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POWER TRANSFER UNIT CASE IDENTIFICATION
The power transfer unit primary identification label (1) is located on the
rear extension housing. The power transfer
unit secondary identification stamping (2) is located on the bottom of the main
housing.
Transfer Case Primary Identification Label
GM P
Sunroof
If equipped, the sunroof only
operates when the ignition is on or
in ACC/ACCESSORY, or when
Retained Accessory Power (RAP) is
active.
Sunroof Switch
The vehicle may have one of two
different switch configurations.
Open/Close (Manual Mode) :
Press (1) or
(1) to the first
detent to open t