Instrument Panel, Gauges & Console: Overview GMC Sierra 2500

Test Description

The numbers below refer to the step numbers on the diagnostic table.

1. 2) Lack of communication may be due to a partial malfunction of the class 2 serial data circuit or due to a total malfunction of the class 2 serial data circuit. The specified procedure will determine the particular condition.
2. 4) The symptom list in Symptoms will determine the correct diagnostic procedure to use.
3. 5) The presence of DTCs which begin with "U" indicate some other module is not communicating. The specified procedure will compile all the available information before tests are performed.

The number(s) below refer to the step number(s) on the diagnostic table.

1. 2) Lack of communication may be due to a partial malfunction of the class 2 serial data circuit or due to a total malfunction of the class 2 serial data circuit. The specified procedure will determine the particular condition.
2. 3) The symptom list in Symptoms will determine the correct diagnostic procedure to use.
3. 4) The presence of DTCs which begin with "U" indicate some other module is not communicating. The specified procedure will compile all the available information before tests are performed.

The number(s) below refer to the step number(s) on the diagnostic table.

1. 2) Lack of communication may be due to a partial malfunction of the class 2 serial data circuit or due to a total malfunction of the class 2 serial data circuit. The specified procedure will determine the particular condition.
2. 3) The symptom list in Symptoms will determine the correct diagnostic procedure to use.
3. 4) The presence of DTCs which begin with "U" indicate some other module is not communicating. The specified procedure will compile all the available information before tests are performed.

Scheme 3

Scheme 4

The number below refers to the step number on the diagnostic table.

1. 3) - Tests for the proper operation of the circuit in the high voltage range

The number below refers to the step number on the diagnostic table.

1. 3) Tests for the proper operation of the circuit in the low voltage range.

The number below refers to the step number on the diagnostic table.

1. 3) - Tests for the proper operation of the circuit in the high voltage range.

The number below refers to the step number on the diagnostic table.

1. 3) Tests for the proper operation of the circuit in the low voltage range.

Symptoms - Instrument Panel, Gages & Console

Important: The following steps must be completed before using the symptom tables.

1. Perform «Diagnostic System Check - Instrument Cluster»(ref-176702-S38339220362005051000000) , «Diagnostic System Check - Driver Information Systems»(ref-176702-S21608953032005051000000) or «Diagnostic System Check - Audible Warnings»(ref-176702-S27739693482005051000000) before using the Symptoms in order to verify that all of the following are true: There are no DTCs set. The control module(s) can communicate via the serial data link.
2. Review the system operation in order to familiarize yourself with the system functions. Refer to the following: See «Instrument Panel Cluster (IPC) Description & Operation»(ref-176702-S29316028212005051000000) . See «Driver Information Center (DIC) Description & Operation»(ref-176702-S11854875302005051000000) . See «Audible Warnings Description & Operation»(ref-176702-S32042800312005051000000) .

The number(s) below refer to the step number(s) on the diagnostic table.

1. 3) - This step tests for high resistance in the signal circuits and the low reference circuit of the fuel level senders.
2. 13) - DTCs will be set in the PCM when you perform this diagnostic table.

The number below refer to the step number on the diagnostic table.

1. 3) - This step tests for high resistance in the signal circuit and the low reference circuit of the fuel level sender.
2. 13) - DTCs will be set in the PCM when you perform this diagnostic table.

Scheme 5

Scheme 6

Scheme 7

Scheme 8

Scheme 9

Scheme 10

Scheme 11

Scheme 12

Scheme 13

Scheme 14

Scheme 15

Console Description

The front floor console is located between the driver and passenger seats. The console fits over the tunnel in the floor of the vehicle. The console extends from under the center of the instrument panel (I/P) to just behind the driver's seat.

The console is equipped with the following items

1. A 12-volt power outlet
2. A driver's side cup holder
3. A passenger's side cup holder

The console storage compartment is located at the rear of the console and is locked and unlocked by a console key. The storage compartment also may contain a cassette tape/compact disc holder.

On select GMC vehicles the console may contain, in addition to the above, the following

1. A driver's thermo cupholder
2. A thermo cooler located in the console storage compartment

A thermo cupholder switch, located next to the thermo cupholder, controls the hot and cold mode of the cupholder. In the cold mode the cupholder can reach a temperature of 5°C (41°F). In the hot mode it can reach a temperature of 66°C (151°F).

The thermo cooler can be removed from the console storage compartment and it has its own power feed when it is placed in the console. Low battery voltage protection is provided by a battery monitor which will cut power to the thermo cooler if the battery voltage drops below 11.6 volts. A thermo cooler switch located in the console, next to the thermo cupholder switch, allows the thermo cooler to be turned off or on without removing it from the console storage compartment.

Audible Warnings Description & Operation

The body control module (BCM) produces four audible warnings to alert the driver of a system concern or a critical vehicle condition. If multiple audible warnings requests are received at the same time, the warning with the highest priority will sound first. The following lists the audible warning priority and pulse rate

1. Fast rate chime (150 pulses per min)
2. Medium rate chime (100 pulses per min)
3. Slow rate chime (50 pulses per min)
4. Turn Signal reminder (will pulse @ turn signal flasher rate)