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Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different car >> Section 43 (Suspension General Diagnosis) >> Diagnostic Information and Procedures >> Noise Diagnosis - Rear Suspension

Noise Diagnosis - Rear Suspension

WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.
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:
Did you find and correct the condition?		 Go to Step 10  Go to Step 5 
5 Inspect the rear axle for rear axle noises. 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. Lifting and Jacking the Vehicle
  2. Inspect the rear suspension components for looseness and tighten as necessary. Fastener Specifications
  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. Suspension Strut and Shock Absorber Testing - On Vehicle 
Did you complete the inspection?		 Go to Step 10  Go to Step 9 
9
  1. Install the J 39570  chassis ear or equivalent.
  2. Bounce the rear of the vehicle, using the J 39570  chassis ear 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 
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