voltage is less than 11 volts or greater than 16 volts. The IPC receives a class 2 message from the dash integration module (DIM) indicating the system voltage. The IPC sends a class 2 message to the radio to activate an audible warning.
    • The IPC performs the displays test at the start of each ignition cycle. The indicator illuminates for approximately 5 seconds.
    • The ignition is on, with the engine off.

CHECK CHARGE SYSTEM -- 4

The DIC displays the CHECK CHARGE SYSTEM -- 4 message when any of the following occur:

    • The PCM detects that the generator output is less than 11 volts or greater than 16 volts. The DIC receives a class 2 message from the PCM requesting illumination.
    • The DIC determines that the system voltage is less than 11 volts or greater than 16 volts. The DIC receives a class 2 message from the dash integration module (DIM) indicating the system voltage.

Cruise Control Indicator

The IPC illuminates the CRUISE indicator when any of the following occur:

    • The PCM detects that the cruise control is requested. The IPC receives a class 2 message from the PCM requesting illumination.
    • The IPC performs the displays test at the start of each ignition cycle. The indicator illuminates for approximately 5 seconds.

Date and Time Indicator

CONFIRM TIME AND DATE -- 7

The DIC displays the CONFIRM TIME AND DATE -- 7 message when any of the following occur:

    • The radio sends a class 2 message to the DIC requesting a time update.
    • The battery is disconnected and then reconnected.

Press the RESET button in order to display the last known date.

Door Ajar Indicator(s)

XX DOOR AJAR -- 8, 13, 21, 22

Each door module monitors the associated door ajar switch signal circuit. The DIC receives a class 2 message from the driver door module (DDM) indicating that the specific door ajar switch is active. The DIC displays the XX DOOR AJAR message when the vehicle is not in park or neutral. The IPC sends a class 2 message to the radio in order to activate an audible warning.

    • The DRIVERS DOOR AJAR -- 8 message displays when the DDM detects that the driver door is open or ajar (signal circuit is low).
    • The LEFT REAR DOOR AJAR -- 13 message displays when the left rear door module (LRDM) detects that the left rear door is open or ajar (signal circuit is low). The LRDM sends a message to the DDM via the door module serial data circuit.
    • The PASSENGER DOOR AJAR -- 21 message displays when the passenger door module (PDM) detects that the passenger door is open or ajar (signal circuit is low). The PDM sends a message to the DDM via the door module serial data circuit.
    • The RIGHT REAR DOOR AJAR -- 22 message displays when the right rear door module (RRDM) detects that the right rear door is open or ajar (signal circuit is low). The RRDM sends a message to the DDM via the door module serial data circuit.

Electrical System Indicator(s)

SERVICE VEHICLE SOON -- 23

The DIC displays the SERVICE VEHICLE SOON -- 23 message when any of the following occur:

    • The PCM detects certain non-emissions related failures. The DIC receives a class 2 message from the PCM requesting illumination. The IPC sends a class 2 message to the radio in order to activate an audible warning.
    • The DIM detects certain ignition switch related failures. The DIC receives a class 2 message from the DIM requesting illumination. The IPC sends a class 2 message to the radio in order to activate an audible warning.

Engine Coolant Indicators

ENGINE HOT...A/C OFF-9

The DIC displays the ENGINE HOT...A/C OFF-9 message when the dash integration module (DIM) determines that the coolant temperature is above the normal operating range and the air conditioning is on. The air conditioning compressor is disabled. The DIC receives a class 2 message from the DIM requesting illumination. The IPC sends a class 2 message to the radio in order to activate an audible warning.

HOT...IDLE ENGINE-32

The DIC displays the HOT...IDLE ENGINE-32 message when the IPC determines that the coolant temperature is above the normal operating range. The DIC receives a class 2 message from the IPC requesting illumination. The IPC sends a class 2 message to the radio in order to activate an audible warning.

HOT...REDUCE ENGINE RPM-10

The DIC displays the HOT...REDUCE ENGINE RPM-10 message when the PCM determines that the coolant temperature is above the normal operating range. The DIC receives a class 2 message from the PCM requesting illumination. The IPC sends a class 2 message to the radio in order to activate an audible warning.

HOT...STOP ENGINE-11

The DIC displays the HOT...STOP ENGINE-11 message when the PCM determines that there is a problem with the cooling system. The DIC receives a class 2 message from the PCM requesting illumination. The IPC sends a class 2 message to the radio in order to activate an audible warning.

LOW ENGINE COOLANT-15

The DIC displays the LOW ENGINE COOLANT-15 message when the IPC detects a high voltage level on the signal circuit, a low coolant level condition. The DIC receives a class 2 message from the IPC requesting illumination.

