Chevrolet Silverado / GMC Sierra. Manual — part 2910

This parameter displays the position of the incremental sensor in incremental sensor return
voltage.

Mode Switch Return Voltage

This parameter displays the transfer case shift control switch return voltage from 0-7.5 volts.

Mode Switch Selected

This parameter displays the transfer case shift control switch mode currently selected by the
driver.

Mode Switch Selected

This parameter displays the voltage being supplied to the transfer case shift control switch
by the transfer case control module from 0-7.5 volts.

Motor Brake

This parameter displays the voltage being supplied to the transfer case motor brake via the
transfer case control module from 0 to battery voltage.

Neutral Indicator Light

This parameter displays On when the transfer case shift control module commands the
neutral indicator light On. The scan tool displays On or Off.

Rotational Position Sensor

This parameter displays the position of the rotational position sensor in degrees.

Rotational Position Sensor

This parameter displays the position of the rotational position sensor by displaying the
rotational position sensor return voltage as read by the transfer case control module.

Run/Crank

This parameter displays the status of the run/crank signal to the transfer case control module
as active or inactive.

Transfer Case Lock

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Transfer Case - MP 3023/3024-NQH - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado

This parameter displays the status of the transfer case lock as engaged or disengaged, the
lock will be engaged in auto 4WD, 4WD, or 4WD low and disengaged in 2WD and neutral.

Transfer Case Motor

This parameter displays the current draw in amperage that the motor is currently drawing
from the transfer case control module.

Transfer Case Position

This parameter displays the current mode the transfer case is in as indicated by the transfer
case control module.

Trans. Fluid Temp.

This parameter displays the transmission fluid temperature in degrees Celsius.

TR Switch Status

This parameter displays the current gear the transmission is in.

Vehicle Speed

This parameter displays vehicle speed in kilometers per hour.

Software Part Number

This parameter displays the numbers or characters assigned to the current version of
software used in the transfer case shift control module. The scan tool displays an
alphanumeric value.

Total Slippage

This parameter displays the total slippage of both the front and rear propshafts. The scan
tool displays a range of 0-8,192 RPM.

DIAGNOSTIC TROUBLE CODE (DTC) LIST

DTC

Modules

DTC B0770

Electronic Transfer Case

DTC B0775

Electronic Transfer Case

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Transfer Case - MP 3023/3024-NQH - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado

DTC B0770

Diagnostic Instructions

Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

Review Strategy Based Diagnosis for an overview of the diagnostic approach

Diagnostic Procedure Instructions provides an overview of each diagnostic category

DTC Descriptor

DTC B0770 01

AWD Indicator Circuit Short to Battery

DTC B0770 06

AWD Indicator Circuit Short to Ground or Open

Diagnostic Fault Information

DTC B0780

Electronic Transfer Case

DTC B0785

Electronic Transfer Case

DTC B0790

Electronic Transfer Case

DTC B2725

Electronic Transfer Case

DTC C0306

Electronic Transfer Case

DTC C0321

Electronic Transfer Case

DTC C0379

Electronic Transfer Case

DTC C0387

Electronic Transfer Case

DTC C0392

Electronic Transfer Case

DTC C0396

Electronic Transfer Case

DTC C0397

Electronic Transfer Case

DTC C0398

Electronic Transfer Case

DTC C0550

Electronic Transfer Case

DTC C0569

Electronic Transfer Case

DTC C0896

Electronic Transfer Case

Circuit

Short to

Ground

Open/High

Resistance

Short to

Voltage

Signal

Performance

DTC B0770 DTC B0770 DTC B0770

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Transfer Case - MP 3023/3024-NQH - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado