Noise Diagnosis - Front 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 front of the vehicle that is induced by VEHICLE SPEED or DRIVING TERRAIN as related to the front 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	Inspect the tires for the following condition: Proper tire Inflation and adjust as necessary. Unusual tire wear. Vibration Analysis - Tire and Wheel Inspect the wheel nuts for looseness and tighten as necessary. Fastener Specifications Did you find and correct the condition?	Go to Step 14	Go to Step 5
5	Inspect the front wheel bearings. Wheel Bearings Diagnosis Did you find and correct the condition?	Go to Step 14	Go to Step 6
6	Inspect for transmission noise. Symptoms - Automatic Transmission Did you find and correct the condition?	Go to Step 14	Go to Step 7
7	Bounce the front of the vehicle in order to duplicate the noise. Did you duplicate the noise?	Go to Step 8	Go to Step 9
8	Raise and support the vehicle. Lifting and Jacking the Vehicle Inspect the front suspension components for looseness. Fastener Specifications Inspect the front suspension components for damage and repair as necessary. Did you find and correct the condition?	Go to Step 14	Go to Step 9
9	Install the J 39570 chassis ear Or equivalent. Bounce the front 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. Repair or replace any damaged components as necessary. Did you find and correct the condition?	Go to Step 14	Go to Step 10
10	Inspect the ball joints and steering components for the following conditions: Lack of lubrication where applicable Looseness in the ball joints. Symptoms - Suspension General Diagnosis Looseness in the steering linkage. Steering Linkage Inspection Looseness in the tie rods. Steering Linkage Outer Tie Rod Replacement Did you find and correct the condition?	Go to Step 14	Go to Step 11
11	Inspect for damaged shock absorbers. Suspension Strut and Shock Absorber Testing - On Vehicle Did you find and correct the condition?	Go to Step 14	Go to Step 12
12	Inspect the front stabilizer shaft and stabilizer shaft links for damage and repair as necessary. Stabilizer Shaft Replacement , or Stabilizer Shaft Link Replacement Did you find and correct the condition?	Go to Step 14	Go to Step 13
13	Inspect for control arm damage and repair as necessary. Lower Control Arm Replacement , or Upper Control Arm Replacement Did you find and correct the condition?	Go to Step 14	-
14	Operate the system in order to verify the repair. Did you correct the condition?	System OK	Go to Step 3