GM Service Manual Online
For 1990-2009 cars only

Object Number: 1631796  Size: SH

A cable and lever arrangement between the selector mechanism in the gear box and the gear lever transfers torsional force and transverse force from the gear lever to the selector shaft.

The shifting pattern is indicated by the diagram on the gear lever knob.


Object Number: 1631799  Size: SH

The external components of the shift control housing system are as follows:

    • Cable assembly (1)
    • Gear lever housing (2)
    • Gear lever (3)

Object Number: 1631803  Size: SH

The internal components of the shift control housing system are as follows:

    • Selector shaft (1)
    • Gear selector arm, push and pull (2)
    • Gear selector arm, turn (3)
    • Reversing light switch (4)
    • 5th/6th gear fork (5)
    • 1st/2nd gear fork (6)
    • 3rd/4th gear fork (7)
    • Reverse gear fork (8)

Both cables are attached to the levers by ball joints and run through the bulkhead via a rubber grommet to the gear lever housing. This system prevents any movement and vibrations from the drive unit being propagated to the gear lever and body.


Object Number: 1631805  Size: SH

The components related to the selector mechanism are as follows:

    • Selector mechanism (1)
    • Reverse gear fork (2)
    • 3rd/4th gear fork (3)
    • 1st/2nd gear fork (4)
    • 5th/6th gear fork (5)

To engage reverse (R), the catch under the gear knob must be lifted. Due to the spring load in the gear select mechanism, when in neutral the gear lever strives to assume a balanced position in line with 3rd and 4th gears. This allows the driver to become familiar with the shift pattern and avoid incorrect gear changes.