GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Generic 🢒 2004 🢒 Unit Repair 🢒 Suspension 🢒 Suspension General Diagnosis 🢒 Noise Diagnosis - Rear Suspension

Noise Diagnosis - Rear Suspension w/Wheel Bearing Hub

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 6

4

Perform the following Inspections:

    • Inspect and adjust the tire Inflation. Refer to Tire Inflation Pressure Specifications in Maintenance and Lubrication.
    • Inspect for unusual tire wear. Refer to Vibration Analysis - Tire and Wheel in Vibration Diagnosis and Correction.
    • Inspect the wheel nuts for looseness. Refer to Fastener Tightening Specifications in Tire and Wheels.

Did you find and correct the condition?

Go to Step 10

Go to Step 5

5

Inspect the rear wheel bearings. Refer to Wheel Bearings Diagnosis .

Did you find and correct the condition?

Go to Step 10

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 7

Go to Step 9

7
  1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Inspect the rear suspension components for looseness. Refer to Fastener Tightening Specifications in Rear Suspension.
  3. Inspect the rear suspension components for damage and repair as necessary.

Did you find and correct the condition?

Go to Step 10

Go to Step 8

8

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

Did you find and correct the condition?

Go to Step 10

Go to Step 09

9
  1. Install the J 39570 Chassis Ear or equivalent.
  2. Bounce the rear of the vehicle, using the J 39570 or equivalent, in order to locate the source of the noise. If necessary, road test the vehicle.
  3. Repair or replace any defective component as necessary.

Did you find and correct the condition?

Go to Step 10

System OK

10

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3

Noise Diagnosis - Rear Suspension w/Straight Axle

Noise Diagnosis - Rear Suspension

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 6

4

Perform the following Inspections:

    • Inspect and adjust the tire Inflation. Refer to Tire Inflation Pressure Specifications in Maintenance and Lubrication.
    • Inspect for unusual tire wear. Refer to Vibration Analysis - Tire and Wheel in Vibration Diagnosis and Correction.
    • Inspect the wheel nuts for looseness. Refer to Fastener Tightening Specifications in Tire and Wheels.

Did you find and correct the condition?

Go to Step 10

Go to Step 5

5

Inspect the rear axle for rear axle noises. Refer to Symptoms - Rear Drive Axle .

Did you find and correct the condition?

Go to Step 10

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 7

Go to Step 9

7
  1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Inspect the rear suspension components for looseness and tighten as necessary. Refer to Fastener Tightening Specifications in Rear Suspension.
  3. Inspect the rear suspension components for damage and repair as necessary.

Did you find and correct the condition?

Go to Step 10

Go to Step 8

8

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

Did you complete the inspection?

Go to Step 10

Go to Step 09

9
  1. Install the J 39570 Chassis Ear or equivalent.
  2. Bounce the rear of the vehicle, using the J 39570 or equivalent, in order to locate the source of the noise. If necessary road test the vehicle.
  3. Repair or replace any defective component as necessary.

Did you find and correct the condition?

Go to Step 10

System OK

10

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3