Recall: Brake/Fuel Tube Corrosion - Technical Service Bulletin
4.
If no red corrosion is present on any of the four tubes, reinstall the two outboard bolts into the frame rail and crossmember holes and torque to 250
in-lbs (28 N.m) (Figure 3)
Note:
The two outboard bolts must be installed to assure the structural integrity of the frame rail.
5.
Snap the provided clip onto the four tubes so that the nipple on bottom of clip is in the outboard position. The clip should be positioned at the
forward edge of the center crossmember as shown in figure 3.
6.
Using the screw hole in the clip as a template, center punch, then drill a 3/16 inch (4.8 mm) hole in the crossmember for the clip retaining screw
(Figure 3).
7.
Secure clip to the crossmember and torque the provided retaining screw to 30 in-lbs (3 N.m) (Figure 3).
8.
Lower vehicle from hoist.
B. Replace Corroded Tube(s) and Install Retaining Clip
Note:
Only those tubes with RED CORROSION, as determined by the inspection in section "A" require replacement. Tubes with white powder or
other residue/discoloration do not require replacement. The brake tubes are the most susceptible to corrosion. Very few fuel vapor tubes and
even fewer fuel supply tubes are expected to require replacement. Therefore, the following procedure replaces brake tubes, then if necessary,
the fuel vapor and supply tubes.
1.
Lower vehicle from the hoist.
2.
Remove air inlet tube, air cleaner housing and coolant over flow bottle.
3.
Remove brake lamp fuse from the Power Distribution Center (PDC).
4.
Install a brake pedal fixture tool to keep the master cylinder in the applied position, such as an alignment tool or prop rod from the brake pedal to
the drivers seat.
Note:
Keeping the master cylinder in the "applied" position makes bleeding the brakes faster and easier since only the REAR brakes will require
bleeding.
5.
Disconnect the left rear and right rear brake tubes from the:
^
proportioning valves on the inboard side of master cylinder on NON-ABS equipped vehicles or;
^
proportioning valves on the Hydraulic Control Unit (HCU) on ABS equipped vehicles.
Caution:
Be sure to disconnect only the REAR brake tubes or the entire brake system must be bled.
6.
Remove tubes from dash panel rubber and plastic retainers and if equipped, cut tie straps retaining ABS wiring.
Note:
To assure that wiring and tubes are properly positioned during reassembly, note tie strap locations and each tubes position in each retainer.
7.
If fuel supply tube requires replacement, release fuel system pressure, then disconnect fuel tube from engine compartment fuel hose quick-connect.
8.
Raise vehicle on hoist.
9.
Remove the splash shield located at fuel tank sending unit and fuel filter.
