Chevrolet Silverado / GMC Sierra. Service manual — part 2931
REPAIR INSTRUCTIONS - ON VEHICLE
TRANSFER CASE SHIFT CONTROL SWITCH REPLACEMENT (WITHOUT SLT)
Transfer case to adapter
leak
1. Inspect for the following conditions:
Loose mounting fasteners
Gasket faulty
The transfer case input shaft seal leaking
The pilot bearing in the input shaft leaking
2. Repair or replace the following components if found
faulty:
Repair or replace the loose fasteners. Refer to
Transfer Case Adapter Replacement .
Replace the transfer case adapter gasket. Refer to
Transfer Case Adapter Replacement .
Replace the transfer case input shaft seal. Refer to
Input Shaft Seal Replacement .
Inspect for the following conditions:
Seal improperly installed, worn, or damaged
Seal bore damaged or cracked
Input shaft seal surface worn, grooved, or
damaged
Replace the pilot bearing in the input shaft if it is
leaking. Refer to Transfer Case Disassemble and
Transfer Case Assemble .
Case leaking
1. Inspect for the following conditions:
A cracked case
Case porosity
2. Replace the faulty case half. Refer to Transfer Case
Disassemble and Transfer Case Assemble.
Front case half to rear case
half seam leak
Disassemble and seal the case halves. Refer to Transfer Case
Disassemble and Transfer Case Assemble.
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Transfer Case - MP 3023/3024-NQH - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &
Silverado
Fig. 7: Transfer Case Shift Control Switch Replacement (Without SLT)
Courtesy of GENERAL MOTORS CORP.
TRANSFER CASE SHIFT CONTROL SWITCH REPLACEMENT (WITH SLT)
Callout
Component Name
1
Instrument Panel Accessory Trim Plate
Refer to Instrument Panel Accessory Trim Plate Replacement (without
RPO SLT) or Instrument Panel Accessory Trim Plate Replacement (with
RPO SLT) .
2
Transfer Case Shift Control Switch
Procedure:
Disconnect the electrical connector.
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Transfer Case - MP 3023/3024-NQH - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &
Silverado
Fig. 8: Transfer Case Shift Control Switch Replacement (With SLT)
Courtesy of GENERAL MOTORS CORP.
TRANSFER CASE SHIFT CONTROL MODULE REPLACEMENT
Callout
Component Name
Preliminary Procedure:
Remove the headlight bezel. Refer to Headlamp Switch Bezel Replacement (with RPO
SLT) .
1
Transfer Case Control Switch
Tip:
Disconnect the electrical connectors from the headlight and control
switches.
It may be necessary to use a small flat bladed screw driver to depress the
locking tabs to remove the control switch.
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Transfer Case - MP 3023/3024-NQH - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &
Silverado
Fig. 9: Transfer Case Shift Control Module Replacement
Courtesy of GENERAL MOTORS CORP.
TRANSFER CASE SHIELD REPLACEMENT
Callout
Component Name
1
Transfer Case Shift Control Module
Procedure
1. Disconnect the electrical connector.
2. Remove the module from the module bracket by releasing the retaining
tabs.
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Transfer Case - MP 3023/3024-NQH - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &
Silverado
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