GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

DEFINITION: A loud bang or thump that can usually be felt and/or heard when the vehicle is driven over bumps. This condition is commonly noticed when the vehicle trim height is too low.

1

Did you review the system descriptions and perform the necessary inspections?

Go to Step 2

Go to Symptoms - Suspension General Diagnosis

2

Verify that the suspension bottoms.

Does the suspension bottom?

Go to Step 3

System OK

3

Inspect the vehicle for overloading. Correct the overloading condition as necessary. Refer to the Certification Label on the left door lock pillar.

Did you find and correct the condition?

Go to Step 6

Go to Step 4

4

Inspect the suspension components for damage or wear. Repair or replace components as necessary. Refer to Suspension Strut and Shock Absorber Testing - On Vehicle .

Did you find and correct the condition?

Go to Step 6

Go to Step 5

5

Inspect the vehicle trim height. Repair or replace components as necessary. Refer to Trim Height Inspection .

Did you complete the trim height inspection procedure?

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 2