GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2008 🢒 TopKick C-Series (Conventional) C4/C5 🢒 Body Repair 🢒 Frame and Underbody 🢒 Body Rear Mount Replacement

Removal Procedure

    Object Number: 818852 Size: SH

    Important: Install lift straps or place a jack at each end of the rear cab sill. If jacks are used, place blocks of wood between the jacks and the sill.

  1. Disengage the wiring harness connector retainer from the rear of the upper cab mount.
  2. Support the back of the cab.
  3. Remove the support bracket/cab mount assembly to the frame crossmember bolts.
  4. Raise the back of the cab slightly.

    5. Object Number: 818854 Size: SH
  5. Remove the support brackets/cab mount bolts.
  6. Remove the support brackets/cab mount assembly.

    7. Object Number: 818853 Size: SH
  7. Remove the mount to the cab support bracket bolts.
  8. Remove the mount from the cab support.

Installation Procedure

    Object Number: 818853 Size: SH

    Important: Ensure that the word TOP on the mount is oriented properly.

  1. Install the mount to the cab support bracket.

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

  2. Install the outboard bolts.

    3. Tighten
    Tighten the cab mount to cab support bracket bolts to 85 N·m (63 lb ft).


    Object Number: 818854 Size: SH
  3. Install the support bracket/cab mount to the cab.
  4. Install the support brackets/cab mount bolts.

    5. Tighten
    Tighten the support bracket/cab mount to the cab bolts to 185 N·m (251 lb ft).


    Object Number: 818852 Size: SH
  5. Lower the back of the cab.
  6. Install the support bracket/cab mount assembly to the frame crossmember bolts.

    7. Tighten
    Tighten the support bracket/cab mount assembly to the frame crossmember bolts to 260 N·m (192 lb ft).

  7. Engage the wiring harness connector retainer to the rear of the upper cab mount.