SERVICE MANUAL UPDATE HUB BEARING SEAL INSTALLATION

VEHICLES AFFECTED: 1985-89 C, 1989 H

Installation of the 1989 front suspension hub and bearing seal differs from prior years. As shown in Figure 1, the seal is installed on the outboard side of the steering knuckle.

Fill the cavity between the hub/bearing seal and the bearing with grease. Refer to the 1989 Service Information Manual (Section 3C, Front Suspension) for complete hub/bearing seal removal and installation procedure.

Steering knuckles for 1985-1988 Cadillac DeVilles and Fleetwoods (except 1986 models with ABS) are being serviced with 1989 steering knuckles. When installing these parts, it will be necessary to replace the hub and bearing seal and drive axle deflector ring. On 1987-1988 models with ABS the wheel speed sensor must also be replaced. On 1986 models with ABS the wheel speed sensor is not compatible with the new knuckle, and the new wheel speed sensor is not compatible with the 1986 ABS. Therefore, on this model it is necessary to replace the knuckle with the original style knuckle, seal, and deflector ring. Refer to the chart on the following page for proper part numbers and applications.

1985-1988 C/H Cars Steering Knuckle Service Parts

1985 1986 1987-1988 ---- ---- --------- Knuckle (without ABS) RH 25532664 25532664 25532664 LH 25532665 25532665 25532665 (with ABS) RH Does Not 25525862 25532664 LH Apply 25525863 25532665 Seal 14084119 14084119 14084119 Deflector Ring (without ABS) 7843114 7843114 7843114

(with ABS) Does Not 7843082 7843114 Apply Wheel Speed RH Does Not 25527890* 25532522 Sensor LH Apply 25527891* 25532521

* These parts are not required for knuckle replacement. Replace only if parts are damaged.

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.