Engine Oil Indicator(s)

CHANGE OIL NOW -- 2

The DIC displays the CHANGE OIL NOW -- 2 message when the PCM determines that the engine oil life has reached 0%. The DIC receives a class 2 message from the PCM requesting illumination. The IPC sends a class 2 message to the radio in order to activate an audible warning. Once the oil is changed, perform the engine oil monitor reset procedure in order to clear the CHANGE OIL NOW message. Refer to GM Oil Life System Resetting in Maintenance and Lubrication.

CHANGE OIL SOON -- 3

The DIC displays the CHANGE OIL SOON -- 3 message when the PCM determines that the engine oil life is less than 11%. The DIC receives a class 2 message from the PCM requesting illumination. The IPC sends a class 2 message to the radio in order to activate an audible warning. Once the oil is changed, perform the engine oil monitor reset procedure in order to clear the CHANGE OIL NOW message. Refer to GM Oil Life System Resetting in Maintenance and Lubrication.

CHECK OIL LEVEL -- 5

The DIC displays the CHECK OIL LEVEL -- 5 message when the PCM detects a low engine oil level condition (signal circuit is high). The IPC sends a class 2 message to the radio in order to activate an audible warning.

LOW OIL PRESSURE -- 17

The DIC displays the LOW OIL PRESSURE -- 17 message when the PCM detects low oil pressure (signal circuit is low). The IPC sends a class 2 message to the radio in order to activate an audible warning.

Low Oil Pressure

The IPC illumination the low oil pressure indicator when any of the following occur:

    • The PCM detects low oil pressure (signal circuit is low). The IPC sends a class 2 message to the radio in order to activate an audible warning.
    • The IPC performs the displays test at the start of each ignition cycle. The indicator illuminates for approximately 5 seconds.

Fasten Safety Belt Indicator

The IPC illuminates the fasten safety belt indicator when any of the following occur:

    • The inflatable restraint sensing and diagnostic module (SDM) detects that the driver's seat belt is unbuckled. The IPC receives a class 2 message from the SDM requesting illumination. The IPC illuminates the indicator for 20 seconds and then flashes the indicator for 55 seconds. The IPC also sends a class 2 message to the radio in order to activate the audible warning.
    • The IPC performs the displays test at the start of each ignition cycle. The indicator illuminates for approximately 5 seconds.

Fuel System Indicator(s)

CHECK GAS CAP -- 36

The DIC displays the CHECK GAS CAP -- 36 message when the PCM detects a malfunction in the evaporative emissions system or the gas cap is not seated properly. The DIC receives a class 2 message from the PCM requesting illumination. The IPC sends a class 2 message to the radio in order to activate an audible warning.

LOW FUEL -- 16

The DIC displays the LOW FUEL -- 16 message when the PCM determines that the fuel level is less than 16%. The DIC receives a class 2 message from the PCM requesting illumination. The IPC sends a class 2 message to the radio in order to activate an audible warning.

Lighting System Indicator(s)

Fog Lamp

The IPC illuminates the fog lamp indicator when any of the following occur:

    • The instrument panel integration module (IPM) detects that the fog lamps are requested. The IPC receives a class 2 message from the IPM requesting illumination.
    • The IPC performs the displays test at the start of each ignition cycle. The indicator illuminates for approximately 5 seconds.

HEADLAMPS SUGGESTED -- 27

The DIC displays the HEADLAMPS SUGGESTED -- 27 message when the DIM determines that the ambient light conditions require headlamp illumination. The IPC sends a class 2 message to the radio in order to activate an audible warning.

High Beam

The IPC illuminates the high beam indicator when the dash integration module (DIM) detects that the high beams are requested. The IPC receives a class 2 message from the DIM requesting illumination.

TURN SIGNAL ON? -- 24

The DIC displays the TURN SIGNAL ON? -- 24 message when the IPC determines that the turn signal is active for more than 1.29 km (0.8 mi). The IPC sends a class  2 message to the radio in order to activate the audible warning.

Turn Signals

The IPC illuminates the right or left turn signal indicator when the IPC detects a turn signal request or a hazard request. If the IPC determines that the turn signal is active for more than 1.29 km (0.8 mi), the IPC sends a class  2 message to the radio in order to activate the audible warning.

Malfunction Indicator Lamp (MIL)

The PCM illuminates the MIL (service engine soon or check engine) when the following occurs:

    • The PCM detects a malfunction in the emissions system.
    • The PCM performs the displays test at the start of each ignition cycle. The indicator illuminates for approximately 3 seconds.
    • The ignition is on, with the engine off.

