Steering - Wheel Vibration From P/S Pump
85-1193B
SEPT., 1985
Subject: POWER STEERING PUMP VIBRATION
Model and Year: 1984-85 C/K 20 AND 30 SERIES TRUCKS WITH 5.7L LT9 ENGINES AND AIR CONDITIONING
TO: ALL CHEVROLET DEALERS
Some 1984-85 C/K 20 and 30 Series trucks equipped with the 5.7L LT9 engine and air conditioning may experience a power steering pump vibration with the air conditioning on. This vibration may be felt in the steering wheel and the dash panel area.
If this condition is encountered, the power steering pump should be inspected to see if the rear support bracket is missing (See Figure No. 1).
If the rear support bracket, P/N 14082318, is missing, it should be installed to correct the vibration condition.
Refer to Section 3B7 of the Light Duty Service Manual for the proper removal and installation instructions of the power steering pump.