Parts Information

Parts are to be obtained from Service Parts Operations (SPO) (formerly known as GMWDD). To ensure these parts will be obtained as soon as possible, they should be ordered from SPO on a C.I.O. with no special instruction code, but on an advise code (2).

Vehicles determined to have the mis-machined adapter described in the "Service Procedure" section of this bulletin require replacement of the following parts and addition of transmission lubricant as required.

PART QUANTITY
NUMBER DESCRIPTION PER VEHICLE

15597792 Transfer Case Adapter 1 (as required)

3901180 Gasket (Adapter to 1 (as required)
transmission)

15594357 Gasket (Adapter to transfer 1

case)

NPN SAE 80W or SAE 80W-90 4 quarts
Gear lubricant