Types of Road Test. Chevrolet S10

For 1990-2009 cars only

Makes 🢒 Chevrolet 🢒 1999 🢒 S10 - Electric 🢒 General Information 🢒 Vibration Diagnosis and Correction 🢒 Types of Road Test

Caution: Road test a vehicle under safe conditions and while obeying all traffic laws. Do not attempt any maneuvers that could jeopardize vehicle control. Failure to adhere to these precautions could lead to serious personal injury and vehicle damage.

Important: Before you perform any road test, inspect the tires and wheels. Refer to Tire and Wheel Inspection.

The following road test procedures are the most often used and are also the most informative:

•	Tire and wheel inspection

•	Slow acceleration test

•	Steering input test

These tests will help to pinpoint the vibration. Perform all of the tests on a smooth, level road.

Slow Acceleration Test

This test will identify those conditions which are related to the engine-speed or to the vehicle-speed. Additional tests may be necessary in order to determine the exact cause of the vibration.

On a smooth, level road, slowly accelerate up to highway speed.
Look for disturbances that match the customer's description.
Observe the following readings where the disturbance occurs:

•	The vehicle speed, km/h (mph)

•	The frequency (if possible)

Steering Input Test

This test is intended to determine how much the wheel bearings and other suspension components contribute to the vibration, especially a vibration relating to noise, such as growl, grinding, and roaring.

With the vehicle at the vibration speed (mph), drive through slow sweeping turns, first in one direction and then in the other direction.
If the vibration gets worse or if the vibration goes away, inspect the following components as possible causes of the vibration:

•	The wheel bearings

•

The hubs

•	The tire tread