ANTI-LOCK BRAKE PEDAL SQUEAK REPAIR DESCRIBED

1988 DELTA 88 AND NINETY-EIGHT WITH JM4 OPTION (ANTI-LOCK BRAKES)

CONDITION:

---------- High pitched squeak which may occur when the brake pedal is lightly depressed, primarily at the beginning of the pedal stroke.

CAUSE:

------ The condition may be caused by contact between the spring cage of the push rod bracket and the spring retainer (Figure 1).

CORRECTION:

----------- 1. Remove the sound absorber.

2. Inspect for a contact condition between the spring retainer and the spring cage by pulling the rubber boot to the side (Figure 2). (if contact is not present, this bulletin is not applicable.)

3. Locate the point where the left side support leg of the cage connects to the pushrod pan through surface. Apply a small force between this point and the steering column support bracket to move the cage assembly to the right, toward center of vehicle (Figure 3, Point A). Do not apply force on the cage leg (Figure 3, Point B). Move the cage so that approximately 2 mm of clearance is available between the cage and retainer. Use a flat blade tool at least one half inch wide to move the cage.

4. Verify visually that the interference condition is no longer present by again pulling the boot to the side. Verify that no bending of the support leg of the bracket occurred. Verify that the squeak condition is no longer present.

5. Verify that brake pedal travel is not restricted or impaired. Pull back on the brake pedal to adjust the stop lamp switch. Then depress the pedal to apply the brakes and observe the brake pedal to verify that pedal travel is not restricted. Again verify proper stop lamp switch and cruise switch adjustment.

6. Reinstall the sound absorber.

WARRANTY INFORMATION

Labor Operation Number: T5171 Labor Time: .8 hrs. Trouble Code: 92

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.