GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

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

1

Road test the vehicle in order to verify the customer complaint. Ensure that the customer complaint is the suspension bottoming and not only a noise.

Does the suspension bottom when the vehicle is driven over bumps?

--

Go to Step 2

System OK

2

  1. Test for vehicle overloading. Refer to Tire Placard in Maintenance and Lubrication.
  2. If necessary remove the excess weight from the vehicle.
  3. Road test the vehicle in order to verify the customer complaint.

Does the suspension bottom when the vehicle is driven over bumps?

--

Go to Step 3

System OK

3

Inspect the vehicle trim height. Refer to Trim Height Inspection Procedure . Repair as necessary.

Is the inspection complete?

--

Go to Step 1

System OK