Rattle Type Noise Coming from Center of Dash (Remove Cowl Insulator Clip and Insulate Mounting Stud)

Some customers may comment on a rattle type noise coming from the center of the dash. This noise can only be heard with the radio off and the engine running at idle.

An underhood fuel line contacting the cowl insulator clip (retainer) may be transmitting the noise into the cab. The location of the contact point is at the rear of the engine where the fuel lines route down under the vehicle.

Remove the cowl insulator clip (retainer) and insulate the mounting stud using the procedure listed below.

1. Remove the engine sight shield(s). If the vehicle is equipped with a three-piece shield, remove the center and left bank shields only.

Important: A door trim panel tool can be used to ease removal of the insulator clip (retainer).

2. Remove the cowl insulator clip (retainer) from the mounting stud. Removing the clip will gain the needed clearance from the fuel line. DO NOT reinstall the clip.
3. Obtain a section of 5 mm (3/16 in) vacuum hose and cut to a length of 16 mm (5/8 in).
4. Install the section of hose over the exposed stud and fully seat against the cowl. This will eliminate the possibility of a hard contact with the fuel line.
5. Install the engine sight shield(s).

For vehicles repaired under warranty, use: