2008 Gmc Sierra 2500hd

jmac4 · March 18, 2008

If anyone could help it would be appreciated, I recently bought a 2008 GMC Sierra 2500HD and I do not have the DIC for mpg anyone know if you can take it to a gm dealer and have them flash the computer so that you can actually read the mpg on you dash controller or dic, please help

cammiller · March 18, 2008

Not an option. with out the buttons on the dash, there is no way to accomplish this at a dealer.

hubbycap · March 18, 2008

DIC is under $100 for buttons. Then all DIC functions are available. Easy install and instantly recognize the buttons w/no dealer programming necessary.

cammiller · March 18, 2008

Interesting, I have not heard that. Is this something you have tried hubbycap? Do you have to replace the facia where the buttons mount?

jmac4 · March 18, 2008

Do you know where I can actually get the dic buttons and installation instructions? Thanks for the help

hubbycap · March 18, 2008

Mine was equipped with it. There has been much discussion on it on this forum, search "DIC upgrade" and there is a bunch of posts, surely the part number is mentioned. The new section of bezel comes with it. Really just a few minute upgrade.

hubbycap · March 18, 2008

Here is THE thread with instructions and part number:

DIC Upgrade Thread

Has most in info you need on this.

Fred

jmac4 · March 18, 2008

Thanks a lot for the help I appreciate it

hubbycap · March 18, 2008

Thanks a lot for the help I appreciate it

You're welcome and WELCOME to the forum.

mikiehews · March 18, 2008

A LITTLE SOMETHING I DUG UP:

Driver Information Center (DIC) Description and Operation Table 1:Fuel DisplayTable 2:Trip DisplayThe driver information center (DIC) displays DIC WOW for 5 seconds when it first powers up. If enabled through Personalization, the DIC then returns to the last display status before no power condition.

There are 4 switch functions for the DIC.

• Personalization

• Set/Reset

• Trip/Fuel

• Vehicle Info

Trip/Fuel

The Trip/Fuel switch is used to navigate between vehicle information parameters. Cycle through the following vehicle parameters by successive pressing of the Trip/Fuel switch

• Average Fuel Economy (AFE)

• Fuel Range

• Fuel Used

• Instantaneous Fuel Economy (IFE)/Active Fuel Management (Displacement on Demand (DOD))

• Odometer

• Trans Temp

• Trip Odometer

• Trip Time

• Blank

Vehicle Info

The Vehicle Info switch is used to navigate between vehicle information parameters. Cycle through the following vehicle parameters by successive pressing of the Vehicle Info switch.

• Blank Display

• English/Metric Units

• Key Fob Programming Menu

• Left Front Tire Pressure

• Left Rear Tire Pressure

• Oil Life Index (OLI)

• Right Front Tire Pressure

• Right Rear Tire Pressure

• Tire Programming Menu

• Engine Hours

Personalization

The Personalization switch is used to set personalization features for both the vehicle and the driver. Many of the parameters in the Trip/Fuel menu and the Vehicle Info menu can be programmed through the Personalization switch. In addition to the parameters in the Trip/Fuel and Vehicle Info menus, the following features can also be programmed.

• Approach Lighting

• Automatic Door Lock

• Automatic Door Unlock

• Chime Volume

• Delayed Door Lock

• Display Language

• Easy Exit Seat

• Exit Lighting

• Memory Seat Recall

• Remote Door Lock

• Remote Door Unlock

• Remote Start

• 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 serial data 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.

Oil Life Remaining

The ECM sends the oil life remaining percentage to the IPC via a serial data message. The instrument panel cluster receives a serial data 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 serial data message with the fuel 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 serial data 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 serial data 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

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

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

English/Metric

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

Trip Odometer

The trip odometer can be accessed through the DIC Trip/Fuel switch function. The trip odometer shows the current distance traveled in either miles or kilometers since the last reset of the trip odometer. The trip odometer can be reset to zero by pressing the set/reset button while the trip odometer is displayed.

The trip odometer has a feature called the retro-active reset. This can be used to set the trip odometer to the number of miles (kilometers) driven since the ignition was last turned on. This can be used if the trip odometer is not reset at the beginning of the trip.

To use the retro-active reset feature, press and hold the set/reset button for at least four seconds. The trip odometer will display the number of miles (mi) or kilometers (km) driven since the ignition was last turned on and the vehicle was moving. Once the vehicle begins moving, the trip odometer will accumulate mileage.

Trip Display

DIC Trip Display

Range

Metric

English

ODOMETER

######km

######MI

TRIP ODOMETER

####.#km

####.#MI

Language

The DIC is capable of displaying in 8 languages

jmac4 · March 18, 2008

Do all these functions work with the aftermarket dic upgrade, or in other word does the computer recognize the upgraded dic controller

nbscanuck · March 18, 2008

I have completed the DIC upgrade and works like a dream. Simple to do. Order the panel and the DIC switch (my parts guy was cheaper as two parts instead of one), rip the old panel out, pull the headlight switch off the back, insert headlight switch into new panel, connect wire harness (which is actually connected to the back of the existing panel) and presto YOUR DONE. If it takes you more than 15 minutes for the whole process, something has gone horribly wrong.

Now that I have done this, I just can't keep my hands of my DIC