Stability System Indicators

Reference numbers are used in conjunction with a DIC warning message on export vehicles only.

SERV STABILITY SYS -- 26

The DIC displays the SERV STABILITY SYS -- 26 message when any of the following occur:

    • The EBCM determines a fault in the stability system. The DIC receives a class 2 message from the EBCM requesting illumination. The IPC sends a class 2 message to the radio in order to activate an audible warning.
    • The DIC detects a loss of class 2 communications with the EBCM.

STABILITY ACTIVE -- 42

The DIC displays the STABILITY ACTIVE -- 42 message when the EBCM detects a stability system event. The DIC receives a class 2 message from the EBCM requesting illumination.

Theft System Indicator(s)

SECURITY

The IPC illuminates the SECURITY indicator as determined by the vehicle theft deterrent (VTD) system and the content theft deterrent (CTD) system. The IPC receives a class 2 message from the rear integration module (RIM) or the theft deterrent control module requesting illumination.

    • The VTD system requests the IPC to illuminate the indicator only when the ignition switch is ON. The VTD system uses the indicator in order to identify system status.
    • The IPC detects a loss of class 2 communications with either the RIM or the theft deterrent control module.
    • The IPC performs the displays test at the start of each ignition cycle. The indicator illuminates for approximately 5 seconds.

STARTING DISABLED -- 33

The DIC displays the STARTING DISABLED -- 33 message when the theft deterrent control module disables the vehicle from starting. The DIC receives a class 2 message from the theft deterrent control module requesting illumination. The IPC sends a class 2 message to the radio in order to activate an audible warning.

THEFT ATTEMPTED -- 25

The DIC displays the THEFT ATTEMPTED -- 25 message when the rear integration module (RIM) detects a potential vehicle theft. The DIC receives a class  2 message from the RIM requesting illumination. The IPC sends a class 2 message to the radio in order to activate an audible warning.

THEFT SYSTEM FAULT -- 12

The DIC displays the THEFT SYSTEM FAULT -- 12 message when the theft deterrent control module detects a malfunction in the theft system . The DIC receives a class 2 message from the theft deterrent control module requesting illumination.

Tire Pressure Indicator

LOW TIRE PRESSURE -- 18

The DIC displays the LOW TIRE PRESSURE -- 18 message when the electronic brake control module (EBCM) detects low pressure in any of the four tires. The DIC receives a class 2 message from the EBCM requesting illumination. The IPC sends a class 2 message to the radio in order to activate an audible warning.

Traction Control System Indicators

TRAC OFF

The IPC illuminates the TRAC OFF indicator when any of the following occur:

    • The electronic brake control module (EBCM) inhibits the traction control system due to a malfunction in the traction control system. The IPC receives a class 2 message from the EBCM requesting illumination. The IPC sends a class 2 message to the radio in order to activate an audible warning.
    • The IPM detects that the traction control switch is pressed. The IPC receives a class 2 message from the IPM requesting illumination.
    • The IPC receives a class 2 message from the EBCM requesting illumination of the ABS indicator.
    • The IPC detects a loss of class  2 communications with the EBCM, and the discrete back-up ABS signal circuit is high.
    • The IPC performs the displays test at the start of each ignition cycle. The indicator is illuminated for approximately 5 seconds.

TRAC ON

The IPC illuminates the TRAC ON indicator when any of the following occur:

    • The electronic brake control module (EBCM) detects a traction control event. The IPC receives a class 2 message from the EBCM requesting illumination.
    • The IPC performs the displays test at the start of each ignition cycle. The indicator is illuminated for approximately 5 seconds.

Transmission Indicator(s)

TRANS HOT...IDLE ENG -- 6

The DIC displays the TRANS HOT...IDLE ENG -- 6 message when the PCM determines that the transmission fluid temperature is greater than or equal to 135°C (275°F). The DIC receives a class 2 message from the PCM requesting illumination. The IPC sends a class 2 message to the radio in order to activate an audible warning.

Trunk Ajar Indicator

TRUNK AJAR -- 28

The DIC displays the TRUNK AJAR -- 28 indicator when the rear integration module (RIM) detects that the trunk is open or ajar. The DIC receives a class 2 message form the RIM requesting illumination. The IPC sends a class 2 message to the radio in order to activate an audible warning.

Washer Fluid Indicator

LOW WASHER FLUID -- 19

The DIC displays the LOW WASHER FLUID -- 19 message when the IPC detects a low washer fluid condition (signal circuit is low). The DIC receives a class 2 message from the IPC requesting illumination. The IPC sends a class 2 message to the radio in order to activate an audible warning.