GM Service Manual Online
For 1990-2009 cars
Makes 🢒 Chevrolet 🢒 2004 🢒 C-Series Medium Duty Truck C6/7/8 - Mexico 🢒 Body 🢒 Frame and Underbody 🢒 Body Rear Mount Replacement

Removal Procedure

    Object Number: 206441 Size: SH

    Important: Install lift straps, or place a jack at each end of the rear cab sill. If jacks are used, be sure to 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. Remove the support bracket to the mounting bracket bolts, washers, and nuts.
  3. Raise the back of the cab slightly.
  4. Remove the mounts.

    5. Object Number: 206446 Size: SH
  5. Remove the 4 support brackets to the frame cross member nuts, washers, and bolts.
  6. Remove the support bracket from the cross member.

    7. Object Number: 206449 Size: SH
  7. Remove the 2 center screws and washers. Remove the 4 ourboard screws and washers from the mounting bracket and the bottom of the cab.
  8. Remove the mounting bracket from the bottom of the cab.

Installation Procedure

    Object Number: 206441 Size: SH

    Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

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

  1. Install the mounting bracket to the bottom of the cab.

    2. Tighten
    Tighten the cab mount nuts to 40 N·m (30 lb ft).

  2. Install the 4 ourboard screws and washers to the mounting bracket and the bottom of the cab. Install the 2 center screws and washers.

    3. Object Number: 206446 Size: SH
  3. Install the support bracket to the cross member.
  4. Install the 4 support brackets to the frame cross member nuts, washers, and bolts.

    5. Object Number: 206456 Size: SH
  5. Install the mounts.
  6. Lower the back of the cab.
  7. Install the support bracket to the mounting bracket bolts, washers, and nuts.

    8. Tighten
    Tighten the bracket to cab mount bolts to 40 N·m (30 lb ft).

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