Buick Regal: Repair Instructions - Off Vehicle
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Power Transfer Unit Case Holding Fixture Installation
Power Transfer Unit Case
Procedure
Always secure with the pivot pin after rotating.
NOTE:
The power transfer unit can be rotated 360 degr
Power Transfer Unit Case Housing Cleaning and Inspection
Preliminary Procedure
Clean the power transfer unit case housing.
The case halves, internal gears and bearings are not serviceable
compon
Power Transfer Unit Idler Gear Shaft Tube and O-ring, Input Shaft Bearing
Race and Shim, and Idler Gear Shaft Bearing
Race and Shim Installation
Power Transfer Unit Idler Gear Shaft Access Tube O-
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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
DT
This OnStar system consists of the following components:
Telematics communication interface control module
OnStar three button assembly
Microphones
Cellular antenna
Navigation antenna
Back up battery
WiFi Support
TTY (Teletypewriter)
This system also interfaces with the factory install