GM Service Manual Online
For 1990-2009 cars only

Important: The shift rails and the shift forks are not serviceable. The shift cover can be disassembled for inspect. The shift fork interlock pins (roll pins) and the shift bar housing expansion plugs are serviceable.

    • Remove the old sealant from the shift cover.
    • Clean all the parts in a suitable cleaning solvent. Air dry the parts.
    • Inspect the shift shafts for wear or scoring.
    • Inspect the shift shaft forks for wear through the harden surface, scoring, or distortion. The shift fork pads on the 3rd/4th shift fork are serviceable.
    • Inspect the shift fork and bar poppet plungers and springs for wear or distortion.
    • Inspect the shift shaft socket assembly components for wear or distortion.
    • Replace the shift cover if there is excessive wear to the shift forks, shift shafts, or to the shift shaft sockets.