GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2005 🢒 Montana SV6 🢒 Body 🢒 Frame and Underbody 🢒 Drivetrain and Front Suspension Frame Rear Insulator Replacement

Removal Procedure

    Important: In order to remove any frame insulator, loosen the adjacent frame insulators to permit the frame to separate from the body. Do not break the fan shroud or damage the frame attachments, such as steering hoses and brake pipes during the replacement of body mounts.

    When installing a body mount, ensure the lower insulator is seated into the frame. The lower insulator should not be loose. The spacer and the corresponding upper insulator is pressed into the lower insulator thus squeezing the frame. The bolt is then inserted through the mount, capturing the lower retainer. The body mount components prevent contact of the frame to the body.

    Do not over tighten the body mount. Over tightening may collapse a spacer or strip a bolt. When the frame insulator bolts are removed, always discard the bolts and replace with new bolts.

    When clamping by the mount, ensure the surfaces are clean and dry. If the frame insulator bolt does not screw in smoothly, run a tap through the frame crossmember nut in the body in order to remove foreign material. Ensure the tap does not punch through the underbody.

    Whenever the body is moved in relation to the frame, disconnect the intermediate shaft from the rack and pinion steering gear and stub shaft.

  1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle .
  2. Remove the intermediate shaft from the steering gear stub shaft. Refer to Intermediate Steering Shaft Replacement .
  3. Install a utility stand to the rear of the frame.

    4. Object Number: 1548651 Size: SH
  4. Remove the frame bolts (4).
  5. Remove the frame strap bolts (3) and straps (5).

    6. Object Number: 1502988 Size: SH
  6. Lower the rear of the frame.
  7. Remove the upper (1) and lower insulators (2) from the rear of the frame as a set.

Installation Procedure

    Object Number: 1502988 Size: SH
  1. Apply a thin coat of rubber lubricant GM P/N 1051717 (Canadian P/N 5728223), to the inside surface of the lower insulator and to the top surface of the upper insulator.
  2. Install the upper (1) and lower insulators (2) to the rear of the frame as a set.
  3. Raise the rear of the frame.

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


    Object Number: 1548651 Size: SH
  4. Install the frame straps (5) and bolts (3).

    5. Tighten
    Tighten the bolts to 50 N·m (37 lb ft).

  5. Install the rear frame bolts (4).

    6. Tighten
    Tighten the bolts to 240 N·m (177 lb ft).

  6. Raise the vehicle and secure.
  7. Remove the utility stand.
  8. Install the intermediate shaft to the steering gear stub shaft. Refer to Intermediate Steering Shaft Replacement .
  9. Lower the vehicle.