Transfer Case Identification

WARNING: This page is about a different car, the 2004 GMC Safari and 2004 Chevrolet Astro. However, it is still accessible from the selected car via links, so may be relevant.

An identification tag is attached to the rear half of the transfer case. The tag provides the following information:

Model number (1)
1. First Digit-1 =Single Speed, 2=Two-Speed
2. Second Digit-2 = T-Utility, 3 =T-Truck, L-Van, 4 or 6 = K-Truck and Utility
3. Third Digit-1 = Manual, 3 = Electric Shift, 6 = Automatic, 9 = All Wheel Drive
Assembly number (2)
Serial number (Date and Shift Code) (3)
Low range reduction ratio (4)

Fig 1: Transfer Case Identification Tag
Courtesy of GENERAL MOTORS CORP.

The information on this tag is necessary for servicing the transfer case. If the tag is removed or becomes dislodged during service operations, keep the identification tag with the unit.