GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2008 🢒 G8 🢒 General Information 🢒 Vibration Diagnosis and Correction 🢒 Suspension Strut and Shock Absorber Testing - On Vehicle

Step

Action

Yes

No

1

Did you review the General Description and perform the necessary inspections?

Go to Step 2

Go to Symptoms - Suspension General Diagnosis .

2

Verify that the customer's concern is present.

Does the vehicle operate normally?

System OK

Go to Step 3

3
  1. Use your hands in order to lift up and push down each corner of the vehicle 3 times.
  2. Remove your hands from the vehicle.
  3. Locate a shock or strut that exceeds 2 undulations.

Did you locate a shock or strut that exceeds 2 undulations?

Go to Step 5

Go to Step 4

4

Important: A strut does not require replacement if any or a combination of the following are present:

   • A build up of oil up to 11 mm wide at the end of the piston rod.
   • Oily sludge accumulated from normal operating conditions to 4 cm from the top of the strut body.
   • Road grease, oil, sand and dust discoloration on the body.

Inspect each strut for external fluid leakage.

Is a strut leaking?

Go to Step 5

Go to Strategy Based Diagnosis .

5

Replace the strut unit or shock absorber. Refer to the appropriate procedure:

    •  Shock Absorber Replacement for Front.
    •  Shock Absorber Replacement for Rear.

Did you complete the repair?

Go to Step 6

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6

Operate the vehicle in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3