Chevrolet Silverado / GMC Sierra. Service manual — part 2442

SERVICE TRACTION CONTROL

(With JL4) or ABS Description and

Operation (Without JL4)

SERVICE TRAILER BRAKE SYSTEM

Refer to Trailer Brake Controls

Description and Operation

SERVICE TRANSMISSION

Refer to Transmission Indicators and

Messages (TCM) for the 4L60-E/4L65-

E/4L70-E transmission

or

Transmission Indicators and Messages for

the 6L50/6L80/6L90 transmission

or

Transmission Indicators and Messages for

the Allison transmission

SHIFT INHIBITED SELECT N TO RESET

Refer to Transmission Indicators and

Messages (TCM) for the 4L60-E/4L65-

E/4L70-E transmission

or

Transmission Indicators and Messages for

the 6L50/6L80/6L90 transmission

or

Transmission Indicators and Messages for

the Allison transmission

STABILITRAK OFF

Refer to ABS Description and Operation

(With JL4) or ABS Description and

Operation (Without JL4)

STARTING DISABLED THEFT

PROBLEM

Refer to Content Theft Deterrent (CTD)

Description and Operation

STARTING DISABLED SERVICE

THROTTLE

Refer to Throttle Actuator Control (TAC)

System Description

THEFT ATTEMPTED

Refer to Content Theft Deterrent (CTD)

Description and Operation

TIGHTEN GAS CAP

Refer to Indicator/Warning Message

Description and Operation

TIRE LEARNING ACTIVE

Refer to Tire Pressure Monitor

Description and Operation

TRACTION CONTROL OFF

Refer to ABS Description and Operation

(With JL4) or ABS Description and

Operation (Without JL4)

2008 Chevrolet Silverado 1500

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

Silverado

CHANGE ENGINE OIL SOON

The instrument panel cluster (IPC) illuminates the CHANGE ENGINE OIL SOON message
when the engine control module (ECM) determines that the engine oil should be changed. The
IPC receives a class 2 message from the ECM requesting illumination. Once the oil is changed,
perform the engine oil monitor reset procedure in order to clear the Change Engine Oil indicator.
Refer to GM Oil Life System Resetting .

ENGINE OIL LOW

The instrument panel cluster (IPC) illuminates the ENGINE OIL LOW message in the driver
information center (DIC) when the engine control module (ECM) detects a low engine oil level
condition. The ECM only monitors the oil level switch signal circuit for a brief period between
key on and ignition crank. The IPC receives a class 2 message from the ECM requesting
illumination.

TRAILER CONNECTED

Refer to Trailer Brake Controls

Description and Operation

TRAILER NOT CONNECTED

Refer to Trailer Brake Controls

Description and Operation

TRANSMISSION HOT IDLE ENGINE

Refer to Transmission Indicators and

Messages (TCM) for the 4L60-E/4L65-

E/4L70-E transmission

or

Transmission Indicators and Messages for

the 6L50/6L80/6L90 transmission

or

Transmission Indicators and Messages for

the Allison transmission

TURN SIGNAL ON

Refer to Exterior Lighting Systems

Description and Operation

VEHICLE OVERSPEED

Refer to Indicator/Warning Message

Description and Operation

VEHICLE SPEED LIMITED

Refer to Indicator/Warning Message

Description and Operation

WASHER FLUID LOW ADD FLUID

Refer to Wiper/Washer System

Description and Operation

WATER IN FUEL SERVICE REQUESTED

Refer to Indicator/Warning Message

Description and Operation

2008 Chevrolet Silverado 1500

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

Silverado

FUEL LEVEL LOW

The instrument panel cluster (IPC) illuminates the FUEL LEVEL LOW message in the driver
information center (DIC) and the LOW FUEL indicator when the IPC detects that the fuel level
is less than a pre-determined value. The IPC receives a class 2 message from the engine control
module (ECM) indicating fuel level percent.

KM/H

The instrument panel cluster (IPC) displays the km/h indicator when the cluster detects that
Metric units have been requested.

MPH

The instrument panel cluster (IPC) displays the MPH indicator when the cluster detects that
English units have been requested.

OIL PRESSURE LOW

The instrument panel cluster (IPC) illuminates the OIL PRESSURE LOW message in the driver
information center (DIC) when the engine control module (ECM) detects a low oil pressure
condition with the signal circuit low. The IPC receives a class 2 message from the ECM
requesting illumination.

PROGRAM CLUSTER

The instrument panel cluster (IPC) illuminates the PROGRAM CLUSTER message in the driver
information center (DIC) when the IPC needs to be programmed. Refer to Instrument Cluster
Programming and Setup for setup and programming.

VEHICLE OVERSPEED

The instrument panel cluster (IPC) illuminates the VEHICLE OVERSPEED indicator when the
IPC detects that the vehicle speed is more than 120 km/h (75 mph).

VEHICLE SPEED LIMITED

The instrument panel cluster (IPC) illuminates the VEHICLE SPEED LIMITED message in the
driver information center (DIC).

TIGHTEN GAS CAP

The instrument panel cluster (IPC) illuminates the TIGHTEN GAS CAP message in the driver
information center (DIC) when the engine control module (ECM) detects a low fuel pressure

2008 Chevrolet Silverado 1500

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

Silverado

condition. The IPC receives a class 2 message from the ECM requesting illumination.

UPSHIFT INDICATOR

The instrument panel cluster (IPC) illuminates the upshift indicator when the powertrain control
module (PCM) determines that the vehicle should be shifted to the next higher gear. The IPC
receives a class 2 message from the PCM requesting illumination.

WATER IN FUEL SERVICE REQUIRED

The instrument panel cluster (IPC) illuminates the WATER IN FUEL message in the driver
information center (DIC) when the engine control module (ECM) detects a low signal from the
water in fuel sensor. The IPC receives a serial data message from the ECM requesting
illumination.

INSTRUMENT CLUSTER DESCRIPTION AND OPERATION

Displays Test

Certain instrument panel cluster (IPC) features are tested when the ignition is turned on in order
to verify the features are working properly. The following occurs at key up:

The air bag indicator flashes 7 times (not IPC controlled).

The ABS indicator illuminates briefly.

The battery indicator illuminates briefly.

The brake indicator illuminates briefly.

The coolant temperature indicator illuminates briefly.

The cruise engage indicator illuminates briefly.

The engine oil pressure indicator illuminates briefly.

The malfunction indicator lamp (MIL) illuminates briefly (not IPC controlled).

The seat belt indicator illuminates for 70 seconds or until the driver seat belt is latched (not
IPC controlled).

The security indicator illuminates briefly.

The tire pressure low indicator illuminates briefly.

The vehicle dynamics caution (VDC) indicator illuminates briefly.

All segments of the driver information center (DIC) illuminate briefly.

All odometer segments illuminate briefly.

The PRNDL segment illuminates briefly.

2008 Chevrolet Silverado 1500

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

Silverado