GM Service Manual Online
For 1990-2009 cars only

DIC Switches

DSPL MODE

Briefly pressing the DSPL MODE button will change the instrument panel cluster (IPC) display. The IPC can be displayed in one of the following formats:

    • IPC gages only
    • IPC gages and digital speed display
    • Digital speed display only

ENG/MET

Briefly pressing the ENG/MET button will change the IPC and driver information center (DIC) displays between English and metric units.

INFO Up and INFO Down

The INFO button consists of 2 positions:

    • INFO Up -- Briefly pressing the top of the INFO button will scroll up to the next DIC display parameter.
    • INFO Down -- Briefly pressing the bottom of the INFO button will scroll down to the next DIC display parameter.

INFO RESET

Briefly pressing the INFO RESET button will acknowledge the currently displayed DIC message or reset the currently displayed DIC parameter.

ON/OFF

The ON/OFF button is used for the following functions:

    • Feature Programming -- Briefly pressing the ON/OFF button will turn the currently displayed parameter on or off.
    • Timer -- Briefly pressing the ON/OFF button will start or stop the timer.

TRIP RESET A/B

The TRIP button consists of 2 positions:

    • TRIP RESET -- Briefly pressing the top of the TRIP button will reset the displayed trip odometer to zero.
    • TRIP A/B -- Briefly pressing the bottom of the TRIP button will change the display of the trip odometer between trip A and trip B.

Indicators and Warning Messages

for further information on indicators and warning messages, refer to Indicator/Warning Message Description and Operation .

Vehicle Information Display

The vehicle information display parameters are available to the driver when the ignition is in the RUN position. The driver navigates through the various parameters displayed on the DIC using the INFO Up and INFO Down buttons of the DIC. Some parameters can be reset using the INFO RESET button.

Some parameters require information from other modules. If the IPC has not received data for a parameter when the time has come to display the parameter, the IPC will blank the display on the DIC. If the IPC has determined that a class 2 communication failure with one of the modules exists when the time has come to display the parameter, the IPC will display dashes on the DIC.

The vehicle information display parameters are displayed in the following order:

  1. OUTSIDE TEMP
  2. RANGE
  3. MPG AVG
  4. MPG INST
  5. FUEL USED
  6. AVG MPH
  7. TIMER
  8. BATTERY VOLTS
  9. TIRE PRESSURE
  10. ENGINE OIL LIFE
  11. TRANS FLUID LIFE
  12. PHONE
  13. FEATURE PROGRAMMING
  14. Blank display

When the INFO Up button is pressed, the DIC will display the next parameter on the list. When the INFO Down button is pressed, the DIC will display the previous parameter on the list.

OUTSIDE TEMP

The outside air temperature parameter is supplied by the instrument panel module (IPM) to the IPC via class 2 serial data messages. The outside air temperature parameter is displayed on the DIC in one of the following formats:

    • XXX °F OUTSIDE TEMP
    • XXX °C OUTSIDE TEMP

The XXX represents the supplied temperature value. The units of the display will correspond to the current IPC setting. The outside air temperature parameter cannot be reset by the driver.

RANGE

The fuel range is the estimated distance that the vehicle can travel under the current fuel economy and fuel level conditions. The fuel range parameter is displayed on the DIC in one of the following formats:

    • XXX MILES RANGE
    • XXX km RANGE
    • LOW RANGE

The XXX represents the calculated range value. The units of the display will correspond to the current IPC setting. The LOW RANGE message is displayed when the range is calculated to be less than 64 km (40 miles). The fuel range parameter cannot be reset by the driver.

MPG AVG

The average fuel economy is the distance travelled divided by the fuel used since the parameter was last reset. The average fuel economy parameter is displayed on the DIC in one of the following formats:

    • XX.X MPG AVG
    • XX.X L/100km AVG
    • XX.X km/L AVG

The XX.X represents the calculated average fuel economy value. The units of the display will correspond to the current IPC setting. When MPG AVG is displayed on the DIC, briefly pressing the INFO RESET button on the DIC will reset the average fuel economy parameter. The DIC will display 0.0 for the English mode, 0.0 for the Japan mode, and 99.9 for the metric mode when the parameter is reset.

MPG INST

The instantaneous fuel economy parameter is a function of distance divided by fuel used over a short period of time. The instantaneous fuel economy parameter is displayed on the DIC in one of the following formats:

    • XX MPG INST
    • XX L/100km INST
    • XX km/L INST (Japan metric)

The XX represents the calculated instantaneous fuel economy value. The units of the display will correspond to the current IPC setting. The instantaneous fuel economy parameter cannot be reset by the driver. The DIC will display 0 for the English mode, 0 for for the Japan mode, and 99 for the metric mode after the battery has been disconnected and then reconnected.

