Chevrolet Silverado / GMC Sierra. Service manual — part 2439

Park Tilt Mirrors

Smart High Beams

Average Fuel Economy

Average fuel economy is calculated using the equation: AFE = Distance/Fuel

Distance = The accumulated distance travelled since the last reset of this value

Fuel = The accumulated fuel consumption since the last reset of this value

The engine control module (ECM) sends the average fuel economy GMLAN message to the
instrument panel cluster (IPC). The value of this mode is retained during ignition OFF and can be
changed between English units and metric units by selecting from the driver information center
(DIC) options menu.

Average Speed

Average speed is calculated using the equation: Average Speed = AVS Distance/AVS Time

Distance = The accumulated distance travelled since the last reset of this value

Ignition On = The accumulated ignition on time since the last reset of this value

Oil Life Remaining

The ECM sends the oil life remaining percentage to the IPC via GMLAN message. The
instrument panel cluster receives a GMLAN message indicating the engine oil life remaining. The
DIC displays the current percentage of the GM Oil Life System as determined by the ECM.
When the oil life remaining percentage drops below 5 percent, the DIC displays CHANGE
ENGINE OIL SOON. When the engine oil is changed, reset the GM Oil Life System. Refer to
GM Oil Life System Resetting .

Fuel Range

This message indicates the estimated distance that the vehicle can travel under the current fuel
economy and fuel level conditions since the last battery connection to the IPC. Fuel Range is
calculated using the equation: Fuel Range = Range Distance/Range Fuel Used.

Range Distance = The accumulated distance travelled since the last reset of this value.

Fuel Used = The accumulated fuel delivered since the last reset of this value

The ECM sends the fuel range value to the IPC. The IPC receives a GMLAN message with fuel

2008 Chevrolet Silverado 1500

2008 ACCESSORIES & EQUIPMENT Displays and Gages - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado

information. The fuel range value is retained during ignition OFF and can be changed between
English and Metric units by accessing the DIC English/Metric menu. The Fuel Range display
cannot be reset. LOW is displayed when fuel range is below a predetermined value.

Fuel Used

The DIC calculates and displays the total amount of fuel used since the last reset operation. You
can reset the fuel used mode by depressing and holding the Set/Reset button for more than 3
seconds. The value of this mode is retained during ignition OFF.

Instantaneous Fuel Economy (IFE)

Instantaneous fuel economy (IFE) is calculated using the equation: IFE = Distance/Fuel Used.

Distance = The accumulated distance travelled for the last 2 seconds

Fuel = The accumulated fuel delivered for the last 2 seconds

The IPC receives a GMLAN message from the ECM. The distance information is calculated by
the IPC using the vehicle speed information from the ECM. These values are retained during
ignition OFF and can be changed between English and Metric units accessing the DIC
English/Metric menu. The IFE display cannot be reset.

Tire Pressure Monitor

The IPC receives a GMLAN message from the tire pressure monitoring (TPM) system for front
and rear tire pressure data. The DIC will display the pressure for each of the front and rear tires.
When a tire with low air pressure is present, the DIC displays XXXX XXXX TIRE PRESSURE
LOW.

Trip Time

The timer records elapsed time starting from activation. When the DIC displays the timer,
pressing the Set/Reset switch for 1 second on the DIC resets the timer. Pressing the Set/Reset
button on the DIC switch for approximately 1 second starts and stops the timer. The DIC displays
the timer in one of the following formats:

The DIC displays the timer in the following format: XX: XX:XX:

The first XX represents hours elapsed, the second XX represents minutes elapsed, and the third
XX represents seconds elapsed. The maximum range of the timer is 99 hours, 59 minutes, and 59
seconds. After the maximum range is reached, the timer displays all zeros (00:00:00).

Park Assist Menu

2008 Chevrolet Silverado 1500

2008 ACCESSORIES & EQUIPMENT Displays and Gages - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado

The park assist menu is displayed in the DIC. The DIC displays the current state of the park assist
until the IPC receives a message indicating otherwise. The DIC displays (- - -) when
communication with park assist is lost.

Fuel Display

English/Metric

The English/Metric mode is used to toggle between English and Metric units and can be accessed
through the driver information center (DIC) Vehicle Info switch.

Trip A/B

The trip odometer A or B can be accessed through the DIC Trip/Fuel switch function.

Trip Display

Language

The driver information center (DIC) is capable of displaying in 8 languages

English

German

Italian

French

Spanish

Arabic

Parameter

Update Rate

Range

Reset Value

Units

Average Fuel

Economy

1 second

0.0-99.9

99.9

MPG or L/100

KM

Instant Fuel

Economy

2 seconds

0-70

N/A

MPG or L/100

KM

Fuel Range

1 second

0-999

N/A

MI/KM

Fuel Used

1 second

0-999.9

0.0

Gal/L

DIC Trip Display

Range

Metric

English

ODOMETER

######km

######MI

TRIP A

####.#km

####.#MI

TRIP B

####.#km

####.#MI

2008 Chevrolet Silverado 1500

2008 ACCESSORIES & EQUIPMENT Displays and Gages - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado

Chinese

Korean

INDICATOR/WARNING MESSAGE DESCRIPTION AND OPERATION

Indicators

Symbol

Reference

ABS: Refer to ABS Description and

Operation (With JL4) or ABS Description

and Operation (Without JL4)

Air Bag: Refer to SIR System Description

and Operation

Brake: Refer to Brake Warning System

Description and Operation

2008 Chevrolet Silverado 1500

2008 ACCESSORIES & EQUIPMENT Displays and Gages - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado