GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

DEFINITION: Any noise emitted from the rear of the vehicle that is induced by VEHICLE SPEED or DRIVING TERRAIN as related to the rear suspension.

1

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

Go to Step 2

Go to  Symptoms - Suspension General Diagnosis .

2

Attempt to duplicate the condition. Road test the vehicle.

Did you duplicate the condition?

Go to Step 3

System OK

3

Is the noise reactive to vehicle load or speed?

Go to Step 4

Go to Step 7

4

  1. Inspect the tyres and wheels for the following condition:
  2. • Correct tyre inflation. Refer to Tire Inflation Pressure Specifications .
    • Abnormal tyre wear or damage. Refer to Tire Diagnosis - Irregular or Premature Wear .
    •  Inspect the wheel nuts for looseness. Refer to Fastener Tightening Specifications .
  3. Repair as necessary.

Did you find and correct the condition?

Go to Step 11

Go to Step 5

5

Inspect the differential for noise. Refer to Diagnostic Starting Point - Rear Drive Axle .

Did you find and correct the condition?

Go to Step 11

Go to Step 6

6

Bounce the rear of the vehicle in order to duplicate the noise.

Did you duplicate the noise?

Go to Step 8

Go to Step 9

7

  1. Inspect the rear suspension components for looseness. Refer to Fastener Tightening Specifications .
  2. Tighten as necessary. Refer to Fastener Tightening Specifications .

Did you find and correct the condition?

Go to Step 11

Go to Step 9

8

Inspect the rear struts. Refer to Suspension Strut and Shock Absorber Testing - On Vehicle .

Did you find and correct the condition?

Go to Step 11

Go to Step 10

9

  1. Inspect the rear stabiliser bar, links, and insulators for wear or damage.
  2. Replace as necessary.

Did you find and correct the condition?

Go to Step 11

Go to Step 10

10

  1. Inspect the rear suspension control arms, caster arms for wear or damage.
  2. Repair as necessary.
  3. • Refer to Adjust Link Replacement .
    • Refer to Trailing Arm Replacement .

Did you find and correct the condition?

Go to Step 11

Go to Strategy Based Diagnosis in General Information.

11

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3