FUEL USED

The fuel used parameter is the amount of fuel that has been used since the parameter was last reset. The fuel used parameter is displayed on the DIC in one of the following formats:

    • XX.X GAL FUEL USED
    • XXX.X L FUEL USED

The XXX.X represents the calculated fuel used value. The units of the display will correspond to the current IPC setting. The DIC will display a range from 0.0 to 99.9 GAL in the English mode and from 0.0 to 999.9 L for the metric mode. When FUEL USED is displayed on the DIC, briefly pressing the INFO RESET button on the DIC will reset the fuel used parameter.

AVG MPH

The average vehicle speed parameter is a function of the vehicle speed over the time since the parameter was last reset. The average vehicle speed parameter is displayed on the DIC in one of the following formats:

    • XXX.X AVG MPH
    • XX.X AVG km/h

The XXX.X represents the calculated average vehicle speed value. The units of the display will correspond to the current IPC setting. When AVG MPH is displayed on the DIC, briefly pressing the INFO RESET button on the DIC will reset the average vehicle speed parameter.

TIMER

The timer is used to record elapsed time. The timer is displayed on the DIC in one of the following formats:

    • XX:XX:XX TIMER (ON)
    • XX:XX:XX TIMER (OFF)

The first XX represents hours elapsed, the second XX represents minutes elapsed, and the third XX presents seconds elapsed. The ON or OFF is a fixed display on the DIC and indicates whether the timer is currently running. The timer is started and stopped by pressing the ON/OFF button on the DIC. The maximum range of the timer is 99 hours, 59 minutes, and 59 seconds. After the maximum range is reached, timer will reset and display all zeros (00:00:00). When TIMER is displayed on the DIC, briefly pressing the INFO RESET button on the DIC will reset the timer.

BATTERY VOLTS

The battery voltage parameter is supplied by the dash integration module (DIM) to the IPC via class 2 serial data messages. The voltage is displayed on the DIC in one of the following formats:

    • XX.X BATTERY VOLTS OK
    • XX.X BATTERY VOLTS LOW
    • XX.X BATTERY VOLTS HIGH

The XX.X represents the supplied battery voltage value. The battery voltage value will range between 0.0 and 17.0 volts. The battery voltage parameter cannot be reset.

TIRE PRESSURE (w/UJ6)

The tire pressure monitor is an available vehicle option, when equipped the tire pressure parameter is supplied by the remote control door lock receiver (RCDLR) to the IPC via class 2 serial data messages. The tire pressure parameter cannot be reset by the driver. The tire pressure is displayed on the DIC in one of the following formats:

    • XX PSI LF TIRE OK
    • XX kPa LF TIRE OK
    • XX PSI LF TIRE LOW
    • XX kPa LF TIRE LOW
    • XX PSI LF TIRE HIGH
    • XX kPa LF TIRE HIGH
    • XX PSI LR TIRE OK
    • XX kPa LR TIRE OK
    • XX PSI LR TIRE LOW
    • XX kPa LR TIRE LOW
    • XX PSI LR TIRE HIGH
    • XX kPa LR TIRE HIGH
    • XX PSI RF TIRE OK
    • XX kPa RF TIRE OK
    • XX PSI RF TIRE LOW
    • XX kPa RF TIRE LOW
    • XX PSI RF TIRE HIGH
    • XX kPa RF TIRE HIGH
    • XX PSI RR TIRE OK
    • XX kPa RR TIRE OK
    • XX PSI RR TIRE LOW
    • XX kPa RR TIRE LOW
    • XX PSI RR TIRE HIGH
    • XX kPa RR TIRE HIGH

The XX represents the supplied tire pressure value. The units of the display will correspond to the current instrument cluster setting.

ENGINE OIL LIFE

The engine oil life parameter is calculated by the powertrain control module (PCM) via class 2 serial data messages. The engine oil life is displayed as XXX% ENGINE OIL LIFE. The XXX represents the calculated engine oil life value. The value will range between 100% and 0%. Once the engine oil has been changed, perform the engine oil monitor reset procedure. Refer to GM Oil Life System Resetting in Maintenance and Lubrication.

TRANS FLUID LIFE

The transmission fluid life parameter is calculated by the PCM. The PCM provides the information to the IPC via class 2 serial data messages. The transmission fluid life is displayed as XXX% TRANS FLUID LIFE. The XXX represents the calculated transmission fluid life value. The value will range between 100% and 0%. Once the transmission fluid has been changed, perform the transmission fluid monitor reset procedure. Refer to Automatic Transmission or Transaxle Fluid Change Indicator Resetting in Maintenance and Lubrication.

