Vibration Analysis - Engine

WARNING: This page is about a different car, the 2003 Oldsmobile Bravada, 2003 GMC Envoy XL, 2003 GMC Envoy, and 2003 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.

Test Description

The numbers below refer to the step numbers on the diagnostic table.

2. If powertrain related DTCs are present, there may be a powertrain performance condition present which could be a contributing cause to the customer's concern.
3. This step is designed to identify engine-speed related disturbances that are NOT torque or load sensitive.
4. This step is designed to identify engine-speed related disturbances that ARE torque or load sensitive.
6. Making comparisons of the customer's vehicle with an equally equipped, same model year and type, KNOWN GOOD vehicle will help determine if certain disturbances may be characteristic of a vehicle design.

Fig 1: Vibration Analysis - Engine (1 Of 2)

Courtesy of GENERAL MOTORS CORP.

Fig 2: Vibration Analysis - Engine (2 Of 2)

Courtesy of GENERAL MOTORS CORP.