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Engine Mount: All Technical Service Bulletins
Interior - Vehicle Vibration Between 35-55 MPH

85-113
6
AUG., 1985
Subject:

VEHICLE VIBRATION

Model and Year:

1983-85 C10-20 WITH 5.OL AND 5.7L ENGINES

TO:

ALL CHEVROLET DEALERS

Some 1983-85 C10-20 series trucks may experience a vehicle vibration (a light shake or "buzzing" in the seat or dash area) condition between 35-55
mph. This condition is usually more pronounced if the vehicle is not loaded.

Refer to Sections 3E and 4A of the Light Duty Service manual for procedures on checking wheels, tires and propshafts. If these procedures do not
correct the condition, the following parts may be installed:

Figure No. 1

1983 Models

Replace the cab body mounts with mounts for the 1984-85 trucks.

Part Number

Description

Quantity Required

15597600

Upper Cushion

4

15597629

Lower Cushion

4

14027472

Retainer

4

See Figure No.

1

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