GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2009 🢒 TopKick C-Series (Conventional) C6/C7/C8 🢒 Preface 🢒 Dangers, Warnings, and Cautions 🢒 Transmission Support Replacement

Removal Procedure

    Object Number: 816302 Size: SH
  1. Raise and suitably support the vehicle with safety stands. Refer to Lifting and Jacking the Vehicle.
  2. Support the transmission with safety stands.
  3. Remove the transmission mount to rear frame mount nuts.

    4. Object Number: 816259 Size: SH
  4. Remove the transmission support mount to transmission nuts.
  5. Remove the transmission mount.

    6. Object Number: 816303 Size: SH
  6. Remove the transmission support frame mount to frame nuts.
  7. Remove the transmission support frame mounts.

Installation Procedure

    Object Number: 816303 Size: SH
  1. Install the transmission frame support mounts.

    2. Caution: Refer to Fastener Caution in the Preface section.

  2. Install the transmission frame support mounts nuts.

    3. Tighten
    Tighten the transmission frame mounts to frame nuts to 70 N·m (52 lb ft).


    Object Number: 816259 Size: SH
  3. Install the transmission support.
  4. Install the transmission support to transmission nuts.

    5. Tighten
    Tighten the transmission support to transmission nuts to 70 N·m (52 lb ft).


    Object Number: 816302 Size: SH
  5. Install the transmission support to rear frame mount nuts

    6. Tighten
    Tighten the transmission support mount to rear frame mount nuts to 70 N·m (52 lb ft).

  6. Remove the safety stands from the transmission.
  7. Lower the vehicle.