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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 576 (Suspension System General Diagnosis) >> Diagnostic Information And Procedures >> Noise Diagnosis - Rear Suspension

Noise Diagnosis - Rear Suspension

WARNING: This page is about a different car, the 2003 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.

DEFINITION: Any noise 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 system descriptions and perform the necessary inspections? If so, go to next step. If not, see SYMPTOMS - SUSPENSION GENERAL DIAGNOSIS .
    NOTE: Compare the vehicle to an identical vehicle in order to determine if the customer's concern is a characteristic of the vehicle.
  2. Attempt to duplicate the condition. Road test the vehicle. Did you duplicate the condition? If so, go to next step. If not, system is OK.
  3. Is the noise reactive to vehicle load or speed? If so, go to next step. If not, go to step  6.
  4. Measure the tire pressure. Adjust to specifications (32 psi). Inspect the tires for wear. Repair as necessary. Inspect the wheel nuts for looseness. Tighten as necessary. Did you find and correct the condition? If so, go to step  10. If not, go to next step.
  5. Inspect the rear wheel bearings. Repair as necessary. Refer to WHEEL BEARINGS DIAGNOSIS . If the vehicle has a rear differential, inspect the rear axle for noise. Repair as necessary. Did you find and correct the condition? If so, go to step  10. If not, go to next step.
  6. Bounce the rear of the vehicle in order to duplicate the noise. Did you duplicate the noise? If so, go to next step. If not, go to step  9.
  7. Raise the vehicle. Refer to LIFTING AND JACKING THE VEHICLE . Inspect the rear suspension components for looseness. Tighten as necessary. Refer to FASTENER TIGHTENING SPECIFICATIONS in REAR SUSPENSION. Inspect the rear suspension components for damage. Repair as necessary. Did you find and correct the condition? If so, go to step  10. If not, go to next step.
  8. Inspect the rear shock absorbers. Repair as necessary. Refer to STRUTS OR SHOCK ABSORBERS ON-VEHICLE TESTING . Did you find and correct the condition?
  9. Install the J-39570 Chassis Ear or equivalent. See Figure. Bounce the rear of the vehicle. Use the J-39570 or equivalent in order to locate the source of the noise. If necessary, road test the vehicle. Repair as necessary. Did you find and correct the condition? If so, go to next step. If not, system is OK.
  10. Operate the system in order to verify the repair. Did you correct the condition? If so, system is OK. If not, go back to step  3.
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