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Chevrolet Silverado / GMC Sierra. Manual - part 2908
Fig. 5: Internal Components
Courtesy of GENERAL MOTORS CORP.
Callout
Component Name
1
Transfer Case High/Low Planetary Carrier Retaining Ring
2
Transfer Case High/Low Locking Plate
3
Transfer Case Planetary Carrier Sun Gear Thrust Washer
4
Transfer Case Input Shaft
5
Transfer Case Input Shaft Pilot Bearing Assembly
6
Transfer Case Input Shaft Pilot Bearing Retaining Ring - HD Only
7
Transfer Case Planetary Carrier Sun Gear Thrust Washer
8
Transfer Case High/Low Planetary Carrier Assembly
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Transfer Case - MP 3023/3024-NQH - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &
Silverado
9
Transfer Case High/Low Clutch
10
Transfer Case High/Low Shift Fork Pad
11
Transfer Case High/Low Shift Fork
12
Transfer Case High/Low Shift Fork Spring Assembly
13
Transfer Case Two/Four Wheel Drive Actuator Cam Retaining Ring
14
Transfer Case Two/Four Wheel Drive Actuator Cam Spacer
15
Transfer Case Two/Four Wheel Drive Actuator Cam
16
Transfer Case Control Actuator Shaft
17
Transfer Case High/Low Shift Fork Pin
18
Transfer Case Actuator Shaft Gear
19
Transfer Case Rear Output Shaft Assembly
20
Transfer Case Front Output Shaft Drive Chain Assembly
21
Transfer Case Front Output Shaft Drive Sprocket
22
Transfer Case Front Output Shaft Drive Sprocket Bearing Assembly
23
Transfer Case Front Output Shaft Drive Sprocket Spacer - Rear
24
Transfer Case Front Output Shaft Drive Sprocket Retaining Ring
25
Transfer Case Oil Pump Assembly
26
Transfer Case Rear Output Shaft Speed Reluctor Wheel
27
Transfer Case Rear Output Shaft Rear Bearing Retaining Ring
28
Transfer Case Rear Output Shaft Rear Bearing Assembly
29
Transfer Case Rear Output Shaft Rear Bearing Retaining Ring
30
Transfer Case Oil Pump Suction Pipe Seal
31
Transfer Case Oil Pump Suction Pipe
32
Transfer Case Front Output Shaft Rear Bearing Assembly
33
Transfer Case Front Output Shaft Driven Sprocket Spacer
34
Transfer Case Front Output Shaft Driven Sprocket
35
Transfer Case Front Output Shaft Hole Plug
36
Transfer Case Front Output Shaft
37
Transfer Case Front Output Shaft Front Bearing Assembly
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Transfer Case - MP 3023/3024-NQH - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &
Silverado
Fig. 6: Clutch Components
Courtesy of GENERAL MOTORS CORP.
DIAGNOSTIC INFORMATION AND PROCEDURES
DIAGNOSTIC CODE INDEX
DIAGNOSTIC CODE INDEX
Callout
Component Name
1
Transfer Case Rear Output Shaft
2
Transfer Case Control Actuator Lever Thrust Bearing Assembly
3
Transfer Case Control Lever
4
Transfer Case Control Actuator Lever Bearing Assembly
5
Transfer Case Control Actuator Lever Ball (Qty: 3)
6
Transfer Case Control Actuator Lever Assembly
7
Transfer Case Control Actuator Lever Thrust Bearing Assembly
8
Transfer Case Control Actuator Lever Washer
9
Transfer Case Four Wheel Drive Clutch Pressure - Apply - Plate
10
Transfer Case Four Wheel Drive Clutch Pressure Plate Spring (Qty: 4)
11
Transfer Case Four Wheel Drive Clutch Pressure - Steel - Plate (Qty: 7)
12
Transfer Case Four Wheel Drive Clutch Pressure - Friction - Plate (Qty:
8)
13
Transfer Case Four Wheel Drive Clutch Hub
14
Transfer Case Four Wheel Drive Clutch Shim
15
Transfer Case Two/Four Wheel Drive Clutch Retaining Ring
16
Transfer Case Front Output Shaft Drive Sprocket Spacer - Front
17
Transfer Case Four Wheel Drive Clutch Housing Retaining Ring
18
Transfer Case Four Wheel Drive Clutch Housing
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Transfer Case - MP 3023/3024-NQH - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &
Silverado
DTC
Description
DTC B0770
B0770 01: AWD Indicator Circuit Short to Battery
B0770 06: AWD Indicator Circuit Short to Ground or Open
DTC B0775
B0775 01: 4 High Indicator Circuit Short to Battery
B0775 06: 4 High Indicator Circuit Short to Ground or Open
DTC B0780
B0780 01: 4 Low Indicator Circuit Short to Battery
B0780 06: 4 Low Indicator Circuit Short to Ground or Open
DTC B0785
B0785 01: 2 High Indicator Circuit Short to Battery
B0785 06: 2 High Indicator Circuit Short to Ground or Open
DTC B0790
B0790 01: Neutral Indicator Circuit Short to Battery
B0790 06: Neutral Indicator Circuit Short to Ground or Open
DTC B2725
B2725 08: Active Transfer Case Mode Switch Circuit
DTC C0306
C0306 02: Motor A or B Circuit Short to Ground
C0306 05: Motor A or B Circuit Short to Battery or Open
DTC C0321
C0321 01: Transfer Case Lock Circuit Short to Battery
C0321 02: Transfer Case Lock Circuit Short to Ground
C0321 04: Transfer Case Lock Circuit Open
C0321 08: Transfer Case Lock Circuit Signal Invalid
DTC C0374
C0374 54: General System Performance Temperature High
DTC C0379
C0379 01: Front Axle System Short to Battery
C0379 02: Front Axle System Short to Ground
C0379 04: Front Axle System Open Circuit
C0379 08: Front Axle System Signal Invalid
DTC C0387
C0387 59: Unable to Complete Shift Circuit/Component
Protection Timeout
DTC C0392
C0392 01: Rotational Position Sensor Circuit Short to Battery
C0392 02: Rotational Position Sensor Circuit Short to Ground
C0392 08: Rotational Position Sensor Circuit Signal Invalid
DTC C0396
C0396 01: Incremental Position Sensor Circuit Short to Battery
C0396 02: Incremental Position Sensor Circuit Short to
Ground
C0396 04: Incremental Position Sensor Open Circuit
C0396 05: Incremental Position Sensor Circuit Short to Battery
or Open
DTC C0397
C0397 64: Transfer Case Clutch Performance Actuator
Slipping
DTC C0398
C0398 5A: Incremental Sensor - Rotational Position Sensor
Correlation Plausibility Failure
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Transfer Case - MP 3023/3024-NQH - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &
Silverado
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