PHONE (w/UV8)

An integrated cellular telephone is an available vehicle option. When equipped, the cellular telephone displays are integrated into the IPC to allow the display of phone status information on the DIC. The telephone displays on the DIC are intended to resemble the information displayed on the cellular telephone handset, so the driver can perform hands-free operation of the cellular telephone. The cellular telephone provides the information to the IPC via class 2 serial data messages.

During phone digit dialing, the display will include up to 14 digits. The digits will start at the far right of the display and scroll from right to left as more digits are dialed. When the CLEAR button of the telephone handset is pressed, the last digit pressed will be deleted from the telephone handset and the DIC display.

Phone Alphanumeric Display

The display indicates a recall of a text string or of a phone number from a memory location. The display will include the received signal strength indicator display. The phone alphanumeric display is displayed as PHONE -- XX XXXXXXXXXX. The 2 digit XX represents the number for the memory location in the cellular telephone. The 10 digit XXXXXXXXX represents the text string or the phone number stored in the memory location. A text string may contain letters and numbers.

Received Signal Strength Indicator

The display indicates the signal strength from the cell site that the cellular telephone is currently detecting. The received signal strength indicator uses the 3 characters following PHONE on the DIC. Each character is capable of displaying 5 bars to represent signal strength. The DIC can display the signal strength level within the range of 0 to 15. The following cellular telephone message displays include the signal strength indicator:

    • PHONE -- CALL
    • PHONE TIMER XX:XX
    • Phone Incoming Caller ID
    • PHONE -- LOCKED
    • PHONE -- ON
    • PHONE -- PAUSE
    • PHONE -- ROAM A
    • PHONE -- ROAM B
    • PHONE -- VOL

PHONE -- CALL

The message indicates that an incoming call has been received by the cellular telephone. The message can be displayed as a driver status message.

PHONE TIMER XX:XX

The display indicates the length of time a call is in progress or the length of time that the running call timer is displayed. The phone call timer is displayed as PHONE -- TIMER XX:XX. The first XX represents the minutes elapsed and the second XX represents the seconds elapsed. The display can be displayed as a driver status message.

The timer can be set to display the time for an individual call or set to display the running call time. The programming function is performed through the cellular telephone handset.

Phone Incoming Caller ID

The display indicates an incoming telephone call has been received by the cellular telephone, and the caller's ID can be identified. The phone incoming caller ID is displayed as PHONE -- XXXXXXXXXX. The 10 digit XXXXXXXXX represents the text string or phone number of the incoming caller. A text string may contain letters and numbers.

PHONE -- LOCKED

The message indicates that the cellular telephone is currently locked and that an unlock code is required to use the cellular telephone. The message can be displayed as a driver status message or in the vehicle information display.

PHONE -- NO HANDSET

The message indicates that the cellular telephone handset is physically disconnected. The message can be displayed as a driver status message or in the vehicle information display.

PHONE -- NO SERVICE

The message indicates that the cellular telephone service is not currently available. The message can be displayed as a driver status message or in the vehicle information display.

PHONE -- NOT PRESENT

The message indicates that the vehicle is configured to have a cellular telephone, but the cellular telephone is not communicating with the IPC. Under the above conditions, the message will be displayed when either the cellular telephone status is displayed in the vehicle information display or the driver activates the cellular telephone by pressing the PHONE or RECALL buttons on the steering wheel controls.

PHONE -- OFF

The message indicates that the cellular telephone power button is in the OFF state. The message can be displayed as a driver status message or in the vehicle information display.

PHONE -- ON

The message indicates that the cellular telephone power button is in the ON state, but no other active conditions currently exist. The message can be displayed as a driver status message or in the vehicle information display.

PHONE -- PAUSE

The message indicates that the cellular telephone is currently in pause status. The message can be displayed as a driver status message.

PHONE -- ROAM A

The message indicates that the cellular telephone is currently in roam A status. The message can be displayed as a driver status message or in the vehicle information display.

PHONE -- ROAM B

The message indicates that the cellular telephone is currently in roam B status. The message can be displayed as a driver status message or in the vehicle information display.

PHONE -- VOL

The display indicates the level of the cellular telephone volume. The phone handset displays PHONE which is followed by 3 blank characters on the DIC. After the 3 blank characters, the phone handset displays VOL and a blank character on the DIC. The following 7 characters are used to display the level of the phone volume. Each character is capable of displaying 5 bars to represent volume. The DIC can display the phone volume level within the range of 0 to 35. The display can be displayed as a driver status message.

FEATURE PROGRAMMING

Personalization features may be set for the vehicle or for the driver. Vehicle features do not change with each driver. Specific drivers are recognized by the vehicle through the keyless entry transmitters, the memory buttons, or the DIC.

For further information, refer to Driver Personalization in Personalization.